Supplementary Material (ESI) for Dalton Transactions This journal is The Royal Society of Chemistry 2011
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1 upplementary Material (EI) for Dalton Transactions This journal is The Royal ociety of Chemistry 211 Electronic upplementary Information for: Accessing the long-lived emissive 3 IL triplet excited states of coumarin fluorophores by direct cyclometallation and its application for oxygen sensing and upconversion Wenting Wu, Wanhua Wu, haomin Ji, Huimin Guo and Jianzhang Zhao* tate Key Laboratory of Fine Chemicals, chool of Chemical Engineering, Dalian University of Technology, 2 Ling-gong Road, Dalian 11624, P. R. China. zhaojzh@dlut.edu.cn (J. Zhao) Phone/Fax: Index General information 1 Figure 1. 1 H MR of L-3. 2 Figure 2. EI M of L-3. 2 Figure 3. 1 H MR of of Pt-3. 3 Figure 4. MALDI M of Pt-3. 3 Figure 5. 1 H MR of 2-Hydroxy-3-naphthaldehyd. 4 Figure 6. TF M of 2-Hydroxy-3-naphthaldehyd 4 Figure 7. 1 H MR of L-4. 5 Figure C MR of L-4. 5 Figure 9. EI M of L-4. 6 Figure 1. 1 H MR of Pt-4. 6 Figure 11. MALDI M of Pt-4. 7 Table 1 and cheme1. Low-lying excited states of Pt-1. 8 Table 1 and cheme1. Low-lying excited states of Pt-3 1 Figure 12. The digital photographs of upconversion with 532 nm. 11 Figure 13. Determination of the upconversion quantum yields with laser dye as reference. 12 Experimental ection General Typical film preparation was undertaken by dissolving 1. mg of IMPEK-C polymer in.3 ml acetone to which was added.4 ml of Pt-1 complex solution in CH 2 Cl 2 (5 1-4 M). After thorough mixing, about.3 ml of the solution was applied to a quartz glass disk (diameter: 1.6 cm) and the solvent was evaporated at room temperature to realize a transparent film. The thickness of the film of Pt-1 was estimated as 16.8 μm, according to the mass of the film (3.9 mg), the density of the polymer (1.14 g cm -3 ) and the size of the film. imilarly the thickness of the film of Pt-2, and Pt-3 were estimated as 17.6 μm and 12.5 μm, respectively. The ground state structure of complexes were optimized using density functional theory (DFT) 1 with B3LYP functional and 6-31G(d)/ LanL2DZ basis set. The excited state related calculations were carried out with the Time dependent density functional theory (TD-DFT) with the optimized structure of the ground state (DFT 6-31G(d)/ LanL2DZ) There are no imaginary frequencies in frequency analysis of all calculated structures, therefore each calculated structure express an energy minimum. All these calculations were performed in Gaussian 9. 2 Reference: 1. Hohenberg P, Kohn W. Phys. Rev. 1964; 136: B M. J. Frisch, G. W. Trucks, H. B. chlegel, et al. Gaussian 9 Revision A.1, Gaussian Inc., Wallingford CT, 29.
2 upplementary Material (EI) for Dalton Transactions This journal is The Royal ociety of Chemistry Figure 1. 1 H MR of L-3 (CDCl 3, 4 MHz) w2 zjz (6.218) Cm (374:386-5:4) 1 GCT CA May-2112:44:32 TF M EI e4 % m/z Figure 2. EI M of L-3. 2
3 upplementary Material (EI) for Dalton Transactions This journal is The Royal ociety of Chemistry Figure 3. 1 H MR of Pt-3 (CDCl 3, 4 MHz) WWT (.465) Cn (Cen,4, 5., Ht); m (G, 2x3.); b (15,1. ); Cm (8:16) TF LD % Pt Figure 4. MALDI M of Pt-3. m/z 3
4 upplementary Material (EI) for Dalton Transactions This journal is The Royal ociety of Chemistry Figure 5. 1 H MR of 2-Hydroxy-3-naphthaldehyd (CDCl 3, 4 MHz). WWT (.373) AM (Cen,6, 8., Ar,5.,.,.7); m (G, 2x3.); Cm (1:3) e4 % Figure 6. TF M of 2-Hydroxy-3-naphthaldehyd. m/z 4
5 upplementary Material (EI) for Dalton Transactions This journal is The Royal ociety of Chemistry Figure 7. 1 H MR of L-4 (CDCl 3, 4 MHz) Figure C MR of L-4 (CDCl 3, 1 MHz). 5
6 upplementary Material (EI) for Dalton Transactions This journal is The Royal ociety of Chemistry 211 WWT (.135) AM (Cen,6, 8., Ar,5.,429.2,.7,L 1); m (G, 2x3.); b (1,4. ); Cm e3 % m/z Figure 9. EI M of L Figure 1. 1 H MR of Pt-4 (CDCl 3, 4 MHz) 6
7 upplementary Material (EI) for Dalton Transactions This journal is The Royal ociety of Chemistry 211 WWT (.65) Cn (Cen,4, 5., Ht); m (G, 2x3.); b (15,1. ); Cm (1:19) TF LD e Pt % m/z Figure 11. MALDI M of Pt-4. 7
8 upplementary Material (EI) for Dalton Transactions This journal is The Royal ociety of Chemistry 211 Table 1. Electronic Excitation Energies (ev) and corresponding scillator trengths (f), main configurations and CI coefficients of the Low-lying Electronically Excited tates of complex Pt-1, Calculated by TDDFT//B3LYP/6-31G(d)/ LanL2DZ, based on the DFT//B3LYP/6-31G(d)/ LanL2DZ ptimized Ground tate Geometries. Electronic TDDFT//B3LYP/6-31G(d) transition Energy [a] f [b] Composition [c] CI [d] Character [e] inglet ev 44 nm.773 H 3 L.1137 LLCT&MLCT H 1 L.2129 LLCT&MLCT H L.6293 LLCT&MLCT ev 372 nm.741 H 1 L.6289 LLCT&MLCT H L.238 LLCT&MLCT ev 37 nm.2225 H 3 L.6371 LLCT&MLCT H L Triplet T ev 55 nm. [f] H 3 L.237 LLCT&MLCT H 1 L.562 LLCT&MLCT H L.587 LLCT&MLCT [a] nly the selected low-lying excited states are presented. [b] oscillator strength. [c] H stands for HM and L stands for LUM. nly the main configurations are presented. [d] The CI coefficients are in absolute values. [e] IL: intraligand, LLCT: ligand to ligand charge transfer, MLCT: metal to ligand charge transfer. [f] o spin-orbital coupling effect was considered, thus the f values are zero. LUM LUM+1 LUM+2 LUM+3 Pt Pt-1 HM HM 1 HM 2 HM 3 cheme 1. Qualitative scheme of frontier molecular orbitals of Pt-1 calculated by DFT/TDDFT at the B3LYP/6-31G((d)/ LanL2DZ level using Gaussian 9. 8
9 upplementary Material (EI) for Dalton Transactions This journal is The Royal ociety of Chemistry 211 Table 2. Electronic Excitation Energies (ev) and corresponding scillator trengths (f), main configurations and CI coefficients of the Low-lying Electronically Excited tates of complex Pt-3, Calculated by TDDFT//B3LYP/6-31G(d)/ LanL2DZ, based on the DFT//B3LYP/6-31G(d)/LanL2DZ ptimized Ground tate Geometries. Electronic TDDFT//B3LYP/6-31G(d) transition Energy [a] f [b] Composition [c] CI [d] Character [e] inglet 1 3. ev 412 nm.214 H 5 L.142 H 1 L.1275 LLCT H L.6312 IL ev 367 nm.1224 H 1 L.6625 LLCT H L.1146 IL ev 338 nm.454 H 2 L.667 IL ev 32 nm.1311 H 5 L.3799 H 4 L H 1 L LLCT&MLCT Triplet T ev 556 nm. [f] H L.7514 IL [a] nly the selected low-lying excited states are presented. [b] oscillator strength. [c] H stands for HM and L stands for LUM. nly the main configurations are presented. [d]the CI coefficients are in absolute values. [e] IL: intraligand, LLCT: ligand to ligand charge transfer, MLCT: metal to ligand charge transfer. [f] o spin-orbital coupling effect was considered, thus the f values are zero. LUM LUM+1 LUM+2 LUM+3 Pt Pt-3 HM HM 1 HM 2 HM 3 cheme 2. Qualitative scheme of frontier molecular orbitals of Pt-3 calculated by DFT/TDDFT at the B3LYP/6-31G((d)/ LanL2DZ level using Gaussian 9. 9
10 upplementary Material (EI) for Dalton Transactions This journal is The Royal ociety of Chemistry 211 [Ru(dmb) 3 ] 2+ Pt-2 Pt-3 Pt-4 Pt-2+DPA [Ru(dmb) 3 ] 2+ +DPA Pt-3+DPA Pt-4+DPA Figure 12. The digital photographs of (a) the emission of the complexes alone, with 532 nm laser excitation (5 mw) and (b) the upconversion, i.e. the excitation of the mixed solution of the complex with DPA. For Pt-2, Pt-3 and Pt-4, the upconverted blue fluorescence of DPA were observed, among which the Pt-2 shows the most intensive emission. In deaerated CH 2 Cl 2 solution. The complexes solution are at M and the DPA concentration is at M. 25 C. Pt Pt-2 Pt Pt-3 Pt Pt-4 DPA 1
11 upplementary Material (EI) for Dalton Transactions This journal is The Royal ociety of Chemistry 211 Emission Intensity / a.u Pt-2 DCM [Ru(dmb) 3 ] 2+ Pt-3 Pt Wavelength / nm Figure 13. Emission of the fluorescence of DCM ( M) and the upconverted fluorescence of 9,1-diphenylanthracene (DPA, M) and the residual photoluminescence of the complex of Pt-2, Pt-3, Pt-4 and [Ru(dmb) 3 ] 2+ ( M) in the upconversion experiments. Excitation by diode pumped solid state blue laser (λex = 473 nm, 5 mw). 25 C. Pt Pt-1 Pt Pt-2 Pt Pt-3 Pt Pt-4 C C DCM DPA 11
12 upplementary Material (EI) for Dalton Transactions This journal is The Royal ociety of Chemistry 211 Figure 14. Comparison of the UV-Vis absorption and the excitation spectra of the complex (a) Pt-2. The excitation spectra were recorded with λem = 597 nm. (b) Pt-4. The excitation spectra were recorded with λem = 629 nm c = mol dm -3 of the compounds in dichloromethane. 25 C. Emission intensity a in 2 in air in Wavelength / nm Emission intensity b in 2 in air in Wavelength / nm Figure 15. Emission spectra of (a) Pt-1, λex = 44 nm, (b) Pt-4, λex = 472 nm, in CH 2 Cl 2 solution saturated with air, oxygen and nitrogen. c = mol / L, 25 C. 12
13 upplementary Material (EI) for Dalton Transactions This journal is The Royal ociety of Chemistry 211 Emission intensity / a.u air % 2 4% 2 2 a Pt Time / s Emission intensity / a.u % 5.2% % 4% 2% 3.5% 3.5% 4 3% 1% 3% 1% 7% 2 b Pt Time / s Figure 16. Phosphorescent emission intensity response of the complexes to step variations of 2 concentration levels. (a) and (b) Pt-1, λex = 44 nm, λem = 543 nm. 25 C. Pt sensitizer Effect of light-harvesting on TTA Effect of τ and 3 IL on TTA efficiency DPA Annihilator 1 DPA* 1 IL* IC 1 MLCT* 3 DPA* 3 IL* TTET 3 TTA DPA* E 2.67 ev 464 nm ε = ev 496 nm ε = ev 596 nm 2.8 ev 1.77 ev 7 nm 3 DPA* 3.1 ev 4 nm cheme 3. Qualitative Jablonski Diagram illustrating the sensitized TTA up-conversion process between Pt(II) complexes and DPA. The effect of the light-harvesting ability and the luminescent lifetime of the Pt(II) sensitizer on the efficiency of the TTA-up-conversion is also shown (please note that the vibration energy levels of each electronic state are omitted for clarity. However, the vibrational energy levels may also be important for the photophysics). E is energy. G is ground state ( ). 1 IL* is intraligand singlet excited state (coumarin localized). IC is inner conversion. 1 MLCT* is the Pt(II) based metal-to-ligand charge transfer singlet excited state. IC is intersystem crossing. 3 IL* is intraligand triplet excited state (coumarin localized). TTET is triplet-triplet energy transfer. 3 DPA* is the triplet excited state of DPA. TTA is triplet-triplet annihilation. 1 DPA* is the singlet excited state of DPA. The emission bands observed for the sensitizers along is the 3 MLCT emissive excited state (we propose the 3 IL* is non-emissive). The emission bands observed in the TTA experiment is the simultaneous 3 MLCT* emission (phosphorescence) and the 1 DPA* emission (fluorescence). 13
Haiyang Sun, Huimin Guo,* Wenting Wu, Xin Liu, Jianzhang Zhao*
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