1. Enhancement of photoisomerization of polymethine dyes in complexes with biomacromolecules
- Author
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Tatikolov, Alexander S., Akimkin, Timofei M., Pronkin, Pavel G., and Yarmoluk, Sergiy M.
- Subjects
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PHOTOISOMERIZATION , *POLYMETHINES , *DYES & dyeing , *COMPLEX compounds , *BIOMOLECULES , *PHOTOCHEMISTRY , *CHONDROITIN sulfates , *FLASH photolysis - Abstract
Abstract: Photochemical processes (photoisomerization and generation of the triplet state) of the thiacarbocyanine dyes 3,3′,9-trimethylthiacarbocyanine iodide (Cyan 2), 3,3′-diethyl-9-methylthiacarbocyanine iodide (DMTC), and 3,3′,9-triethylthiacarbocyanine iodide (TETC) in complexes with biomacromolecules—DNA and chondroitin-4-sulfate—were studied by flash photolysis. It has been shown that, along with generation of the triplet state, enhancement of the photoisomer formation is observed for Cyan 2 and DMTC complexed with the biomolecules. This effect can be explained by the influence of the biopolymer matrix on the potential energy curves of the photoisomerization process. [Copyright &y& Elsevier]
- Published
- 2013
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