Photochemistry
A.Y. 2024/2025
Learning objectives
The teaching aims to deepen the understanding of: the production of excited electronic states and photochemical and photophysical processes; the main investigation techniques of photoinduced processes; the development of photochemical processes occurring in nature, the principles of photoproduction and photostabilization of polymers, as well as the priciples and potentiality of photo(electro)catalysis.
Expected learning outcomes
The student will acquire knowledge concerning the light-matter interaction, the properties of excited electronic states and the principles and applications of photoinduced processes.
Lesson period: Second semester
Assessment methods: Esame
Assessment result: voto verbalizzato in trentesimi
Single course
This course can be attended as a single course.
Course syllabus and organization
Single session
Responsible
Lesson period
Second semester
Course syllabus
The course contents reflect the objectives and learning outcomes.
Radiation absorption, production and properties of excited electronic states of molecules. The Jablonski diagram. Lifetimes, energy, geometry and acid-base properties of excited electronic states, solvent effects.
Photochemical and photophysical deactivation paths, quenching kinetics of excited states, excimers and exciplexes. Kinetics and mechanism of photochemical reactions. Photoactivity of some classes of chromophores.
Experimental techniques. Radiation sources; operating principles and properties of lasers, luminescence spectroscopy, transient absorption and time-resolved emission spectroscopy.
Photochemistry of the atmosphere and stratosphere, photochemical smog. Energetic aspects of natural photosynthesis.
Photocatalysis and other photochemical processes and applications: i) Photo(electro)chemical processes with semiconductors, photocatalysis for energy conversion and for the degradation of water and air pollutants; ii) Photopolymerizations, photoinitiators and mechanism, photoinduced degradation and stabilization of polymers; iii) Photochromism; iv) Some industrial syntheses via photochemistry.
Laboratory activity (1 CFU)
Acquisition of time-resolved absorption and emission spectra. Experiments with quenching (dynamic and static) of excited electronic states. Testing and characterization of semiconductor photo(electro)catalysts.
Radiation absorption, production and properties of excited electronic states of molecules. The Jablonski diagram. Lifetimes, energy, geometry and acid-base properties of excited electronic states, solvent effects.
Photochemical and photophysical deactivation paths, quenching kinetics of excited states, excimers and exciplexes. Kinetics and mechanism of photochemical reactions. Photoactivity of some classes of chromophores.
Experimental techniques. Radiation sources; operating principles and properties of lasers, luminescence spectroscopy, transient absorption and time-resolved emission spectroscopy.
Photochemistry of the atmosphere and stratosphere, photochemical smog. Energetic aspects of natural photosynthesis.
Photocatalysis and other photochemical processes and applications: i) Photo(electro)chemical processes with semiconductors, photocatalysis for energy conversion and for the degradation of water and air pollutants; ii) Photopolymerizations, photoinitiators and mechanism, photoinduced degradation and stabilization of polymers; iii) Photochromism; iv) Some industrial syntheses via photochemistry.
Laboratory activity (1 CFU)
Acquisition of time-resolved absorption and emission spectra. Experiments with quenching (dynamic and static) of excited electronic states. Testing and characterization of semiconductor photo(electro)catalysts.
Prerequisites for admission
Knowledge acquired during the courses of Physical Chemistry of the Bachelor degree in Chemistry.
Teaching methods
Lectures: Lectures with the aid of projections.
Laboratory: Description of proper instruments. Supervision of students' basic laboratory practice.
Laboratory: Description of proper instruments. Supervision of students' basic laboratory practice.
Teaching Resources
- Lectures notes provided by the Professors.
- Gilbert, J. Baggott, Essentials of Molecular Photochemistry, Blackwell, 1991. R.P. Wayne, Principles and Applications of Photochemistry, Oxford University Press, 1988.
- Gilbert, J. Baggott, Essentials of Molecular Photochemistry, Blackwell, 1991. R.P. Wayne, Principles and Applications of Photochemistry, Oxford University Press, 1988.
Assessment methods and Criteria
The oral examination will aim at ascertaining the knowledge acquired by the student on the topics covered during the lessons and laboratory. The evaluation will be expressed out of thirty.
CHIM/02 - PHYSICAL CHEMISTRY - University credits: 6
Laboratories: 16 hours
Lessons: 40 hours
Lessons: 40 hours
Professor:
Dozzi Maria Vittoria
Shifts:
Turno
Professor:
Dozzi Maria VittoriaProfessor(s)