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Photo-Induced Intermolecular Electron Transfer-E ect of Acceptor Molecular Structures
Wei Zhang,Xiao-song Liu,Lin Yan,Gang-bei Zhu,Zan-hao Wang,Yan-qiang Yang*
Author NameAffiliationE-mail
Wei Zhang Department of Physics, Harbin institute of Technology, Harbin 150001, China  
Xiao-song Liu Department of Physics, Harbin institute of Technology, Harbin 150001, China  
Lin Yan Department of Physics, Harbin institute of Technology, Harbin 150001, China  
Gang-bei Zhu National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, China  
Zan-hao Wang Department of Physics, Harbin institute of Technology, Harbin 150001, China  
Yan-qiang Yang* Department of Physics, Harbin institute of Technology, Harbin 150001, ChinaNational Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, China yqyang@hit.edu.cn 
Abstract:
Photo-induced electron transfer versus molecular structure of acceptors is investigated using ultrafast time-resolved transient grating spectroscopy. Typical laser dyes Rhodamine 101 (Rh101) and Rhodamine 6G (Rh6G) in electron donor solvent—aniline are adopted as the objects. The forward electron transfer time constant from aniline to the excited singlet state of two Rhodamine dyes and subsequent back electron transfer from two dyes to aniline are measured. The experimental results denote that Rh6G presents faster electron transfer rates with aniline in both forward electron transfer and back electron transfer processes. With chemical calculation and qualitative analysis, it is found that the flexible molecular geometry of Rh6G leads to stronger electron coupling with donor solvent and further gives rise to larger electron transfer rates.
Key words:  Electron transfer, Molecular structure, Back electron transfer
FundProject:
光致分子间电子转移-受体分子结构对转移速率的影响
张 伟,刘小嵩,颜 林,朱刚贝,王赞浩,杨延强*
摘要:
本文利用超快时间分辨瞬态光栅光谱技术研究了受体分子结构对光致分子间电子转移速率的影响,以罗丹明101和罗丹明6G在苯胺中的溶液作为研究样品. 苯胺到两种染料分子之间的前向电子转移时间常数以及后续的从染料分子到苯胺的反向电子转移时间常数可以被测得. 结果表明无论是前向电子转移还是反向电子转移,罗丹明6G都较罗丹明101进行得更快. 通过量子化学计算以及后续分析,发现更具柔性的罗丹明6G分子和苯胺之间具有更强的分子间电子耦合从而导致更大的分子间电子转移速率.
关键词:  电子转移,分子结构,反向电子转移
DOI:10.1063/1674-0068/31/cjcp1807171
分类号: