Degree Type Year Semester

Transcription

1 Spectroscopy 2015/2016 Code: ECTS Credits: 6 Degree Type Year Semester Chemistry OB 2 2 Contact Name: Ricard Gelabert Peiri Ricard.Gelabert@uab.cat Teachers Use of languages Principal working language: english (eng) Some groups entirely in English: Yes Some groups entirely in Catalan: No Some groups entirely in Spanish: No Xavier Sala Roman Prerequisites Teaching, including teaching materials handed over to students, will be in English, hence good communication skills in English are necessary. Written evaluation materials, including exams and lab reports can be turned in Catalan and Spanish and, of course, English. Only students at have passed e basic topics of Fundamentals of Chemistry ("Fonaments de Química") and Experimentation and Documentation ("Experimentació i Documentació") can take Spectroscopy ("Espectroscòpia"). The course assumes at e student has working knowledge of quantum chemistry; it is us very advisable to have taken (and preferably passed) e Quantum Chemistry ("Química Quàntica") subject. Objectives and Contextualisation In e topic of Spectroscopy e focus is e study of e interaction of electromagnetic radiation and matter, and how is interaction can be used to determine details on e structure of e latter. The eoretical foundations at explain e interaction of radiation and matter and predict e structured form of spectra are laid out first, relying on a working knowledge of quantum chemistry. Laser radiation is discussed, as its use is ubiquitous in current spectroscopic techniques. A specific focus is made on symmetry as a powerful tool to explain characteristics of certain spectra in polyatomic molecules. From ere on, different spectroscopic techniques are discussed. For each kind, e structure of e corresponding spectrum is connected to e structural parameters of e molecules using quantitative relations derived from quantum mechanics. Specific goals of e topic: Understand e basics of interaction of electromagnetic radiation wi matter. Understand e rules at determine e frequency and intensity of a transition. Know how to apply is knowledge to be able to solve problems bo in qualitative and quantitative aspects. Skills Adapt to new situations. 1

2 Apply knowledge of chemistry to problem solving of a quantitative or qualitative nature in familiar and professional fields. Be eically committed. Communicate clearly in English. Have numerical calculation skills. "Interpret data obtained by means of experimental measures, including e use of IT tools; identify eir meaning and relate e data wi appropriate chemistry, physics or biology eories." Learn autonomously. Manage, analyse and synesise information. Manage e organisation and planning of tasks. Obtain information, including by digital means. Propose creative ideas and solutions. Reason in a critical manner Resolve problems and make decisions. Show an understanding of e basic concepts, principles, eories and facts of e different areas of chemistry. Show motivation for quality. Use IT to treat and present information. Use e English language properly in e field of chemistry. Learning outcomes Adapt to new situations. Apply e physical principles of matter-radiation interactions to e qualitative and quantitative interpretation of spectrums. Be eically committed. Communicate clearly in English. Communicate in English in e laboratory. Employ and generalise e relationships between structure and spectroscopic meods. Establish spectroscopic response in different structural characteristics. Handle computer programs, including simulators, to support e previous interpretation. Have numerical calculation skills. Identify e physical principles at govern matter-radiation interactions. Learn autonomously. Manage, analyse and synesise information. Manage e organisation and planning of tasks. Obtain information, including by digital means. Propose creative ideas and solutions. Reason in a critical manner Recognise spectroscopic terminology in e English language. Recognise e English terms used to describe chemical structure. Resolve problems and make decisions. Show motivation for quality. Use IT to treat and present information. Use e most common English chemistry terms. Use e physical principles of matter-radiation interactions to relate e signals of different spectrums wi e possible species present in a certain chemical system. Content Theory: Introduction to Spectroscopy. Nature of e electromagnetic radiation. Electromagnetic spectrum. Spectroscopic techniques. FT Spectroscopy. Spectral line wid. Intensity of spectral lines. Selection rules. Raman Spectroscopy. Example: Rotational spectroscopy of diatomic molecules. Lasers. 2

3 Molecular Symmetry. Symmetry elements and operations. Symmetry point groups. Systematic determination of molecular point group. Group Representations. Reducible and irreducible representations. Character tables. Vibrational Spectroscopy. Vibration of diatomic molecules. Harmonic oscillator model. Anharmonicity. Dissociation energy. Vibration of polyatomic molecules: Normal modes of vibration. Types of normal modes. Symmetry of normal modes. Selection rules for polyatomic molecules. Mutual exclusion rule. Electronic Spectroscopy. Atomic spectroscopy. Spectral terms. Selection Rules. Electronic spectroscopy of diatomic molecules. Vibrational structure: vibronic spectra. Franck-Condon principle. Electronic spectroscopy of polyatomic molecules. Symmetry considerations. Fluorescence and phosphorescence. Photoelectron spectroscopy. 5. Magnetic Resonance Spectroscopy. Nuclear and electronic spin. Interaction wi a magnetic field. Nuclear magnetic resonance (NMR) spectroscopy. Energy levels and selection rules. Nuclear shielding. Chemical shift. Spin-spin coupling. Oer MR spectroscopies. Lab Sessions: A total of five sessions (4 hours each), plus a six session of evaluation (order to be determined). The contents willbe: Basic experimental techniques in spectroscopy (I): IR of gas and liquid samples. Basic experimental techniques in spectroscopy (II): UV-VIS and NMR Simulation of Vibrational Spectra Simulation of Electronic Spectra Simulation of NMR Spectra A Project/Case, worked out in e simulation sessions (3 to 5 above). Meodology The activities belong to four different categories: Theory Lectures The lecturer will explain e syllabus to e classroom using blackboard and multimedia material, which will be made available to e students in e "Campus Virtual". These expositive sessions will conform most of e eory lecturing of e syllabus. Problem-solving Sessions: A list of graded exercises, classified according to e units of e syllabus, will be made available to all students in e "Campus Virtual" at e beginning of e term. On appointed days, announced in e eory lectures, or whenever it is adequate in terms of covered material, selected problems will be solved in e lecture room, explaining e eoretical foundations, computational details, etc., necessary to solve e exercise and in e process strengen e concepts explained in e eory lectures. No compromise is taken to solve all problems in e collection explicitly, to leave room for individual initiative and encourage individual work by e student. 3

4 Lab Sessions The practical sessions will present e students wi e possibility to (1) compute spectroscopic properties of certain molecules using quantum chemistry code or oer software to simulate spectra and use e detailed results to weave eoretical aspects wi e outcome of spectrum recording, and also (2) be introduced to basic spectroscopic techniques in a real chemistry lab. It is a goal of e lab sessions to bring up e benefits of a synergy between eoretical and experimental approaches in modern chemistry. Logistically, e students of all enrollment groups will be divided in two groups, e composition of which will be known beforehand, in order to make efficient use of e lab and computer facilities available. Practical sessions for each subgroup will take place at e appoited dates in different labs and under supervision of qualified instructors. For all lab sessions, e lab protocol will be made available in e "Campus Virtual", and e students have to bring eir own hard copy and read it before e lab session. It is advisable to bring also a personal notebook to write down e results obtained and oer annotations. Besides, in experimental lab sessions it is compulsory at students show up wi apron and protective goggles. On appointed days, e students will be summoned to e lab/computer room. At e end of each practical session e students will be given an answer sheet and questionnaire, to be completed and turned in before leaving e lab, which will serve e purpose of assessing e level of comprehension of e task just completed and e qualityof e results obtained, and from which e lab grade will be drawn. Personal Work Personal work by e student is a very important, almost indispensible aspect of e students' attitude towards passing e topic. Besides e most obvious areas (like readying and studying notes and books, preparing exercises, etc.) specific, well delimited areas of e eory syllabus will be left to e students to work out by emselves. In ese cases, personal consultation hours will be made available to help coalescing e knowledge gained by e students. Important Note: Teaching, including all teaching and evaluation materials (e.g. exams, lab report forms) will be given out in English. However, written answers in evaluation materials will be accepted in Catalan and Spanish. Activities Title Hours ECTS Learning outcomes Type: Directed Lab Sessions , 2, 5, 4, 20, 6, 7, 12, 22, 8, 3, 14, 15, 16, 18, 17, 19, 9, 23, 21 Problem Solving Sessions , 11, 5, 4, 20, 6, 7, 13, 10, 22, 8, 16, 18, 17, 19, 9, 23 Theory Lectures , 11, 4, 6, 7, 12, 10, 22, 8, 14, 16, 18, 17, 23 Type: Supervised Case Preparation , 2, 11, 5, 4, 20, 6, 7, 12, 13, 10, 22, 8, 3, 14, 15, 16, 18, 17, 19, 9, 23, 21 Type: Autonomous Personal Study , 11, 6, 7, 12, 13, 10, 22, 8, 14, 16, 18, 17, 19, 9, 23 Problem Solving , 11, 4, 6, 7, 12, 13, 10, 22, 8, 14, 15, 16, 18, 17, 19, 9, 23 4

5 Evaluation The evaluation is based on a "continuous evaluation" scheme, comprising e following items: Lab reports, turned in at e end of each practical session 10% Solve a given "Case": working in groups of 4 people, e students will have to work out, using quantum chemistry software and spectroscopic databases as needed, detailed spectroscopic properties of proposed molecules, present eir case in a short oral presentation, and answer questions from e evaluators. The grade will reflect bo e quality of e results and presentation (same for all members), and e individual responses of each student 15% A certain number of short exercises will be proposed, spread out along e semester, some to be returned on e spot, some to be done at home 15% Two partial written exams, covering approximately one-half of e syllabus each and to be held on dates and times known at e time of enrollment. A minimum score of 4/10 is required in each for em to count towards e final grade. Each of ese tests will count towards 30% of e final grade. 2x30%=60%. A final exam which will only be compulsory for students who have not scored 4/10 in any or bo of e partial exams above. This exam will be divided in two halves matching e contents of e first set of tests. The student is required to take at least e part where s/he did not attain 4/10. Students wishing to improve eir score can take is exam too, whole or piecewise, but in doing so ey give up e grade in e partial exam and take instead e grade of e final. Note at it is possible to lower e grade in is way 60% To pass e subject, students need to attain sufficient proficiency in e practical and eoretical aspects of e topic. The final grade is obtained by adding e following ree contributions, (a), (b), and (c): (a) Practical aspects: items (1)+(2) (b) Theoretical aspects: Item (4) (c) Personal work: item (3) However, it is necessary at grades of e Practical (a) and Theoretical (b) parts of e topic are each at least 4/10. The topic od Spectroscopy is passed wi a total grade of 5/10. Note at lab attendance is compulsory. For grading purposes, a student will be considered as non-evaluable (" no presentat"), if any of e following applies: has not attended any lab session wiout motive. This includes showing up wiout goggles and/or apron when required, as e student will not be accepted in e lab on safety grounds. cannot achieve a grade of 5/10 wi his/her own evaluation items, and could not achieve it wi e same items even if s/he had achieved in ose e highest grade. Evaluation activities Title Weighting Hours ECTS Learning outcomes Case Presentation 15% , 5, 4, 20, 12, 13, 22, 14, 15, 16, 18, 17, 19, 9, 21 Final Exam 60% , 11, 6, 7, 10, 22, 3, 15, 16, 18, 17, 19, 9, 23 Lab Reports 10% , 5, 20, 6, 7, 12, 22, 8, 3, 15, 16, 18, 17, 9, 23 Partial Exams 60% , 11, 6, 7, 10, 22, 3, 15, 16, 18, 17, 19, 9, 23 5

6 Turned-in Exercises 15% , 20, 6, 7, 22, 3, 15, 16, 18, 17, 19, 9, 23 Bibliography Basic Texts: C. N. Banwell, E. M. McCash, Fundamentals of Molecular Spectroscopy, 4 Ed., McGraw Hill, 199 (An old Spanish translation exists: C. N. Banwell, Fundamentos de Espectroscopía Molecular, Ed. del Castillo, Madrid, 1977, ISBN ). J. M. Hollas, Modern Spectroscopy, 4 Ed., John Wiley & Sons, 2004 (Does not cover magnetic resonance). P. Atkins, J. de Paula, Atkins' Physical Chemistry, 8 Ed., Oxford University Press, 2005 Specialized Texts and Monographies: P. Atkins, R. Friedman, Molecular Quantum Mechanics, 5 Ed., Oxford University Press, 201 D. J. Willock, Molecular Symmetry, Wiley, P. J. Hore, Nuclear Magnetic Resonance, Oxford Chemistry Primers, Oxford University Press,