Abstract
Abstract The excited states decay channels of the molecules suffering the cis — trans photoisomerization have been investigated using picosecond absorption spectroscopy. Transient absorption spectra of arylethylenes (AE) (molecular solution and the super-cooled liquid microspheres) and thioindigo dyes (TD) (solution) were assigned. The singlet mechanism for AE and the triplet mechanism for TD isomerization were proposed. The cis isomers kinetic behavior was interpreted in terms of the Plotnikov — Mayer mechanism of the radiationless processes induced by the photochemical reactions.
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