Photophysical and photosensitive properties of Elsinochrome A  

作　　者：LI Cong HE Yanping OU Lingcheng TIAN Maojun YAO Zhikun GUO Mengbi 

机构地区：[1]Center for Advanced Studies of Medicinal and Organic Chemistry,Chemical and Material Engineering Institute of Yunnan University,Kunming 650091, China

出　　处：《Chinese Science Bulletin》2006年第9期1050-1054,共5页

基　　金：This research was supported by the National Natural Science Foundation of China （Grant No. 20262007 ） ;the Natural Science Foundation of Yunnan Province （Grant No. 2000C0106M）.

摘　　要：In this paper, the photophysical and photosensitive properties of Elsinochrome A (EA), another member of perylenequinone photosensitizers derived via artificially biological synthesis, were stud- ied by taking hypocrellin A (HA) and hypocrellin B (HB) as the references. It was found that the quantum yield of singlet oxygen produced via the photosensi- tization of EA was 0.98 with HB (0.84) as a reference. Furthermore, the semiquinone anion could be pro- duced via photosensitization of EA in oxygen-free solution. Besides, taking advantage of nanosecond time-resolved spectral technique, the transient triplet absorption spectra and the lifetime of EA in cyclo- hexane were determined by the use of the ground- state depletion method.In this paper, the photophysical and photosensitive properties of Elsinochrome A （EA）, another member of perylenequinone photosensitizers derived via artificially biological synthesis, were studied by taking hypocrellin A （HA） and hypocrellin B （HB） as the references. It was found that the quantum yield of singlet oxygen produced via the photosensitization of EA was 0.98 with HB （0.84） as a reference. Furthermore, the semiquinone anion could be produced via photosensitization of EA in oxygen-free solution. Besides, taking advantage of nanosecond time-resolved spectral technique, the transient triplet absorption spectra and the lifetime of EA in cyclohexane were determined by the use of the groundstate depletion method.

关 键 词：荧光光谱 感光性能 单态氧 吸收光谱 半醌自由基负离子 光敏剂 

分 类 号：TQ57[化学工程—精细化工]