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Internal twisting dynamics of dicyanovinyljulolidine in polymers

Title
Internal twisting dynamics of dicyanovinyljulolidine in polymers
Authors
Jee A.-Y.Bae E.Lee M.
Ewha Authors
이민영
SCOPUS Author ID
이민영scopus
Issue Date
2009
Journal Title
Journal of Physical Chemistry B
ISSN
1520-6106JCR Link
Citation
vol. 113, no. 52, pp. 16508 - 16512
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The fluorescence quantum yield of 9-dicyanovinyljulolidine (DCVJ) is very low in fluid solutions but increases markedly in solids because the medium rigidity slows down the internal motion, which acts as a major nonradiative decay channel. In this work, the excited-state twisting motion of DCVJ in polymers was investigated by time-resolved fluorescence spectroscopy, and it was observed that the fluorescence lifetime of DCVJ in polymers depends on the mechanical properties of the medium. Therefore, our results indicate that the elastic modulus is a determining factor for molecular rotor dynamics in soft matter, and its description requires a comprehensive visco-elasto-plastic theory. © 2009 American Chemical Society.
DOI
10.1021/jp908430w
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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