Remarkable change in fluorescence emission of poly(diphenylacetylene) film via in situ desilylation reaction: Correlation with variations in microporous structure, chain conformation, and lamellar layer distance

Wang Eun Lee, Dong Cheul Han, Dong Hee Han, Heung Jin Choi, Toshikazu Sakaguchi, Chang Lyoul Lee, Giseop Kwak

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Fluorescence (FL) emission properties, microporous structures, energy-minimized chain conformations, and lamellar layer structures of the silicon-containing poly(diphenylacetylene) derivative of p-PTMSDPA before and after desilylation were investigated. The nitrogen-adsorption isotherms of p-PTMSDPA film before and after desilylation were typical of type I, indicating microporous structures. The BET surface area and pore volume of the p-PTMSDPA film were significantly reduced after the desilylation reaction, simultaneously, its FL emission intensity remarkably decreased. The theoretical calculation on both model compounds of p-PTMSDPA and its desilylated polymer, PDPA, showed a remarkable difference in chain conformation: The side phenyl rings of p-PTMSDPA are discontinuously arranged in a zig-zag pattern, while the PDPA is continuously coiled in a helical manner. The lamellar layer distance (LLD) in the p-PTMSDPA film significantly decreased after the desilylation reaction. Desilylation of the silicon-containing poly(diphenylacetylene) in situ in film induced remarkable changes in fluorescence emission property, microporous structure, chain conformation, and lamellar layer structure.

Original languageEnglish
Pages (from-to)1047-1051
Number of pages5
JournalMacromolecular Rapid Communications
Volume32
Issue number14
DOIs
StatePublished - 15 Jul 2011

Keywords

  • chain conformation
  • desilylation
  • fluorescence
  • lamellar
  • microporosity
  • poly(diphenylacetylene)

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