| 香豆素343敏化TiO2纳米粒子光致电子转移的荧光和拉曼光谱 |
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| 引用本文： | 蒋礼林,刘伟龙,宋云飞,何兴,王阳,吴红琳,杨延强.香豆素343敏化TiO2纳米粒子光致电子转移的荧光和拉曼光谱[J].物理化学学报,2012,28(12):2953-2957. |
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| 作者姓名： | 蒋礼林 刘伟龙 宋云飞 何兴 王阳 吴红琳 杨延强 |
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| 作者单位： | 1. Centre for the Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, Heilongjiang Province, P. R. China;
2. Department of Physics and Electronics Information Engineering, Hezhou University, Hezhou, 542800, Guangxi Province, P. 1 R. China |
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| 基金项目： | 国家自然科学基金(20973050, 21173063, 21003033);广西自然科学青年基金(2012GXNSFBA053012);广西教育厅科研基金(200103YB140, 200807LX015);中国工程物理研究院科学与技术发展基金(2010B0101001)和冲击波与爆轰物理重点实验室基金(9140C67130208ZS75)资助项目 |
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| 摘 要： | 通过对香豆素343(C343)染料敏化TiO2纳米粒子光致电子转移的荧光和拉曼光谱特性的研究表明,C343染料敏化TiO2纳米粒子稳态吸收光谱和稳态荧光光谱的红移归因于从被吸附的C343染料分子激发态和C343/TiO2复合物到TiO2纳米粒子导带的光致电子转移. 由时间分辨荧光光谱确定了C343染料敏化TiO2纳米粒子的逆向电子转移速率常数为τ1=31 ps. C343 染料敏化TiO2纳米粒子体系拉曼光谱的研究表明, 被吸附在界面处的染料分子主链碳键的伸缩振动和碳环的呼吸运动的振动模式对超快界面光致电子转移有着重要的促进作用.
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| 关 键 词： | C343染料 TiO2纳米粒子 光致电子转移 时间分辨荧光光谱 伸缩振动 |
| 收稿时间： | 2012-07-03 |
| 修稿时间： | 2012-08-31 |
Fluorescence and Raman Spectroscopic Characteristics of the Photo-Induced Electron Transfer of Coumarin 343 Dye-Sensitized TiO2 Nanoparticles |
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| JIANG Li-Lin,LIU Wei-Long,SONG Yun-Fei,HE Xing,WANG Yang,WU Hong-Lin,YANG Yan-Qiang.Fluorescence and Raman Spectroscopic Characteristics of the Photo-Induced Electron Transfer of Coumarin 343 Dye-Sensitized TiO2 Nanoparticles[J].Acta Physico-Chimica Sinica,2012,28(12):2953-2957. |
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| Authors: | JIANG Li-Lin LIU Wei-Long SONG Yun-Fei HE Xing WANG Yang WU Hong-Lin YANG Yan-Qiang |
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| Institution: | 1. Centre for the Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, Heilongjiang Province, P. R. China;
2. Department of Physics and Electronics Information Engineering, Hezhou University, Hezhou, 542800, Guangxi Province, P. 1 R. China |
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| Abstract: | The fluorescence and Raman spectroscopic characteristics of the photo-induced electron transfer of Coumarin 343 (C343) dye-sensitized TiO2 nanoparticles have been investigated. The results indicate that the red-shift of the absorption spectrum peaks and the fluorescence spectrum maxima can be attributed to the photo-induced electron transfer from the excited state of the absorbed C343 dye molecules and the charge transfer complex (C343/TiO2) to the conduction band manifold of the TiO2 nanoparticles. Back electron transfer of the system was investigated by time resolved fluorescence spectroscopy and takes place in around τ1=31 ps. Raman spectroscopy of the C343 dye-sensitized TiO2 nanoparticles reveals that the carbon bond stretching vibrations and ring breathing motions of the absorbed C343 dye molecules at the interface significantly contribute to the ultrafast interface photoinduced electron transfer. |
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| Keywords: | C343 dye 2 nanoparticle'' '''') TiO2 nanoparticle" target="_blank">">TiO2 nanoparticle Photo-induced electron transfer Time-resolved fluorescence spectroscopy Stretching vibration |
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