Synthesis and Characterization of New Fe(II) Schiff Bases Complexes.
|
|
- Lesley Brooks
- 6 years ago
- Views:
Transcription
1 Synthesis and Characterization of New Fe(II) Schiff Bases Complexes. Aurel Pui 1, Malutan Teodor *, Mircea-Odin Apostu, Aurora Gref** It is reported the synthesis and characterization of some new complexes with tetradentate Schiff bases derived from bis(salicylaldehyde)etylenediimine, Salen. The Fe(II) Schiff bases complexes investigated are: (bis(5-nitro-salicylaldehyde)ethylenediiminato)iron(ii), Fe(NSalen), (bis(α-ethylen-salicylaldehyde)ethylenediiminato)iron(ii) Fe(EtSalen), (bis(α-ethylen, 3,5-diiodesalicylaldehyde)ethylenediiminato)iron(II), Fe(DIEtSalen), (bis(α,5-dimethyl, 3-iodesalicylaldehyde)ethylenediiminato)iron(II) Fe(DMISalen), and (bis(salicylaldehyde)methylene p,p - diphenylene)iron(ii), Fe(Salmbfn). The complexes characterization was performed by elemental analysis, Uv-Vis, IR and RX spectroscopy, cyclic voltammetry, etc. Semnificative influences on the redox potentials have the substituents grafted on ligands molecules. These complexes seem capable of forming reversible adducts [LFe - O 2 ], with molecular oxygen. 1. Introduction A series of cations of transitional metals, such as Fe(II), Co(II), Mn(II), Cu(II), etc., forms with Schiff bases, metallic complexes, with theoretical and practical application of quite varied types. Some of them are capable of reversibly binding molecular oxygen, being consequently employed as models in the study of oxygen s reversible fixation such its natural carries (hemoglobins, hemocianines, etc.) [1]. Other complexes - due to their capacity of acting as catalyst- may be employed as models in the study of oxygenases, peroxidases and mono- and di-oxygenases [2]. The synthesis and characterization such new compounds, characterized by different structures and similar properties, represent a prioritary concern of research in various parts of the world [3]. The present study discusses the data reporting the existence of a correlation among the structure and redox potentials of the complexes. Study of the influence of various substituents grafted on the ligands molecules follows the modification of redox potentials of the complexes thus obtained. 2. Experimental part The Schiff bases - type ligands employed have been obtained by refluxing of an aldehyde with a corresponding diamine (2:1 molar ratio). They have been characterized by elemental analysis, UV-Vis, IR, and NMR spectroscopy [4]. The synthesis of coordinative compounds involves refluxing of an alcoholic solution of ligands in forms of a potassium salt, with an aqueous solution acid of FeSO 4 7H 2 O, [5]. Refluxing occurs in an inert Ar atmosphere. The first crystals appear immediately, yet refluxing continues for about an hour. The precipitates obtained have been filtered in vacuum, washed with water, ethanol, ether and then dried under vacuum.
2 2 The complexes characterization was performed by elemental analysis, UV-Vis, IR, Rx spectroscopy and cyclic voltammetry. The elemental analysis of C, H and N was effected to the Microanalysis Service of Paris - Sud University. The comparative UV-Vis spectra of the ligands free and of the complexes have been obtained in organic solvents (DMSO, DMF, CH 2 Cl 2, CH 3 OH), on a double ray DES device. The FT-IR spectra have been recorded on KBr pellets, with a Brucker apparatus. Processing of the data was based on a Opus program. The RX spectra of microcrystalline powders were obtained on a Philips PW 3020 device, equipped with a Cu cathode, while the data were processed with a Diffract program. Cyclic voltametry was made on a PAR 263 A voltammeter, operated by a computer, which employed a PAR M software. The recordings were made on solution with a concentration of 2 mm, in DMF, using 0.1mol/l LiClO 4, as a supporting electrode under inert argon atmosphere. The working electrode was carbon vitreous, with electroactive area A=3.8mm 2. A saturated Ag/AgCl was used as a reference and a platinum wire as an auxiliary electrode 3. Results and discussions The general formula of the ligands of complexes taken into study is presented in figure 1. Fig. 1. The general formula of ligands used The nature of the R 1, R 2, R 3 substituents the carbohydrated chain Z, and abbreviation for the ligands used are presented in Table 1. Table 1. Nature of the substituents of ligands. Ligand R 1 R 2 R 3 Z Salen H H H (CH 2 ) 2 NSalen H NO 2 H (CH 2 ) 2 EtSalen H H CH 3 - CH 2 (CH 2 ) 2 DIEtSalen I I CH 3 - CH 2 (CH 2 ) 2 DMISalen I CH 3 CH 3 (CH 2 ) 2 Salmbfn H H H C 6 H 4 - CH 2 -C 6 H 4 Determination of the composition and purity of the coordinative compounds was effected by determination of the C, H, and N content; the results obtained being listed in Table 2. The result of such analyzes indicate a good purity of the coordinative compounds and separated from solution with a variable number of water molecules. Their presence is put into evidence by the thermal analysis and IR spectroscopy.
3 Table 2. Data of elemental analysis of the [FeL] compounds. 3 Coordinative Molecular Elemental analysis % compounds formula Found Calculated C H N C H N Fe(NSalen) Fe(C 16 H 12 N 4 O 6 ) 1.5 H 2 O Fe(EtSalen) Fe(C 20 H 22 N 2 O 2 ) 3.5 H 2 O Fe(DIEtSalen) Fe(C 20 H 18 N 2 O 2 I 4 ) 3 H 2 O Fe(DMISalen) Fe(C 20 H 20 N 2 O 2 I 2 ) H 2 O Fe(Salmbfn) Fe 2 (C 27 H 20 N 2 O 2 ) 2 (SO4) 5 H 2 O A comparative study of the IR spectra of the free ligands, and also of the metallic complexes, evidences also, modifications of the vibration bands characteristic to the azomethinic group, ν C=N, a deformation bands outside of the plane, δ Ø- O H, as well as of shifting skeletal vibration of the aromatic rings (ν 1 ), etc. (Table 3). Table 3. The FT-IR spectral characteristic bands of the metallic compounds and free ligands (in bracket) δ Ø- O H Compounds ν H2O ν C=N ν 1 Fe(NSalen) 3450 (-) (1646.4) - (1216.0) (1642.2) Fe(EtSalen) 3447 (-) (1613.2) - (1293.9) (1576.2) Fe(DIEtSalen) 3439 (-) (1597.3) - (1267.4) (1481.0) Fe(DMISalen) 3450 (-) (1610.4) - (1264.8) (1583.2) Fe(Salmbfn) 3450 (-) (1616.8) - (1284.0) (1597.6) The deformation bands outside of the plane, δ Ø- O H, of the free lidands, are the missing in the complexes. In the cm -1 domain, the appearance of some new bands, characteristics to the Fe-O bonding vibration is observed [6]. The UV-Vis absorption spectra, performed on the complexes dissolved in organic solvents (CH 2 Cl 2, DMSO), evidence the modification of the absorption bands characteristic to the ligands, as well as the occurrence of some new bands, characteristic for the formation of the coordinative compounds. The UV-Vis bands observed for the complexes of Fe(II) are presented in Table 4. Table 4. UV-Vis absorption bands characteristic for the FeL complexes, in CH 2 Cl 2. Coordinative Absorption bands (λ max (nm); lgε max ) Compound λ 1 (lg ε) λ 2 (lg ε) λ 3 (lg ε) λ 4 (lg ε) λ 5 (lg ε) Fe(NSalen) 1 488* (3.45) 406 (4.11) 354 (4.3) 262 (4.2) - Fe(EtSalen) 550* (2.36) 378 (3.43) (4.26) 226 (4.27) Fe(DIEtSalen) 500* (2.52) 440 (2.64) 356 (4.05) 268* (4.41) 232 (5.13) Fe(DMISalen) 508* (2.89) 422* (3.38) 344 (3.80) 266 (4.41) - Fe(Salmbfn) 510* (3.31) (4.28) 270 (4.19) 232 (4.38) * shoulder, 1 in DMSO
4 4 The appearance of a new band of absorption environs of 500 nm evidence presence of octhaedric complex of Fe(II) in solution [7, 8, 9]. The X - ray spectra performed on microcrystalline powders (Fig. 2), indicate that the Fe(II) ion and the donor atoms (N and O) are suitable in the same plane. The parameters for elemental cell are: a= Å, b= Å, c= Å, V= Å 3 for Fe(DIEtSalen) and a= Å, b= Å, c= Å, V= Å 3 for Fe(DMISalen) complex. Fig. 2. RX spectrum for the Fe(DIEtSalen) (a) and Fe(DMISalen) (b) complex. The studies of cyclic voltametry evidence a reversible or quasi-irreversible behaviour for most of the complexes (Fig.3), the Fe(Salmbfn) excepted, which is irreversible. The free ligands nor show oxidation peaks in range investigated.
5 5 (a) (b) Fig. 3. Cyclic voltamograms for the Fe(NSalen) (a) and Fe(DIEtSalen)complex; C FeL = M, in DMF, working electrode-c vitreous, v = 100 mv/s. The electrochemical behaviour, the values of the peak (Epa, Epc) and semiwaves (E 1/2 ) are listed in Table 5. Table 5. Cyclic voltammetry date for the FeL complexes Electrochemical system Epa Epc Ep E 1/2 E' 1/2 G KJ/mol K Electrochemical behaviours Fe(Salen) quasi-reversible Fe(NSalen) reversible Fe(EtSalen) quasi-reversible Fe(DIEtSalen) quasi-reversible Fe(DMISalen) quasi-reversible Fe(Salmbfn) irreversible E 1/2 = (Epa +Epc)1/2; E' 1/2 = E 1/2 E Fc+/Fc ; G = - nfe, E Fc+/Fc = V The semiwave potentials (E 1/2 ) are converted function of the ferrocenium/ ferrocene (Fc + /Fc) couple, considered come standard intern [10, 11]. The oxidation and, respectively, reduction potentials of such complexes are influenced by the nature of the substituents grafted on the ligands molecules, and equally, on the nature of carbohydrated chain, Z. Presence of the some substituents with donors electronic (-CH 2 - CH 3 or -CH 3 ) effects, increase electronic density on the metallic ion and decrease redox potentials. The presence of some electron-attracting substituents (-NO 2 ) decrease density on the metallic ion and increase redox potentials [12-14]. 4. Conclusions Grafting of various substituents on the aromatic nuclei and in the azomethinic groups of Salen type ligands, lead to the obtention of some new ligands. In reaction with Fe(II) ions,
6 6 they form coordinative compounds in which the metallic ion and ligand s donor atoms are situated in the same plane. The Uv- Vis and IR spectra show changes of free ligands bands come effect of coordinative compounds' forms. Their electrochemical properties are correlated with the nature of substituents grafted on the ligands molecules. References 1. K. Shikama, Chem. Rev., 98 (1998), E. C. Niederhoffer, J. H. Timmons, and A. E. Martell, Chem. Rew., 87 (1984) L. I. Simandi, Dioxygen Activation and Homogeneous Catalytic Oxidation, Elsevier Publishers B. V., Amsterdam, 1991, Al. Cascaval, studies unpublished. 5. R. H. Bailles; M Calvin, J. Am. Chem. Soc., 69 (1947), K. Nakamoto, Infrared Specta of Inorganic and Coordination Compound, second edition, Wiley, New York (1963). 7. L. Casella, M. Gullotti, A. Pinar, L. Messori, A. Rockenbauer, M. Gyor, Inorg. Chem., 26 (1987), A. B. P. Lever, Inorganic Electronic Spectroscopy, second edition, London (1992). 9. Y. Inada, K. Sugimoto, K. Ozutsumi, S Funahashi, Inorg. Chem., 33 (1994), R. R. Gagne, C. A. Koval, G. C. Lisensky, Inorg. Chem.,19 (1980), G. A. Mabbot, J. Chem. Education, 60:9 (1983), A. Nishinaga, K. Tajima, B. Speiser, E. Eichhorn, A. Reiker, H. O. Nishiguchi, K. Ishizu, Chem. Letters, (1991), C. Kang, A. Sobkowiad, D. T. Sawyer, Inorg. Chem., 33 (1994), S. K. Dhar, Inorg. Chim. Acta, 240 (1995) 609. Rezumat Se prezintă sinteza şi caracterizarea unor noi complecşi cu baze Schiff tetradentate derivate de la bis(salicilaldehid)etilendiamina, Salen. Complecşii de Fe(II) cu baze Schiff, investigaţi sunt: bis(5-nitrosalicilaldehid)etilendiamminfer(ii) Fe(NSalen), bis(α-etil-salicilaldehid) etilendiamminfer(ii) Fe(EtSalen), bis(α-etil, 3,5-diiod-salicilaldehid) etilendiamminfer(ii) Fe(DIEtSalen), bis(α, 5-dimetil, 3-iodsalicilaldehid) etilendiamminfer(ii) Fe(DMISalen), şi bis(salicilaldehid)metilen p,p difenilendiamminfer(ii) Fe(Salmbfn). Complecşii au fost caracterizaţi prin analiză elementală, spectroscopie Uv-Vis, IR, RX şi voltametrie ciclică. Substituenţii grefaţi pe moleculele liganzilor au o influenţă semnificativă asupra potenţialelor redox ale complecşilor. Aceşti complecşi par a fi capabili de a forma cu oxigenul molecular aducţi [LFe-O 2 ]. * Faculty of Chemistry, Al. I. Cuza University, Iasi-Romania Faculty of Chemistry, Gh. Asachi Tehnical University, Iasi-Romania **Institute of Molecular Chemistry Orsay, Paris-Sud University, Orsay- France
Advanced Analytical Chemistry Lecture 19. Chem 4631
Advanced Analytical Chemistry Lecture 19 Chem 4631 Organic Electrochemistry is a multidisciplinary science overlapping the fields of organic chemistry, biochemistry, physical chemistry and electrochemistry.
More informationSynthesis, Experimental and Theoretical Characterization of Co (III) Complexes of 2-Hydroxinaphthaldehyde
Advanced Journal of Chemistry-Section A, 2019, 2(3), 184-189 Research Article http://ajchem-a.com Synthesis, Experimental and Theoretical Characterization of Co (III) Complexes of 2-Hydroxinaphthaldehyde
More informationElectrochemical Characteristics of a Cu(II) Schiff Base Complex and Its Interaction with DNA
Asian Journal of Chemistry Vol. 20, No. 3 (2008), 1692-1696 Electrochemical Characteristics of a Cu(II) Schiff Base Complex and Its Interaction with DNA FENG GUO, ZHEN JIA, WEN BO LI, YU MEI LI and XIU
More informationElectronic Supporting Information
Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2015 Electronic Supporting Information A fast and selective probe for detection of CN - and F -
More informationSYNTHESIS AND CHARACTERIZATION OF SOME TETRADENTATE SCHIFF BASE COMPLEXES
Int. J. Chem. Sci.: 6(4), 2008, 1991-1999 SYNTHESIS AND CHARACTERIZATION OF SOME TETRADENTATE SCHIFF BASE COMPLEXES VASISHTA D. BHATT, KETUL N. PATEL, NILESH H. PATEL a and JIGNESH P. RAVAL a Dept. of
More informationBistriazole-p-benzoquinone and its alkali salts: electrochemical behaviour in aqueous alkaline solutions
Electronic Supplementary Material (ESI) for Dalton Transactions. This journal is The Royal Society of Chemistry 2017 Bistriazole-p-benzoquinone and its alkali salts: electrochemical behaviour in aqueous
More information, CH 2. Al. I. Cuza University, Faculty of Chemistry, 11 Bvd. Carol 1,700506, Iasi, Romania. 2
Synthesis Characterization and Catalytic Activity of Some New Manganese (II) Compounds with Tetra-chloro R-bis(salicylaldehyde) Ethylenediamine and R- bis(salicylaldehyde) Phenylenediamine Ligands (R=
More informationA versatile electronic hole in one-electron oxidized Ni II bissalicylidene
Electronic Supplementary Information for manuscript: A versatile electronic hole in one-electron oxidized Ni II bissalicylidene phenylenediamine complexes Olaf Rotthaus, Olivier Jarjayes,* Carlos Perez
More informationTRANSITION METAL COMPLEXES OF BENZOYL ACETONE GLYCINE (L''H2)
TRANSITION METAL COMPLEXES OF BENZOYL ACETONE GLYCINE (L''H2) A.K. Mumthaz Structural, thermoanalytical and antitumour studies on some transition metal complexes of schiff bases Thesis. Department of Chemistry,
More informationBROMAMINE ACID DERIVATED DYES
U.P.B. Sci. Bull., Series B, Vol. 69, No. 2, 2007 ISSN 1454-2331 BRMAMINE ACID DERIVATED DYES Lavinia PRISAN 1, Nicoleta SLAVILA 2, I. SEBE 3 În această lucrare este prezentată obţinerea unor noi coloranţi
More informationSupporting Information Reagents. Physical methods. Synthesis of ligands and nickel complexes.
Supporting Information for Catalytic Water Oxidation by A Bio-inspired Nickel Complex with Redox Active Ligand Dong Wang* and Charlie O. Bruner Department of Chemistry and Biochemistry and Center for Biomolecular
More informationElectronic Supplementary Material (ESI) for Dalton Transactions This journal is The Royal Society of Chemistry Supplementary Information
Supplementary Information 1 2-(2-Hydroxyphenyl)-1H-benzimidazole-manganese oxide hybrid as a promising structural model for Tyrosine 161/Histidine 190-manganese cluster in Photosystem II Mohammad Mahdi
More informationUltrasmall Sn nanoparticles embedded in nitrogen-doped porous carbon as high-performance anode for lithium-ion batteries
Supporting Information Ultrasmall Sn nanoparticles embedded in nitrogen-doped porous carbon as high-performance anode for lithium-ion batteries Zhiqiang Zhu, Shiwen Wang, Jing Du, Qi Jin, Tianran Zhang,
More informationJournal of Chemical and Pharmaceutical Research, 2015, 7(2): Research Article
Available online www.jocpr.com Journal of Chemical and Pharmaceutical Research, 2015, 7(2):641-645 Research Article ISSN : 0975-7384 CODEN(USA) : JCPRC5 Synthesis, characterization and theoretical study
More informationCarbon powder modification. Preparation of NS1, NS2, NS3 and NS4.
SUPPORTING INFORMATION EXPERIMENTAL SECTION Reagents. Carbon powder (Norit-S50) was purchased from Norit, 4-aminobenzene sulfonic acid (99%), lithium perchlorate (99%, potassium ferricyanide (99%) and
More informationCOORDINATION OF Co(II), Ni(II), Cu(II), Zn(II), Cd(II) AND Hg(II) WITH THE NEW SCHIFF-BASE DERIVED FROM 4,5-DIHYDROXIPHTALALDEHIDE AND 2-AMINOTHIAZOLE
OORDIATIO OF o(ii), i(ii), u(ii), Zn(II), d(ii) AD g(ii) WIT TE EW SIFF-BASE DERIVED FROM 4,5-DIYDROXIPTALALDEIDE AD 2-AMIOTIAZOLE Monica Iliş, Angela Kriza, Veronica Pop, Anca icolae ** abstract: A series
More informationAvailable online Research Article. Hamideh Saravani* and Mehdi Sanjarani V.
Available online www.jocpr.com Journal of Chemical and Pharmaceutical Research, 2016, 8(4):1408-1413 Research Article ISSN : 0975-7384 CODEN(USA) : JCPRC5 Synthesis and characterization of Cu 2 BaO 4 nanoparticles
More informationFacile Synthesis and Catalytic Properties of CeO 2 with Tunable Morphologies from Thermal Transformation of Cerium Benzendicarboxylate Complexes
Electronic Supplementary Information Facile Synthesis and Catalytic Properties of CeO 2 with Tunable Morphologies from Thermal Transformation of Cerium Benzendicarboxylate Complexes Yuhua Zheng, Kai Liu,
More informationSupporting Information
Supporting Information German Edition: DOI: High Catalytic Activity of Heteropolynuclear Cyanide Complexes Containing Cobalt and Platinum Ions: Visible-Light Driven Water Oxidation** Yusuke Yamada,* Kohei
More informationSingle Catalyst Electrocatalytic Reduction of CO 2 in Water to H 2 :CO Syngas Mixtures with Water Oxidation to O 2
Electronic Supplementary Material (ESI) for Energy & Environmental Science. This journal is The Royal Society of Chemistry 2014 Supporting Information Single Catalyst Electrocatalytic Reduction of CO 2
More informationFunctionalization of reduced graphene oxides by redox-active ionic liquids for energy storage
Supplementary Material (ESI) for Chemical Communications Functionalization of reduced graphene oxides by redox-active ionic liquids for energy storage Sung Dae Cho, a Jin Kyu Im, b Han-Ki Kim, c Hoon Sik
More informationTheoretical and Experimental Studies on Alkali Metal Phenoxyacetates
Spectroscopy: An International Journal Volume 27 (2012), Issue 5-6, Pages 321 328 doi:10.1155/2012/498439 Theoretical and Experimental Studies on Alkali Metal Phenoxyacetates E. Regulska, M. Samsonowicz,
More informationElectronic Supporting Information
Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2015 Electronic Supporting Information for Mechanochemical reactions studied by in situ Raman spectroscopy:
More informationUgwuomu-Nike, Enugu, Nigeria
International Journal of Advanced Research in Chemical Science (IJARCS) Volume 4, Issue 8, 2017, PP 1-6 ISSN No. (Online) 2349-0403 DOI: http://dx.doi.org/10.20431/2349-0403.0408001 www.arcjournals.org
More informationSelective total encapsulation of the sulfate anion by neutral nano-jars
Supporting Information for Selective total encapsulation of the sulfate anion by neutral nano-jars Isurika R. Fernando, Stuart A. Surmann, Alexander A. Urech, Alexander M. Poulsen and Gellert Mezei* Department
More informationmolecules ISSN
Molecules 2000, 5, 1379 1385 molecules ISSN 1420-3049 http://www.mdpi.org The Relationship between Redox Potentials and Torsional Angles in 4,4 -Dimethyl N, N -Alkylidene 2,2 -Bipyridinium Salts Yijun
More informationComplexes of a porphyrin-like N 4 -donor Schiff-base macrocycle
Electronic Supplementary Information for Complexes of a porphyrin-like N 4 -donor Schiff-base macrocycle Rajni K. Wilson (née Sanyal) and Sally Brooker* [a] [a] Department of Chemistry and MacDiarmid Institute
More informationSupplementary information for Organically doped palladium: a highly efficient catalyst for electroreduction of CO 2 to methanol
Electronic Supplementary Material (ESI) for Green Chemistry. This journal is The Royal Society of Chemistry 2015 Supplementary information for rganically doped palladium: a highly efficient catalyst for
More informationJournal of Chemical and Pharmaceutical Research
Available online www.jocpr.com Journal of Chemical and Pharmaceutical Research ISSN No: 0975-7384 CODEN(USA): JCPRC5 J. Chem. Pharm. Res., 2011, 3(6):195-199 Synthesis and physico -chemical studies of
More informationSYNTHESIS AND CHARACTERIZATION OF SOME NICKEL (II) COMPLEXES VIA BIOACTIVE SCHIFF BASES
SYTHESIS AD CHAACTEIZATIO OF SOME ICKEL (II) COMPLEXES VIA BIOACTIVE SCHIFF BASES Prof. Mehreen Dawre Assi. Prof. D. G. Tatkare Mahavidyalay, Mangaon-aigad Abstract A large number of Schiff bases and their
More informationSupporting Information. Oxygen Reduction Catalysis at a Dicobalt Center: The Relationship of Faradaic Efficiency to Overpotential
Supporting Information Oxygen Reduction Catalysis at a Dicobalt Center: The Relationship of Faradaic Efficiency to Overpotential Guillaume Passard, Andrew M. Ullman, Casey N. Brodsky and Daniel G. Nocera*
More informationElectronic Supplementary Information (ESI) for
Electronic Supplementary Material (ESI) for Energy & Environmental Science. This journal is The Royal Society of Chemistry 2016 Electronic Supplementary Information (ESI) for Highly water- soluble three-
More informationStudy of Y(III), La(lll) and Ce(lll) solid compounds of l-phenylazo-2- naphthol-3,b-disulphonic acid and its p-nitroderivative
Proc. Indian Acad. Sci. (Chem. Sci.), Vol. 100, No. 5, October 1988, pp. 375-379, (~) Printed in India. Study of Y(III), La(lll) and Ce(lll) solid compounds of l-phenylazo-2- naphthol-3,b-disulphonic acid
More informationProposed Mechanism of Photo-Induced Reactions. of Chiral Threonine Schiff Base Cu(II) Complexes. with Imidazole by TiO 2
Contemporary Engineering Sciences, Vol. 6, 2013, no. 6, 255-260 HIKARI Ltd, www.m-hikari.com http://dx.doi.org/10.12988/ces.2013.3634 Proposed Mechanism of Photo-Induced Reactions of Chiral Threonine Schiff
More informationFourier Transform Infrared Spectrophotometry Studies of Chromium Trioxide-Phthalic Acid Complexes
DOI:10.7598/cst2016.1260 Chemical Science Transactions ISSN:2278-3458 2016, 5(3), 770-774 RESEARCH ARTICLE Fourier Transform Infrared Spectrophotometry Studies of Chromium Trioxide-Phthalic Acid Complexes
More informationVisible light photooxidative performance of a. high-nuclearity molecular bismuth vanadium
Supporting Information for Visible light photooxidative performance of a high-nuclearity molecular bismuth vanadium oxide cluster Johannes Tucher, and Carsten Streb* Address: Ulm University, Institute
More information"Unique Ligand Radical Character of an Activated Cobalt Salen Catalyst that is Generated. Takuya Kurahashi and Hiroshi Fujii *
Supporting Information for "Unique Ligand Radical Character of an Activated Cobalt Salen Catalyst that is Generated by Aerobic Oxidation of a Cobalt(II) Salen Complex" Takuya Kurahashi and Hiroshi Fujii
More informationDetermination of stability constant of metal ligand equilibria with special reference to Schiff base and transition elements
Available online at www.scholarsresearchlibrary.com Scholars Research Library Der Pharmacia Lettre, 2015, 7 (12):316-320 (http://scholarsresearchlibrary.com/archive.html) ISSN 0975-5071 USA CODEN: DPLEB4
More informationSynthesis of Schiff s Base Derivatives Using Water as Solvent.(A Green Methodology)
Synthesis of Schiff s Base Derivatives Using Water as Solvent.(A Green Methodology) Ajmal R. Bhat 1, M. Hussain Wagay 2 1,2 Department of Chemistry, Sant Baba Bhag Singh University, Jalandhar, Punjab 144030
More informationElectronic Supporting Information
Electronic Supplementary Material (ESI) for Dalton Transactions. This journal is The Royal Society of Chemistry 2014 Electronic Supporting Information Assembly of HeterobimetallicNi II -Ln III (Ln III
More informationSupplementary Information
Supplementary Information Stable aluminum metal-organic frameworks (Al-MOFs) for balanced CO 2 and water selectivity Haiwei Li, Xiao Feng, * Dou Ma, Mengxi Zhang, Yuanyuan Zhang, Yi Liu, Jinwei Zhang,
More informationSynthesis, characterization and crystal structure of a new supramolecular system containing triorganotin(iv) and 1,3,5- Benzenetricarboxylic acid
Synthesis, characterization and crystal structure of a new supramolecular system containing triorganotin(iv) and 1,3,5- Benzenetricarboxylic acid Azadeh Tadjarodi*, Homayoun Gholipour Research Laboratory
More informationElectronic Supplementary Information
Electronic Supplementary Information A new class of organic donor-acceptor molecules with large third-order optical nonlinearities Tsuyoshi Michinobu, a Joshua C. May, b Jin H. Lim, b Corinne Boudon, c
More informationCHAPTER-5 CYCLIC VOLTAMETRIC STUDIES OF NOVEL INDOLE ANALOGUES PREPARED IN THE PRESENT STUDY
CHAPTER-5 CYCLIC VOLTAMETRIC STUDIES OF NOVEL INDOLE ANALOGUES PREPARED IN THE PRESENT STUDY Page No. 175-187 5.1 Introduction 5.2 Theoretical 5.3 Experimental 5.4 References 5. 1 Introduction Electrochemical
More informationTo Invert or Not To Invert Reasons for the Occurrence of Normal and Inverted Formal Potentials in Molecular Multi-Electron Transfer Systems
To Invert or Not To Invert easons for the Occurrence of Normal and Inverted Formal Potentials in Molecular Multi-Electron Transfer Systems Bernd Speiser Institut für Organische Chemie, Universität Tübingen,
More informationSynthesis of two novel indolo[3,2-b]carbazole derivatives with aggregation-enhanced emission property
Supporting Information for: Synthesis of two novel indolo[3,2-b]carbazole derivatives with aggregation-enhanced emission property Wen-Bin Jia, Hao-Wei Wang, Long-Mei Yang, Hong-Bo Lu, Lin Kong, Yu-Peng
More informationSupporting Information
Supporting Information Highly Selective Colorimetric Chemosensor for Co 2+ Debabrata Maity and T. Govindaraju* Bioorganic Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced
More informationSupplementary Information
Electronic Supplementary Material (ESI) for Dalton Transactions. This journal is The Royal Society of Chemistry 2017 Supplementary Information The electrochemical discrimination of pinene enantiomers by
More informationLecture 6: Physical Methods II. UV Vis (electronic spectroscopy) Electron Spin Resonance Mossbauer Spectroscopy
Lecture 6: Physical Methods II UV Vis (electronic spectroscopy) Electron Spin Resonance Mossbauer Spectroscopy Physical Methods used in bioinorganic chemistry X ray crystallography X ray absorption (XAS)
More informationIntroduction. The analysis of the outcome of a reaction requires that we know the full structure of the products as well as the reactants
Introduction The analysis of the outcome of a reaction requires that we know the full structure of the products as well as the reactants Spectroscopy and the Electromagnetic Spectrum Unlike mass spectrometry,
More informationSupporting Information for the manuscript
Supporting Information for the manuscript Multielectron Redox Chemistry of Lanthanide Ions Supported by Tetradentate Schiff Bases. Clément Camp, Valentin Guidal, Biplab Biswas, Jacques Pécaut, Lionel Dubois
More informationELECTROCHEMICAL AND SPECTRAL STUDIES OF
ELECTROCHEMICAL AND SPECTRAL STUDIES OF [ Cu(acac)(phen)(H2O)] ClO 4 C. Mihailciuc, E. Volanschi, M. Uriasu abstract: The complex [ Cu(acac)(phen)(H2O)] was investigated by using both cyclic and differential
More informationRare double spin canting antiferromagnetic behaviours in a. [Co 24 ] cluster
Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2016 Rare double spin canting antiferromagnetic behaviours in a [Co 24 ] cluster Guang-Ming Liang, Qing-Ling
More informationSupporting Information. High Wettable and Metallic NiFe-Phosphate/Phosphide Catalyst Synthesized by
Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A. This journal is The Royal Society of Chemistry 2018 Supporting Information High Wettable and Metallic NiFe-Phosphate/Phosphide
More informationSynthesis and Spectral Studies of Cobalt (II) and Nickel (II) Complexes with 18-membered Macrocyclic Ligand Derived from Malonodihydrazide
ISSN: 0970-020 X; CODEN: OJCHEG Oriental Journal of Chemistry 2011, Vol. 27, No. (1): Pg. 277-281 http://www.orientjchem.org Synthesis and Spectral Studies of Cobalt (II) and Nickel (II) Complexes with
More informationA Sensitive Dissolved Oxygen Sensor Based on a Charge-Transfer Complex Modified Electrode
Sensors & Transducers ISSN 1726-5479 2006 by IFSA http://www.sensorsportal.com A Sensitive Dissolved Oxygen Sensor Based on a Charge-Transfer Complex Modified Electrode TU Yifeng Institute of Analytical
More informationStudy, preparation and characterization of thiosemicarbazone ligands and their compounds
Study, preparation and characterization of thiosemicarbazone ligands and their compounds Paula Munín*ª, Fátima Lucio-Martínezª, Adolfo Fernandez-Figueirasª, Francisco Reigosaª, José M. Vilaª, M. Teresa
More informationElectrochemistry. Part One: Introduction to Electrolysis and the Electrolysis of Molten Salts
Part One: Introduction to Electrolysis and the Electrolysis of Molten Salts What do I need to know about electrochemistry? Electrochemistry Learning Outcomes: Candidates should be able to: a) Describe
More informationLigand-free coupling of phenols and alcohols with aryl halides by a recyclable heterogeneous copper catalyst
Supporting Information Ligand-free coupling of phenols and alcohols with aryl halides by a recyclable heterogeneous copper catalyst Man Wang, Bizhen Yuan, Tongmei Ma, Huanfeng Jiang and Yingwei Li* School
More informationSpiro-Configured Bifluorenes: Highly Efficient Emitter for UV Organic Light-Emitting Device and Host Material for Red Electrophosphorescence
Spiro-Configured Bifluorenes: Highly Efficient Emitter for UV Organic Light-Emitting Device and Host Material for Red Electrophosphorescence Ken-Tsung Wong,* a Yuan-Li Liao, a Yu-Ting Lin, b Hai-Ching
More informationSupplementary Information
Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2014 Supplementary Information A Novel Single-Side Azobenzene-Grafted Anderson-Type Polyoxometalate
More informationSupporting Information
Electronic Supplementary Material (ESI) for Physical Chemistry Chemical Physics. This journal is the Owner Societies 2015 Supporting Information Electrochemical reduction of CO 2 to ethylene glycol on
More informationLecture 11. IR Theory. Next Class: Lecture Problem 4 due Thin-Layer Chromatography
Lecture 11 IR Theory Next Class: Lecture Problem 4 due Thin-Layer Chromatography This Week In Lab: Ch 6: Procedures 2 & 3 Procedure 4 (outside of lab) Next Week in Lab: Ch 7: PreLab Due Quiz 4 Ch 5 Final
More informationSupporting Information
Supporting Information Solid-state Conversion of Processable 3,4-Ethylenedioxythiophene (EDOT) Containing Poly(arylsilane) Precursors to π-conjugated Conducting Polymers Jayesh G. Bokria, Arvind Kumar,
More informationSupporting Information
Supporting Information A Sn IV -Porphyrin-Based Metal-Organic Framework for the Selective Photo-Oxygenation of Phenol and Sulfides Ming-Hua Xie, Xiu-Li Yang, Chao Zou and Chuan-De Wu* Department of Chemistry,
More informationElectrochemical studies of copper(ii) complexes with Schiff-base ligands
Electrochemical studies of copper(ii) complexes with Schiff-base ligands Santiago Zolezzi a, Evgenia Spodine a,b, Antonio Decinti a, * a Departamento de Química Inorgánica y Analítica, Facultad de Ciencias
More informationSynthesis, Characterization and Use of Schiff Bases as Fluorimetric Analytical Reagents
ISS: 0973-4945; CODE ECJHAO E- Chemistry http://www.e-journals.net Vol. 4, o. 4, pp. 531-535, October 2007 Synthesis, Characterization and Use of Schiff Bases as Fluorimetric Analytical Reagents MOHAMED.
More informationElectronic Supporting Information for
Electronic Supporting Information for An efficient long fluorescence lifetime polymer-based sensor based on europium complex as chromophore for the specific detection of F -, CH 3 COO - -, and H 2 PO 4
More informationSupporting Information. Crystal structures, magnetic and electrochemical properties of. coordination polymers based on the
Supporting Information Crystal structures, magnetic and electrochemical properties of coordination polymers based on the tetra(4-pyridyl)-tetrathiafulvalene ligand Hai-Ying Wang, Yue Wu, Chanel F. Leong,
More informationElectronic Supporting Information
Electronic Supporting Information Solid-State Coexistence of {Zr 12 } and {Zr 6 } Zirconium Oxocarboxylate Clusters Iurie L. Malaestean, Meliha Kutluca Alıcı, Claire Besson, Arkady Ellern and Paul Kögerler*
More informationRedox-switchable supramolecular polymers for responsive. self-healing nanofibers in water
Supporting Information Redox-switchable supramolecular polymers for responsive self-healing nanofibers in water Qiang Yan, Anchao Feng, Huijuan Zhang, Yingwu Yin, Jinying Yuan* Key Lab of rganic ptoelectronics
More informationSupporting Information
Supporting Information Exploring the detection of metal ions by tailoring the coordination mode of V-shaped thienylpyridyl ligand in three MOFs Li-Juan Han,, Wei Yan, Shu-Guang Chen, Zhen-Zhen Shi, and
More informationStandard Reduction Potentials for Oxygen and Carbon Dioxide Couples in Acetonitrile and N,N-Dimethylformamide
Supporting Information for Standard Reduction Potentials for Oxygen and Carbon Dioxide Couples in Acetonitrile and N,N-Dimethylformamide Michael L. Pegis, John A. S. Roberts,, Derek J. Wasylenko, #, Elizabeth
More informationVoltammetric Comparison of the Electrochemical Oxidation of Toluene on Monolithic and Reticulated Glassy Carbon Electrodes in Aqueous Medium
Portugaliae Electrochimica Acta 2010, 28(6), 397-404 DOI: 10.4152/pea.201006397 PORTUGALIAE ELECTROCHIMICA ACTA ISSN 1647-1571 Voltammetric Comparison of the Electrochemical Oxidation of Toluene on Monolithic
More informationSupporting information for. Imino-Chitosan Biodynamers
Supporting information for Imino-Chitosan Biodynamers Luminita Marin, a Bogdan C. Simionescu, a,b Mihail Barboiu c* a PetruPoni Institute of Macromolecular Chemistry of Romanian Academy 41A, Aleea Gr.
More informationHydrogen Evolution on InSb Semiconductor in Liquid Ammonia (223 K)
Portugaliae Electrochimica Acta 20 (2002) 199-205 PORTUGALIAE ELECTROCHIMICA ACTA Hydrogen Evolution on InSb Semiconductor in Liquid Ammonia (223 K) C. Mathieu, O. Seitz, A.-M Gonçalves *, M. Herlem, A.
More informationFig. S1 The Structure of RuCE(Left) and RuCA (Right)
Supporting information Fabrication of CZTS and CZTSSe photocathode CZTS photocathode was fabricated by sulfurization of a stacked film containing Cu, Zn and Sn. The stacked film was fabricated on Mo coated
More informationSupporting Information
Electronic Supplementary Material (ESI) for SC Advances. This journal is The oyal Society of Chemistry 2014 Supporting Information Novel Functional Material Carboxymethyl Cellulose Lithium (CMC-Li) Enhanced
More informationReference electrode. Calomel electrode Hg in contact with Hg(I) chloride Ag/AgCl 15-2
Potentiometry Potential measurements of electrochemical cells Ion selective methods Reference electrode Indicator electrode Potential measuring device Reference electrode Indicator electrodes Ion specific
More informationRedox-Responsive Complexation between a. Pillar[5]arene with Mono ethylene oxide Substituents. and Paraquat
Redox-Responsive Complexation between a Pillar[5]arene with Mono ethylene oxide Substituents and Paraquat Xiaodong Chi, Min Xue, Yong Yao and Feihe Huang* MOE Key Laboratory of Macromolecular Synthesis
More informationOne-pot Solvent-free Synthesis of Sodium Benzoate from the Oxidation of Benzyl Alcohol over Novel Efficient AuAg/TiO 2 Catalysts
Electronic Supplementary Information One-pot Solvent-free Synthesis of Sodium Benzoate from the Oxidation of Benzyl Alcohol over Novel Efficient AuAg/TiO 2 Catalysts Ying Wang, Jia-Min Zheng, Kangnian
More informationEnergy transfer process in the reaction system NH 2 OH-NaOH-Cu(II)-Eu(III)/thenoyltrifluoroacetone
Vol. 07 INTERNATIONAL JOURNAL OF PHOTOENERGY 2005 Energy transfer process in the reaction system NH 2 OH-NaOH-Cu(II)-Eu(III)/thenoyltrifluoroacetone Stefan Lis and Małgorzata Kaczmarek Department of Rare
More informationOne polymer for all: Benzotriazole Containing Donor-Acceptor Type Polymer as a Multi-Purpose Material
One polymer for all: Benzotriazole Containing Donor-Acceptor Type Polymer as a Multi-Purpose Material Abidin Balan a, Derya Baran a, Gorkem Gunbas a,b, Asuman Durmus a,b, Funda Ozyurt a and Levent Toppare
More informationSupporting information
Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A. This journal is The Royal Society of Chemistry 2015 Supporting information The Assembly of Vanadium (IV)-Substituted Keggin-type
More informationMaksim A. Kolosov*, Olesia G. Kulyk, Elena G. Shvets, Valeriy D. Orlov
1 Synthesis of 5-cinnamoyl-3,4-dihydropyrimidine-2(1H)-ones Supplementary Information Maksim A. Kolosov*, lesia G. Kulyk, Elena G. Shvets, Valeriy D. rlov Department of organic chemistry, V.N.Karazin Kharkiv
More information1 Answer. 2 Answer A B C D
216 W10-Exam #1 Page 1 of 9. I. (8 points) 1) Given below are infrared (IR) spectra of four compounds. The structures of compounds are given below. Assign each spectrum to its compound by putting the letter
More informationSPECTROSCOPIC INVESTIGATION OF COPPER (II) COMPLEX WITH MIXED LIGANDS, ASPARTIC ACID AND UREA
SPECTROSCOPIC INVESTIGATION OF COPPER (II) COMPLEX WITH MIXED LIGANDS, ASPARTIC ACID AND UREA V.POP, L.DAVID 1, CECILIA SIMUŢ 2, SANDA FILIP 2, M.DRĂGAN 1 University of Bucharest, Department of Inorganic
More informationNew tris- and pentakis-fused donors containing extended. tetrathiafulvalenes: New positive electrode materials for
Supporting Information for New tris- and pentakis-fused donors containing extended tetrathiafulvalenes: New positive electrode materials for rechargeable batteries Shintaro Iwamoto 1,2, Yuu Inatomi 1,3,
More informationA Highly efficient Iron doped BaTiO 3 nanocatalyst for the catalytic reduction of nitrobenzene to azoxybenzene
Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2014 A Highly efficient Iron doped BaTiO 3 nanocatalyst for the catalytic reduction of nitrobenzene
More informationHydrated nickel(ii) salts are green in colour. Give the electron configuration of a nickel(ii) ion and hence state why the ion is coloured.
1. This question is about nickel compounds. (a) Hydrated nickel(ii) salts are green in colour. Give the electron configuration of a nickel(ii) ion and hence state why the ion is coloured.......... (b)
More informationCHEM 3760 Orgo I, F14 (Lab #11) (TECH 710)
CHEM 3760 Orgo I, F14 (Lab #11) (TECH 710) Identification of an Unknown by IR PRELAB (PreLab is due before entering the lab.) Every student has to prepare for each experiment by answering the Pre-Laboratory
More informationDepartment of Chemistry, University of Basel, St. Johanns-Ring 19, Spitalstrasse 51, and Klingelbergstrasse 80, CH-4056 Basel, Switzerland
Charge Transfer Pathways in Three Isomers of Naphthalene-Bridged Organic Mixed Valence Compounds Hauke C. Schmidt, Mariana Spulber, Markus Neuburger, Cornelia G. Palivan, Markus Meuwly,* and Oliver S.
More informationSupporting Information
Electronic Supplementary Material (ESI) for CrystEngComm. This journal is The Royal Society of Chemistry 2015 A rare case of a dye co-crystal showing better dyeing performance Hui-Fen Qian, Yin-Ge Wang,
More informationThis material is based upon work supported by the National Science Foundation under Grant Number DUE
This material is based upon work supported by the National Science Foundation under Grant Number DUE-1140469. Any opinions, findings, and conclusions or recommendations expressed in this material are those
More informationInterpretation of Organic Spectra. Chem 4361/8361
Interpretation of Organic Spectra Chem 4361/8361 Characteristics of Common Spectrometric Methods H-1 C-13 MS IR/RAMAN UV-VIS ORD/CD X- RAY Radiation type RF RF Not relevant IR UV to visible UV to visible
More informationElectrochemical investigation of covalently post-synthetic modified SURGEL coatings
Electronic Supplementary Material (ESI) for Chemical Communications. This journal is The Royal Society of Chemistry 2014 Electrochemical investigation of covalently post-synthetic modified SURGEL coatings
More informationSupplementary Material. Synthesis of novel C-2 substituted imidazoline derivatives having the norbornene/dibenzobarrelene skeletons
Supplementary Material Synthesis of novel C-2 substituted imidazoline derivatives having the norbornene/dibenzobarrelene skeletons İrfan Çapan a and Süleyman Servi b a Gazi University, Technical Sciences
More informationCatalytic Decomposition of Formaldehyde on Nanometer Manganese Dioxide
Modern Applied Science April, 29 Catalytic Decomposition of Formaldehyde on Nanometer Manganese Dioxide Xiujuan Chu & Hua Zhang (Corresponding author) Tianjin Municipal Key Lab of Fibres Modification and
More informationThe FT-IR, FT-Raman, 1 Hand 13 CNMR study on molecular structure of sodium(i), calcium(ii), lanthanum(iii) and thorium(iv) cinnamates
Spectroscopy 24 (2010) 277 281 277 DOI 10.3233/SPE-2010-0442 IOS Press The FT-IR, FT-Raman, 1 Hand 13 CNMR study on molecular structure of sodium(i), calcium(ii), lanthanum(iii) and thorium(iv) cinnamates
More informationA dynamic, luminescent and entangled MOF as a qualitative sensor for volatile. organic solvents and quantitative monitor for acetonitrile vapour
Electronic Supplementary Information (ESI) for A dynamic, luminescent and entangled MOF as a qualitative sensor for volatile organic solvents and quantitative monitor for acetonitrile vapour Jun-Hao Wang,
More information