INTRODUCTION<br>Photochemistry and Photophysics in Science and Technology<br>Historical Notes<br>A New Dimension of Chemistry and Physics<br>The Nature of Light<br>Absorption of Light<br>Quantum Yield, Efficiencies, and Excited-State Reactivity<br> <br>ELEMENTARY MOLECULAR ORBITAL THEORY<br>Introduction<br>The Hydrogen Atom<br>Polyelectronic Atoms<br>From Atoms to Molecules<br>Electronic Structure of Homonuclear Diatomic Molecules<br>Electronic Structure of Heteronuclear Diatomic Molecules<br>Simple Polyatomic Molecules and Elements of Group Theory<br>Typical Organic Molecules<br>Transition Metal Complexes<br> <br>LIGHT ABSORPTION AND EXCITED-STATE DEACTIVATION<br>Light Absorption<br>Jablonski Diagram<br>Excited-State Deactivation<br>Chemical Reactions<br>Kinetic Aspects<br>Solvent and Temperature Effects<br>Selected Molecules<br>Semiconductors<br> <br>EXCITED STATES: PHYSICAL AND CHEMICAL PROPERTIES<br>Excited State as a New Molecule<br>Lifetime<br>Energy<br>Geometry<br>Dipole Moments<br>Electron Transfer<br>Proton Transfer<br>Excimers and Exciplexes<br> <br>FROM MOLECULES TO SUPRAMOLECULAR SYSTEMS<br>Supramolecular (Multicomponent) Systems and Large Molecules<br>Electronic Interaction in Mixed-Valence Compounds<br>Electronic Interaction in Donor-Acceptor Complexes<br>Electronic Stimulation and Electronic Interaction in the Excited State<br>Formation of Excimers and Exciplexes in Supramolecular Systems<br> <br>QUENCHING AND SENSITIZATION PROCESSES IN MOLECULAR AND SUPRAMOLECULAR SPECIES<br>Introduction<br>Bimolecular Quenching<br>Quenching and Sensitization Processes in Supramolecular Systems<br>Energy Transfer<br>Role of the Bridge<br>Catalyzed Deactivation<br> <br>MOLECULAR ORGANIC PHOTOCHEMISTRY<br>Introduction<br>Alkenes and Related Compounds<br>Aromatic Compounds<br>Carbonyl Compounds<br>Photochemistry of Other Organic Compounds<br> <br>PHOTOCHEMISTRY AND PHOTOPHYSICS OF METAL COMPLEXES<br>Metal Complexes<br>Photophysical Properties<br>Photochemical Reactivity<br>Relationships between Electrochemistry and Photochemistry<br>Luminescent Metal Complexes<br>Photochemical Processes<br> <br>INTERCONVERSION OF LIGHT AND CHEMICAL ENERGY BY BIMOLECULAR REDOX PROCESSES<br>Light as a Reactant<br>Light as a Product<br>Conversion of Light into Chemical Energy<br>Chemiluminescence<br>Electrochemiluminescence<br>Light Absorption Sensitizers<br>Light Emission Sensitizers<br> <br>LIGHT-POWERED MOLECULAR DEVICES AND MACHINES<br>Molecules, Self-Organization, and Covalent Synthetic Design<br>Light Inputs and Outputs: Reading, Writing, and Erasing<br>Molecular Devices for Information Processing<br>Molecular Devices Based on Energy Transfer<br>Molecular Devices Based on Electron Transfer<br>Light-Powered Molecular Machines<br> <br>NATURAL AND ARTIFICIAL PHOTOSYNTHESIS<br>Energy for Spaceship Earth<br>Natural Photosynthesis<br>Artificial Photosynthesis<br>Water Splitting by Semiconductor Photocatalysis<br> <br>EXPERIMENTAL TECHNIQUES<br>Apparatus<br>Steady-State Absorption and Emission Spectroscopy<br>Time-Resolved Absorption and Emission Spectroscopy<br>Absorption and Emission Measurements with Polarized Light<br>Reaction Quantum Yields and Actinometry<br>Other Techniques<br> <br>LIGHT CONTROL OF BIOLOGICALLY RELEVANT PROCESSES<br>Introduction<br>Vision<br>Light, Skin, and Sunscreens<br>Photochemical Damage in Living Systems<br>Therapeutic Strategies Using Light<br>Photocatalysis in Environmental Protection<br>DNA Photocleavage and Charge Transport<br>Fluorescence<br>Bioluminescence<br> <br>TECHNOLOGICAL APPLICATIONS OF PHOTOCHEMISTRY AND PHOTOPHYSICS<br>Introduction<br>Photochromism<br>Luminescent Sensors<br>Optical Brightening Agents<br>Atmospheric Photochemistry<br>Solar Cells<br>Electroluminescent Materials<br>Polymers and Light<br>Light for Chemical Synthesis<br> <br>GREEN (PHOTO)CHEMISTRY<br>Definitions, Origins, and Motivations<br>Photochemistry for Green Chemical Sy