Photoisomerization of Stilbene Dendrimers: The Need for a Volume-conserving Isomerization Mechanism¶
- 1 May 2007
- journal article
- Published by American Society for Photobiology in Photochemistry and Photobiology
- Vol. 76 (6) , 596-605
- https://doi.org/10.1562/0031-8655(2002)0760596posdtn2.0.co2
Abstract
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° rotation around the C=C double bond based on fluorescence and isomerization experiments.Keywords
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