Organic Photochromes

Organic Photochromes

by A.V. El'tsov (Editor)

Paperback(Softcover reprint of the original 1st ed. 1990)

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Product Details

ISBN-13: 9781461585879
Publisher: Springer US
Publication date: 03/01/2012
Edition description: Softcover reprint of the original 1st ed. 1990
Pages: 280
Product dimensions: 6.69(w) x 9.61(h) x 0.02(d)

Table of Contents

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.- Chromenes and related compounds.- Reversible photocyclizations and cycloadditions.- Photochromism of indigoids.- Photoisomerization of azines.- Hydrogen migration in photochromic systems.- Discussion of the Mechanisms of Photochromism using Current Ideas on Potential Energy Surfaces.- E/Z-Photoisomerizations.- Reversible photocyclizations.- Hydrogen phototransfer.- 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.- Direct and triplet-sensitized photoisomerization.- Photocatalytic isomerizations.- Photochromic Azo Compounds.- Electronic absorption spectra.- Luminescence.- The mechanisms of E/Z-photo- and thermal isomerization and photo- and thermal dissociation.- The application of the photochromism of azo compounds.- Photochromic Aryldiazo Compounds.- Electronic spectra.- The mechanisms of Z/E-photo- and thermal isomerization and photo- and thermal decomposition.- The uses of the photochromic properties of aryldiazo compounds.- The Photochromism of Compounds Containing the C=N Chromophore.- Electronic spectra.- The mechanisms of the E/Z-photo- and thermal isomerization of compounds with the C=N chromophore.- References.- 4 Photochromic Tautomeric Systems.- Photochromism of (Nitroaryl) (hetaryl) alkanes.- Structural features of photochromic (nitroaryl) (hetaryl) alkanes.- The nature of photoinduced forms of (nitroaryl) (hetaryl) alkanes and the mechanism of their formation.- The effect of structure on the color of observed photochromes.- The decoloration of colored forms.- The quantum yields of photocoloration.- Irreversible photodissociation.- The photochromism of (nitroaryl) (hetaryl) alkanes in crystals, melts, and polymer films.- Photochromic peri-Aryloxy-p-quinones.- The structure of the photoinduced form.- The relation between the structure and photochromism of aryloxyquinones.- Absorption and luminescence.- The mechanism of photoisomerization.- Potential practical applications.- 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.- Geometric isomerizations.- Valence isomerizations.- Dissociation reactions and dimerization.- 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 of Solar 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.

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