期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
卷 209, 期 2-3, 页码 219-223出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2009.11.018
关键词
Coumarin; Dimer; Quantum yield; Photodimerization; Photocleavage; Sensitizer; CO2-formation
The cleavage of four coumarin dimers, the syn-head-to-tail (ht) dimer of parent coumarin (syn-ht-CC1), the anti- and syn-hh dimers of 6-methylcoumarin (anti-hh-CC2 and syn-hh-CC2, respectively) and the anti-hh dimer of 6-dodecylcoumarin (anti-hh-CC3), was studied by UV-vis and IR spectroscopy and HPLC upon direct 254 nm irradiation as well as sensitized excitation. The quantum yield of dinner splitting is Phi(sp) = 0.1-0.3 in various solvents and the effects of structure and solvent polarity are small. In certain solvents some of the dimers produced CO2 along with the monomers in the splitting reaction. Electron transfer from dinners to the triplet state of sensitizers, such as benzophenone or 9,10-anthraquinone, was observed in acetonitrile. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据