Journal of the American Chemical Society p. 850 - 854 (1993)
Update date:2022-08-29
Topics:
Hartzfeld, Donna G.
Rose, Seth D.
Photosensitized pyrimidine dimer splitting by a covalently linked methoxybenzene exhibited a strong solvent dependence. Fluorescence of the chromophore was quenched by the attached dimer, which was indicative of electron transfer from excited chromophore to dimer. The quantum efficiency of splitting of the dimer radical anion in the linked dimer?--chromophore?+ was calculated from the observed quantum yields of splitting and the degree of fluorescence quenching. The quantum efficiency of dimer radical anion splitting was remarkably dependent on solvent polarity, ranging from 0.05 in water to ~0.5 in low polarity solvent mixtures (e.g., heptane/1,4-dioxane, 95:5). The results were rationalized in terms of competition of splitting and back electron transfer within the charge-separated species. The latter pathway may be slowed due to its exergonicity in low polarity media, in accord with Marcus inverted behavior. Photolyases may be effective for splitting dimers by providing catalytic groups and a medium in which both dimer radical anion formation and splitting are efficient.
View MoreJinan Trio PharmaTech Co., Ltd
Contact:86-531-88811783;+(0)13153010282
Address:2766 Yingxiu Road, Jinan High-Tech Zone, China
NINGBO PANGS CHEM INT’L CO.,LTD.
Contact:+86-574-27666845
Address:FLOOR 21,BUILDING NO.11,XIN TIAN DI,NO.689 SHI JI ROAD,NINGBO CHINA
Xi'an yuanfar international trade company
website:https://www.yuanfarchemical.com
Contact:86-029-88745613 ext 828
Address:Floor19th ,B Building, Oak Block,No.36 South Fenghui Road, Dev. Zone of High-Tech Ind.,Xi’an, China
Zhejiang Kangfeng Chemical Co.,LTD.
Contact:+86-579-86709687
Address:Xueshizhai Industrial Zone, Weishan Town,Dongyang City, Zhejiang Province ,China
Tianjin Tongde Biological Technology Co., Ltd.
Contact:86-22-23309138
Address:Room 402, bulidingE3 Detection certification park, XiQingDistrict, Tianjin City
Doi:10.1016/S0040-4039(00)71194-4
(1980)Doi:10.1021/ja01146a061
(1951)Doi:10.1039/DT9860000039
(1986)Doi:10.1139/v96-176
(1996)Doi:10.1002/anie.201001686
(2010)Doi:10.1271/bbb.100804
(2011)