Abstract
Novel formylsubstituted spiropyrans of the indoline series have been synthesized. Reversible photochromism was observed in vacuum-deposited thin thin solid films of the spirans obtained by evaporation under a pressure of 2.10−5Torr and a boat temperature of 130–180 ° C. Kinetic characteristics of the photochromic transformations depend mostly on the bulkiness on the substituents in both indoline and 2H-chromeoefragments of the spiropyrans. An irreversible photoreaction leading to photodegradation of the photochromic system occurs on prolonged UV-irradiation of thin solid films of the spiropyrans.
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Schedule a callMore From: Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
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