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| Photophysical and photochemical events during the photo sensitization of Hypocrellin A on a colloidal CdS semiconductor | |
| Zhou, ZX; Sun, ZY; Zhang, XK; Zhang, ZY | |
| 2001-10-01 | |
| Source Publication | DYES AND PIGMENTS
 |
| ISSN | 0143-7208 |
| Volume | 51Issue:1Pages:9-14 |
| Abstract | UV-visible spectroscopy, fluorescence quenching measurements, and single-photon counting have been employed to study electron transfer from excited Hypocrellin A (HA) into the conduction band of a colloidal US semiconductor. It has been determined that HA dye adsorbed on colloidal CdS with an apparent association constant of 940 (mol/l)(-1), and fluorescence lifetime measurements gave a rate constant of 5.16 x 10(9) s(-1) for the electron transfer process. The transferred electrons could be used to reduce the substrate 2,2,6,6-tetramethyl-1-piperdinyloxy (TEMPO). In this regard electron paramagnetic resonance spectroscopy was used to study the photoreduction of TEMPO by electrons in the US semiconductor. The results suggested that CdS photoreduction efficiency was enhanced by photosensitization of HA in visible region. (C) 2001 Elsevier Science Ltd. All rights reserved. |
| Keyword | Hypocrellin a Cds Colloidal Semiconductor Fluorescence Quenching Fluorescence Lifetime Epr Tempo Electron Transfer |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000172113400002 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.iccas.ac.cn/handle/121111/76826 |
| Collection | 中国科学院化学研究所 |
| Corresponding Author | Zhang, ZY |
| Affiliation | 1.Acad Sinica, Inst Biophys, Beijing 100101, Peoples R China 2.Acad Sinica, Inst Chem, Beijing 100080, Peoples R China |
| Recommended Citation GB/T 7714 | Zhou, ZX,Sun, ZY,Zhang, XK,et al. Photophysical and photochemical events during the photo sensitization of Hypocrellin A on a colloidal CdS semiconductor[J]. DYES AND PIGMENTS,2001,51(1):9-14. |
| APA | Zhou, ZX,Sun, ZY,Zhang, XK,&Zhang, ZY.(2001).Photophysical and photochemical events during the photo sensitization of Hypocrellin A on a colloidal CdS semiconductor.DYES AND PIGMENTS,51(1),9-14. |
| MLA | Zhou, ZX,et al."Photophysical and photochemical events during the photo sensitization of Hypocrellin A on a colloidal CdS semiconductor".DYES AND PIGMENTS 51.1(2001):9-14. |
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