摘要
利用飞秒时间分辨瞬态荧光光谱仪测量苝四甲酰二亚胺三聚体内的超快荧光淬灭过程.观察到因能量转移而导致的单体荧光的快速衰减,这一过程的时间常数约为0-82ps.
We have reported previously the ultrafast energy transfer process with a time constant of 0.8 ps from a monomeric to a dimeric subunit within a perylenetetracarboxylic diimide trimer, which was derived indirectly from a model fitting into the transient absorption experimental data. Here we present a direct ultrafast fluorescence quenching measurement by employing fs time-resolved transient fluorescence spectroscopy based on noncollinear optical parametric amplification technique. The rapid decay of the monomer's emission due to energy transfer was observed directly with a time constant of about 0.82 ps, in good agreement with the previous result.
基金
This work was supported by the National Natural Science Foundation of China (No.20925313 and No.60438020), the National Basic Research Program of China (No.2009CB929404), and the Chinese Academy of Sciences Innovation Program (KJCX2-YW-W25).
关键词
非共线光参量放人
瞬态荧光
苝四甲酰三亚胺三聚体
人工模拟捕光天线分子
能量转移
Noncollinear optical parametric amplifier, Transient fluorescence, Perylenetetracarboxylic diimide trimer, Artificial antenna molecule, Energy transfer