Photoluminescence and photoluminescence excitation spectra of poly(di-n-hexylsilane) (PDHS) embedded in nanoporous silica material SB A-15 with a pore diameter of 10 nm were analyzed at different temperatures ranging from S to 320 K. The optical spectra of this composite are structured containing three bands, attributed to different structural forms of the polymer coexisting in a restricted pore volume: the polymer chains in the trans and gauche conformations, and their aggregates. Different structural forms are spatially separated and weakly coupled; therefore, several bands are distinguished in the photoluminescence spectra at low temperatures when several forms coexist. For the first time two termochromic transitions of nanosize PDHS were observed at about 265 and 320 K for a single polymer chain and for aggregates, respectively.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films