| 荧光素衍生物在TiO_2胶体中的光物理性质研究 |
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| 引用本文： | 张海平,周亚琳,张曼华,沈涛,李玉良,朱道本. 荧光素衍生物在TiO_2胶体中的光物理性质研究[J]. 化学学报, 2002, 60(9): 1581-1585 |
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| 作者姓名： | 张海平 周亚琳 张曼华 沈涛 李玉良 朱道本 |
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| 作者单位： | 中国科学院化学研究所分子科学中心.北京(100080) |
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| 基金项目： | 国家自然科学基金 (No .5 0 0 730 2 5 )资助项目 |
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| 摘 要： | 测定了以荧光素为光敏剂的电子给体-受体二元化合物荧光素蒽醌甲酯（FL- AQ）及模型化合物荧光素丁酯（FL4）在溶液中和在二氧化钛（TiO_2）胶体中的吸 收光谱、荧光光谱、荧光寿命等。发现荧光素蒽醌甲酯与荧光素丁酯均可通过酚羟 基较好地吸附在TiO_2胶体上。从吸收光谱可得，FL4与TiO_2形成表面络合物的表 观结合常数（K_(app)）大约为3590 mol~(-1)·L，结合率（α）为0.86；FL-AQ与 TiO_2形成表面络合物的K_(app)大约为3060 mol~(-1)·L，α为0.84。同时通过 ESR光谱讨论了光诱导电子注入机制。
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| 关 键 词： | 荧光素 二氧化钛 胶体 电子自旋共振 光诱导 |
| 修稿时间： | 2001-12-31 |
Photophysical Properties of Fluorescein Derivatives on TiO_2 Colloid |
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| ZHANG,Hai-Ping ZHOU,Ya-Lin ZHANG,Man-Hua SHEN,Tao LI,Yu-Liang ZHU,Dao-Ben. Photophysical Properties of Fluorescein Derivatives on TiO_2 Colloid[J]. Acta Chimica Sinica, 2002, 60(9): 1581-1585 |
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| Authors: | ZHANG Hai-Ping ZHOU Ya-Lin ZHANG Man-Hua SHEN Tao LI Yu-Liang ZHU Dao-Ben |
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| Affiliation: | Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences.Beijing(100080) |
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| Abstract: | The interactions of the model compound (FL4) or diad (FL-AQ) composed of fluorescein and 2-methyl-anthraquinone and TiO_2 colloid have been examined by absorption, fluorescence spectroscopy and fluorescence lifetime. This diad (FL-AQ) or model compound (FL4) is adsorbed on TiO_2 colloid through the phenolic function of the fluorescein moiety. The apparent association constant (K_(app)) of FL4/TiO_2 obtained from the absorption spectra is ca. 3590 mol~(-1)·L. The K_(app) of FL-AQ/TiO_2 is ca. 3060 mol~(-1)·L. The degree of association (α) between TiO_2 and FL4 is ca. 0.86. The degree of association (α) between TiO_2 and FL-AQ is ca. 0.84. The mechanism of the photoinduced electron injection was also discussed through ESR spectra. |
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| Keywords: | fluorescein derivatives TiO 2 colloid photoinduced electron injection ESR spectra |
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