Effect of disorder on the optical spectra of polygermane films and nanocomposites

N. Ostapenko, N. Kozlova, Shozo Suto, M. Nanjo, K. Mochida

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The fluorescence and fluorescence excitation spectra, as well as the absorption spectra of a poly(di-n-hexylgermane) film and a nano-sized polymer confined into nanopores of SBA-15 with pore diameters of 6 and 10nm, were measured in the temperature range from 5 to 250K. The observed data were compared with those obtained for poly(di-n-hexylsilane). The optical spectra of nano-sized poly(di-n-hexylgermane) differ significantly from those of a bulk film and depend on the pore diameters. These spectra correspond to the polymer chains with even less ordered segments and interchain aggregates. This is confirmed by the absence of the thermochromic transition in the composites contrary to the film. The poly(di-n-hexylgermane) polymer chain conformation in the restricted pore volume becomes disordered with a decrease of the nanopore size from 10 to 6nm.

Original languageEnglish
JournalMolecular crystals and liquid crystals
Volume497
DOIs
Publication statusPublished - 2008 Dec 22

Keywords

  • Films
  • Mesoporous silica
  • Nanocomposites
  • Optical spectra
  • Poly(di-n- hexylgermane)
  • Poly(di-n-hexylsilane)

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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