Photochemistry

Module Photochemistry, Summer 2012

Components:

• 2 SWS Lecture   "Principles of Photochemistry and Photophysics",   3 Credit Pts
• 2 SWS Seminar  "Selected Topics of Advanced Photochemistry",     2 Credit Pts

Institute of Chemistry and Biochemistry, Room 23.02 and 34.16/17, Takustr. 3, 14195 Berlin

 

LV 21243a   Photochemistry (Principles of Photochemistry and Photophysics)

Summer 2012, 2 SWS, 3 Credit Pts;  Thu. 10.00–11.30, Room 23.02

1. Introduction

Scope, Aim, and Focus of Photochemistry, Historical Background and Development

2. Light and Matter

Nature and Properties of Electromagnetic Radiation, Quantum Mechanical Principles: Born–Oppenheimer Approximation and Orbital Approximation, Electronic and Vibronic States, Classification of Electronic Transitions, Franck–Condon Principle, Intensity and Selection Rules, Transition Dipole Moment and Oscillator Strength, Spin–Orbit Coupling and Multiplicity, Jablonski Diagram and Follow-Up Processes: Light Emission, Energy Transfer, Photosensitizing, and Photoreactions

3. Excited States

Excited States as Independent Molecules on the Energy Landscape, Photochemical Pathways: Wandering on Potentials, Classification and Types of Photoreactions

4. Methods

Light Sources, Filters and Mononochromators, Photochemical Setups, Monitoring Photoreactions: Actinometry and Spectroscopy, Estimation of Quantum Yields, Remarks on Lab Safety

5. Photofragmentation

Hetero- and Homolytic Cleavage of Bonds, Cleavage of Ketones and Aldehydes, Norrish Type I and II Reactions, Cleavage of Azo-Compounds, Carbenes, Heterolysis of Acids and Bases (Foerster Cycle), Photocleavage of CFCs

6. Photosubstitution

Radical Chain Reactions, Photosubstitution on Arenes: Radical, Nucleophilic, Electrophilic

7. Photoaddition

Principles, Woodward–Hoffman Rules and Frontier Orbitals, pi + sigma and pi + pi Reactions, Cycloaddition, Paterno–Buechi Reaction, Photo Diels–Alder Reaction

8. Photoisomerism

Cis–Trans Isomerism, Ring–Chain Isomerism, Electrocyclization and Cylcoreversion, Sigmatropic Rearrangement, Photo-Fries Reaction

9. Redox Photochemistry

Photoreduction of Carbonyls, Dyes, Azomethines, Nitro-Compounds, and Arenes, Photooxidation with Molecular Oxygen and Singlet Oxygen, Photosensitized Redox-Reactions

 

LV 21243b   Seminar "Selected Topics of Advanced Photochemistry"

Summer 2012, 2 SWS, 2 Credit Pts;  Thu. 14.00–15.30, Room 34.16/17

Potential Topics for Student Seminar Talks:

• Inverse Photochemistry:  Chemoluminescence

• Photochemistry in Biology: Photosynthesis

• Photochemistry in Daily Life:  Photography

• Photochemistry in Materials Science:  Photolithography

• Photochemistry in Medicine:  Photodiagnostics, Cancer Therapy, Sunbathing

• Photochemistry in Our Environment:  Photoreactions in the Atmosphere

• Photochemistry in Society:  Solar Energy

• Photochemistry in Each of Us:  The Process of Seeing