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Effect of Energy Transfer on UV Spectra of “H-shaped” Azobenzene Derivatives
Hui-sheng Li*1, Lu Lu2
1.School of Chemical Engineering and Food Science, Xiangfan University, Xiangfan 441053, China;2.Department of Physics, Wuhan University, Wuhan 430072, China
Abstract:
A series of “H-shaped” organic dimers (azobenzene derivatives) exhibit linear absorption red shift compared with their corresponding monomers experimentally. Dipolar interaction model is not appropriate for the azobenzene derivatives due to the small distance between two “D-π-A” chains. Energy transfer model is suggested for explanation of the absorption red shift. Two necessary conditions for energy transfer were verified. In addition, bi-exponential florescence-delay behavior of the dimer as well as Bella's quantum chemistry calculation shows evidence of energy transfer.
Key words:  Energy transfer, Dipolar interaction model, H-aggregation, Red shift
FundProject:
Effect of Energy Transfer on UV Spectra of “H-shaped” Azobenzene Derivatives
李辉升*1, 路璐2
1.襄樊学院化学工程与食品科学学院,襄樊441053;2.武汉大学物理科学与技术学院,武汉430072
摘要:
实验中发现“H-型”系列偶氮苯双体同其单体相比呈现吸收峰红移的特性. 通过能量转移模型合理解释了吸收峰的红移,并验证能量转移的两个必要条件. 另外,荧光寿命的双指数特性以及Bella的量子化学理论都证实了能量转移的存在.
关键词:  能量转移,偶极相互作用模型,H-型聚集,吸收光谱,红移
DOI:10.1088/1674-0068/23/02/145-148
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