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6644678 
Journal Article 
PHOTOCHROME CONVERSIONS OF A COPOLYMER OF STYRENE WITH INDOLINOSPIROPYRAN 
Merkulov, EI; Vannikov, AV; Chernov, GM; Arsenov, VD; Ermakova, VD; Cherkashin, MI; Kisilitsa, PP; , 
1975 
1 
Bulletin of the Academy of Sciences of the USSR. Division of Chemical Science
ISSN: 0568-5230 
PLENUM PUBL CORP 
NEW YORK 
24 
11 
2374-2377 
English 
WOS:A1975BW95400020 
1. In the pulsed photoexcitation of a solution of a copolymer of indolinospiropyran with styrene, various stereoisomers of the merocyanine form are formed. 2. The proposed scheme of photoconversions of the copolymer includes a step of formation of a cis-cisoid isomer (∼490 nm), which is rapidly converted to three interconvertible stereoisomers with maximum of the absorption bands at ∼560, ∼600, and ∼640 nm. 3. The kinetics of dark bleaching at a time >0.1 sec is determined by the decrease in the optical density of the most stable isomer with λmax ≈ 600 nm. © 1976 Plenum Publishing Corporation.