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Photoisomerisierung und Relaxation symmetrischer Triazacarbocyanine in einem Alkoholgemisch
Author(s) -
Balli Heinz,
Eichenberger Thomas,
Hellrung Bruno,
Scheibli Peter
Publication year - 1985
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19850680531
Subject(s) - chemistry , photobleaching , protonation , photoisomerization , relaxation (psychology) , photochemistry , kinetic energy , computational chemistry , fluorescence , organic chemistry , isomerization , catalysis , ion , social psychology , psychology , physics , quantum mechanics
Photoisomerization and Relaxation of Symmetrical Triazacarbocyanine Dyes in an Alcoholic Mixture at Low Temperature The partial photobleaching of a series of symmetrical triazacarbocyanine dyes with different heterocycles in EtOH/MeOH/i‐PrOH at low temperature (110 to 250 K) was investigated by UV/VIS spectra. Kinetic data of the dark reaction of photobleached compounds are given. The effect of electron‐donating or ‐accepting substituents, respectively, and of protonation of the photobleached compound on kinetic data and on UV/VIS spectra was studied. Products of photobleaching and mechanisms of the dark reaction are discussed.