Excited-state relaxation of dendrimers functionalized with cyanoazobenzene-type terminal groups

Franckevicius M; Vaisnoras R; Marcos M; Serrano JL; Karpicz R; Gulbinas V

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Excited-state relaxation of dendrimers functionalized with cyanoazobenzene-type terminal groups

机译：氰基偶氮苯型端基官能化的树枝状聚合物的激发态弛豫

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Excited-state relaxation of dendrimers functionalized with terminal cyanoazobenzene-type groups was studied by means of fluorescence and femtosecond transient absorption spectroscopy. We compare the relaxation dynamics with that of azobenzene molecules in solutions and conclude that the excited-state relaxation is determined by the excited state twisting of terminal groups, which takes place on a time scale of several picoseconds. The twisting dynamics only slightly differs in solutions and in solid film, which indicates that conformational motions during the twisting reaction are only weakly coupled to the environment.

机译：通过荧光和飞秒瞬态吸收光谱研究了用末端氰基偶氮苯型基团官能化的树枝状聚合物的激发态弛豫。我们将溶液中的弛豫动力学与偶氮苯分子的弛豫动力学进行了比较，得出的结论是，激发态弛豫是由末端基团的激发态扭曲决定的，扭曲发生在几皮秒的时间范围内。溶液和固体薄膜中的扭转动力学仅略有不同，这表明扭转反应过程中的构象运动仅与环境弱耦合。

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《Chemical Physics Letters》 |2010年第3期|共5页
作者
Franckevicius M; Vaisnoras R; Marcos M; Serrano JL; Karpicz R; Gulbinas V;
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正文语种 eng
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azobenzene; absorption spectroscopy; dynamics;

机译：偶氮苯吸收光谱动力学;

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Excited-state relaxation of dendrimers functionalized with cyanoazobenzene-type terminal groups

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