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Determination of Astaxanthin and Canthaxanthin Triplet Properties in Different Polarities of the Solvent by Laser Flash Photolysis

✍ Scribed by Haixia Li; Peng Zhang; Xiyu Song; Wenfeng Wang

Publisher: John Wiley and Sons
Year: 2011
Tongue: English
Weight: 115 KB
Volume: 29
Category: Article
ISSN: 0256-7660
DOI: 10.1002/cjoc.201180276

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✦ Synopsis

L•mol -1 •s

-1 in benzene. The bimolecular rate constants of energy transfer from triplet excited 2-acetonaphthone to carotenoids were determined from the linear regression of the decay rate constant of 2-acetonaphthone triplet at varying carotenoid concentrations. The triplet lifetimes of 3 AST* and 3 CAN* in different solvents were also determined. The results indicated that triplet energy transfer was nearly diffusion-controlled.

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Transient absorption spectra (trIplet-trlpltt) of anthracene are observed in the vapor phase, poIar and non-polar solvents, aad polymethylmethacrylate matrlces at room temperatire. The results are compared with those of previous observations (smglet-stnglet), after estimating the change m poIarIzabi