Photoisomerization of azobenzene probes tagged to polystyrene in thin films

Keiji Tanaka, Yohei Tateishi, Toshihiko Nagamura

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15 Citations (Scopus)

Abstract

The photoisomerization kinetics of azobenzene (Az) chromophores tagged to polystyrene (PS) in thin films, was analyzed. It was observed that absorbance monotonically increased with decreasing wavelength, even though the Az probes were not present in the film. To confirm whether the presence of the surface layer truly accelerates the trans to cis photoisomerization, a 160 nm thick film of PS was put onto the PS-Az film with the thickness of 40 nm. The bilayer's x value decreased to 0.67 ∓ 0.01 because of the interfacial region was composed of the two original surfaces. The results show that surface region dynamically behaves as liquid for the photoinduced trans to cis isomerization of the Az probes.

Original languageEnglish
Pages (from-to)8188-8190
Number of pages3
JournalMacromolecules
Volume37
Issue number22
DOIs
Publication statusPublished - Nov 2 2004

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All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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