Optical spectra of polygermane/mesoporous silica nanocomposites

Nina Ostapenko, Nata Kozlova, Shozo Suto, Masato Nanjo, Kunio Mochida

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The monitoring of poly(di-n-hexylgermane) (PDHG) optical spectra in a variety of structures ranging from a bulk film to a nanosize polymer confined into a nanopore of SBA-15 was performed using the fluorescence and fluorescence excitation spectra in the temperature range from 5 to 240 K as well as the absorption and FTIR spectra at room temperature. The observed data were compared with those obtained for poly(di-n-hexylsilane). It was shown that PDHG film absorption and fluorescence spectra strongly depend on the polymer thickness and consist of a number of bands which were assigned to centers with different amount of trans- and gauche- conformers of the polymer chains. Conformations of the polymer chains found in a thin film and in a 10 nm pore are similar while differing from the conformations of a thick film. Optical spectra of the confined PDHG are blue-shifted relative to those of a thin film. The PDHG polymer chain conformation becomes disordered with the decrease of the polymer film thickness and the nanopore size from 10 to 6 nm.

Original languageEnglish
Pages (from-to)148-155
Number of pages8
JournalMacromolecular Symposia
Volume265
Issue number1
DOIs
Publication statusPublished - 2008 May 1

Keywords

  • Films
  • Nanocomposltes
  • Optical spectra
  • Poly(di-n-hexylgermane)
  • SBA-15

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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  • Cite this

    Ostapenko, N., Kozlova, N., Suto, S., Nanjo, M., & Mochida, K. (2008). Optical spectra of polygermane/mesoporous silica nanocomposites. Macromolecular Symposia, 265(1), 148-155. https://doi.org/10.1002/masy.200850516