Intramolecular directional energy transfer processes in dendrimers containing perylene and terrylene chromophores
Intramolecular directional energy transfer processes in dendrimers containing perylene and terrylene chromophores
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含有苝和三萘嵌苯发色团的树枝状聚合物中的分子内定向能量转移过程
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
F. Schryver
中科院分区：
文献类型：
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作者：
G. Schweitzer;R. Gronheid;S. Jordens;M. Lor;G. Belder;T. Weil;E. Reuther;K. Müllen;F. Schryver
利用飞秒荧光上转换和单光子计时技术研究了第一代和第二代树枝状大分子的时间分辨荧光动力学，其中在边缘处具有苝酰亚胺发色团，在核心处具有三苯撑二酰亚胺发色团。通过对λem在540 ~ 780 nm范围内的广泛数据集的全局分析，结合两种技术并比较以前对苝酰亚胺和三萘嵌苯二酰亚胺参比化合物获得的动力学结果，可以确定两个独立的能量转移过程。第一代树枝状聚合物的时间常数分别为4和25 ps，第二代树枝状聚合物的时间常数分别为22和68 ps。它们的规模如预期的福斯特能量转移过程之间的发色团在存在于树枝状聚合物的距离。这些过程中的每一个都可能与样品中存在的不同异构体有关。在海湾地区取代的terrylenedimide模型化合物的分析揭示了分子的子集显示…
The time-resolved fluorescence kinetics of a first and a second generation dendrimer with peryleneimide chromophores at the rim and a terrylenediimide chromophore in the core were investigated using femtosecond fluorescence upconversion and single photon timing techniques. By global analysis of an extentensive data set with λem ranging from 540 to 780 nm, combining both techniques and comparing the kinetic results obtained previously for peryleneimide and terrylenediimide reference compounds, two independent energy transfer processes could be identified. The time constants were 4 and 25 ps for the first generation dendrimer and 22 and 68 ps for the second generation, respectively. They scale as expected for Forster energy transfer processes between chromophores at the distances present in the dendrimers. Each of these processes can possibly be related to different isomers present in the samples. Analysis of the in-the-bay area substituted terrylenediimide model compound reveals subsets of molecules showin...