Study of photoisomerization of polymethine dyes at low temperatures employing pulse laser photolysis

Conclusions Establishing the photostationary equilibrium of the isomers of polymethine dyes under the influence of constant light radiation from a probe lamp at low temperatures makes it possible, by varying the wave-length of the photoexcitation, to record the differential absorption spectra of both the cis- and trans-photoisomers, and to study the kinetic characteristics of the di-cis-photoisomers, which are not observed under ordinary conditions.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 691–695, March, 1978.