Synthesis and spectral kinetic study of photoinduced processes of photochromic nitro-substituted indoline and benzothienopyrroline spiropyrans in solutions

摘要

Nitro-substituted benzothienopyrroline spiropyrans containing substituents in the benzothienopyrroline moiety were synthesized. The comparative spectral kinetic study of the photochromic transformations of these compounds and their indoline analogs in solvents of various polarity was carried out. On the basis of the results obtained and literature data, the photoinduced aggregation of molecules of the merocyanine form in weakly polar solvents was suggested.