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Molecular rotor dynamics influenced by the elastic modulus of polyethylene nanocomposites

Title
Molecular rotor dynamics influenced by the elastic modulus of polyethylene nanocomposites
Authors
Jee A.-Y.Kwon H.Lee M.
Ewha Authors
이민영
SCOPUS Author ID
이민영scopus
Issue Date
2009
Journal Title
Journal of Chemical Physics
ISSN
0021-9606JCR Link
Citation
vol. 131, no. 17
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We observed that the excited-state twisting motion of 3, 3′ -diethyloxacarbocyanine in polymer nanocomposites (PNCs) depends strongly on the elastic modulus of medium. PNCs consist of low density polyethylene dispersed with surface-functionalized nanodiamonds with various alkyl groups. The mechanical properties of the PNCs were measured by a nanoindentation method, and the photoisomerization processes of the cyanine dye doped in the composites were investigated by time-resolved fluorescence spectroscopy. It was found that the molecular rotor dynamics in rigid media should be quantitatively describable by the elastic modulus of polymer. © 2009 American Institute of Physics.
DOI
10.1063/1.3261730
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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