Photochemistry of a 6′‐cyanosubstituted spironaphthooxazine: photo‐induced decay of an open form

Photochemistry of three 6′‐cyanosubstituted spironaphthooxazines (SNO) in ethanol matrices at 77 K was studied by means of ultraviolet (UV) and erythrocyte sedimentation rate (ESR) spectroscopy and quantum chemistry. The quantum yield of the open form photolysis is found to be 0.01–0.02, which is high enough for 77 K. For one of the SNO, the formation of a merocyanine form radical was observed. The radicals were formed by an H atom abstraction from the solvent molecule to the light‐excited merocyanine isomers. The formation of a merocyanine radical represents a new specific channel of photochemically induced degradation of spirooxazines. Copyright © 2011 John Wiley & Sons, Ltd.     

Structures of spiropyrans exhibiting photochromic properties in the solid state

Russian Chemical Bulletin - Solid-state photochromic indoline spiropyrans bearing a formyl group at the 6′ and 8′ positions of the 2H-chromene moiety of the molecules were...     

Photo- and thermochromic spirans. 35.* Synthesis and photochromic properties of spiro[indoline-2,3′-pyrano[3,2-f]quinolines] and their cationic derivatives

New photochromic spiropyranoquinolines and their cationic derivatives have been synthesized. Quaternization of the quinoline fragment leads to significant enhancement of the thermal stability of the merocyanine isomers of these cationic spiropyrans.     

Binuclear Di-o-Quinone Cobalt Complexes with the Acene Linker: Quantum Chemical Study of the Structures and Magnetic Properties

Russian Journal of Coordination Chemistry - The computer simulation (DFT UTPSSh/6-311++G(d,p)) of the structures and the energy and magnetic characteristics of the binuclear cobalt complexes...     

Synthesis and structure of indoline spiropyrans based on benzo[f]coumarin

Russian Chemical Bulletin - Indoline spiropyrans containing benzo[f]coumarin moiety annulated to the 2H-pyran cycle were synthesized. The obtained compounds exist in solutions as a tautomeric...     

Chromogenic Spiroindolinobenzopyrans of the Oxadiazole Series with Photodriven Ionochromic Properties

New photochromic 8-oxadiazolyl-substituted spirobenzopyran-indolines, which are able to undergo light-controllable cation-induced isomerizations, have been obtained.     

Modulation of diarylethene fluorescence by photochromic switching and solvent polarity

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