資料載入中.....
|
請使用永久網址來引用或連結此文件:
http://ir.ncue.edu.tw/ir/handle/987654321/15465
|
題名: | Relaxation Dynamics of Ruthenium Complexes in Solution, PMMA and TiO2 Films: The Roles of Self-Quenching and Interfacial Electron Transfer |
作者: | Chang, Chih-Wei;Chou, Chung-Kuang;Chang, I-Jy;Lee, Yuan-Pern;Diau, Eric Wei-Guang |
貢獻者: | 化學系 |
日期: | 2007-08
|
上傳時間: | 2013-02-05T02:21:17Z
|
出版者: | American Chemical Society |
摘要: | The relaxation dynamics of two transition-metal complexes, [Ru(bpy)3]2+ and [Ru(bpy)3(mcbpy)]2+, in ethanol solution and in poly(methyl methacrylate) (PMMA) and TiO2 films have been investigated with time-resolved emission and femtosecond transient absorption spectroscopy. The emission lifetime of a degassed [Ru(bpy)3]2+ solution in ethanol was determined to be 700 ns; to describe the self-quenching kinetics due to aggregation, three decay coefficients, 5.3, 70, and 220 ns, were obtained for the [Ru(bpy)3]2+/PMMA film. The electron transfer through space in a [Ru(bpy)3]2+/TiO2 film competed with intrinsic intersystem crossing (100 fs) and vibrational relaxation (6 ps) in solid films. For the [Ru(bpy)2(mcbpy)]2+/TiO2 film, although the relaxation for electron transfer through bonds was more rapid than electron transfer through space, both processes occur on similar time scales. Through femtosecond transient absorption measurements, we provide important dynamical evidence for the interfacial electron transfer in both forward and backward directions. We conclude that in dye-sensitized solar-cell applications processes for interfacial electron transfer are significant not only through bonds but also through space. |
關聯: | J. Phys. Chem. C, 111(35): 13288-13296 |
顯示於類別: | [化學系] 期刊論文
|
文件中的檔案:
檔案 |
大小 | 格式 | 瀏覽次數 |
index.html | 0Kb | HTML | 567 | 檢視/開啟 |
|
在NCUEIR中所有的資料項目都受到原著作權保護.
|