Photochromic and Spectrokinetic Properties of Vacuum-Deposited Films of Spirobenzopyrans

N. A. Voloshin Institute of Physical and Organic Chemistry, Rostov University, 194/2, Stachka str., Rostov on Don, 344090, Russia

A. V. Metelitsa Institute of Physical and Organic Chemistry, Rostov University, 194/2, Stachka str., Rostov on Don, 344090, Russia

N. S. Trofimova Institute of Physical and Organic Chemistry, Rostov University, 194/2, Stachka str., Rostov on Don, 344090, Russia

A. V. Vdovenko Institute of Physical and Organic Chemistry, Rostov University, 194/2, Stachka str., Rostov on Don, 344090, Russia

M. I. Knyazhansky Institute of Physical and Organic Chemistry, Rostov University, 194/2, Stachka str., Rostov on Don, 344090, Russia

N. E. Shelepin Institute of Physical and Organic Chemistry, Rostov University, 194/2, Stachka str., Rostov on Don, 344090, Russia

V. I. Minkin Institute of Physical and Organic Chemistry, Rostov University, 194/2, Stachka str., Rostov on Don, 344090, Russia

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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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Photochromic and Spectrokinetic Properties of Vacuum-Deposited Films of Spirobenzopyrans

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Photochromic and Spectrokinetic Properties of Vacuum-Deposited Films of Spirobenzopyrans

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