1 Theoretical Studies of the Photochromism of Organic Compounds. - The Use of Qualitative Models and the Woodward-Hoffmann Rules for Describing Photochromic Systems. - Quantum-Chemical Calculations of the Spectra of Photochromic System Components and Statistical and Dynamic Indices for Estimating Their Reactivity. - Photochromic Spiropyrans. - Discussion of the Mechanisms of Photochromism using Current Ideas on Potential Energy Surfaces. - The Influence of Solvent on Photochromism. - References. - 2 Photochromic Thioindigoid Dyes. - The Structure and Spectra of Thioindigoids. - Production Thermal Stability and Spectra of Z-Isomers of the Thioindigoids. - On the Mechanism of the Photoisomerization of Indigoid Dyes. - The Effect of the Heteroatom of an Indigoid Dye on ?E?R. The Reasons for the Absence of Photochromism in Indigo. - The Influence of Substituents and Environmental Parameters on ?E?R. - Addendum. - References. - 3 Photochromic Compounds with N=N and C=N Chromophores. - The Principal Paths of Photochemical and Thermal E/Z-Isomerization. - Photochromic Azo Compounds. - Photochromic Aryldiazo Compounds. - The Photochromism of Compounds Containing the C=N Chromophore. - References. - 4 Photochromic Tautomeric Systems. - Photochromism of (Nitroaryl) (hetaryl) alkanes. - Photochromic peri-Aryloxy-p-quinones. - Reversible Photoacylotropic Regroupings. - References. - 5 Organic Photochromes for Solar Energy Storage. - The Principle of Accumulating Light Energy as the Energy of Strained Metastable Structures. - Efficiency Criteria. - Various Photochromic Systems for Solar Energy Accumulation and Their Mechanisms. - A Basic Scheme of the Engineering Solution to the Problem of Solar Energy Storage and Release in the Form of Thermal Energy. - Acylotropic Azomethine Systems A New Type ofSolar Energy Storage Battery. - References. - 6 Luminescence of Photochromic Compounds. - Polyacenes and Their Analogs. - Diarylethylenes. - Thioindigoids. - Arylmethane Derivatives. - Spiropyrans. - Azomethineimines. - Compounds with an Intramolecular Hydrogen Bond. - Conclusion. - References. Language: English