光异构化
异构化
树枝状大分子
光化学
化学
激发态
双键
准分子
单重态
荧光
高分子化学
催化作用
有机化学
光学
物理
核物理学
作者
Mayuko Uda,Takuo Mizutani,Junpei Hayakawa,Atsuya Momotake,Machiko Ikegami,Ritsuko Nagahata,Tatsuo Arai
标识
DOI:10.1562/0031-8655(2002)076<0596:posdtn>2.0.co;2
摘要
Highly branched stilbene dendrimers were synthesized and their photochemical behavior was studied. Even the stilbene dendrimer with molecular weight over 6500 underwent trans-cis isomerization in the excited singlet state within the lifetime of 10 ns. The photoisomerization of C=C double bond of stilbene dendrimers in the excited state may proceed by a volume-conserving novel mechanism such as hula-twist rather than conventional 180 degrees rotation around the C=C double bond based on fluorescence and isomerization experiments.
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