Coexistence of different conformer forms in nanosize poly(di-n-hexylsilane)

A. Dementjev; V. Gulbinas; L. Valkunas; N. Ostapenko; S. Suto; A. Watanabe

doi:10.1021/jp0661239

Coexistence of different conformer forms in nanosize poly(di-n-hexylsilane)

A. Dementjev, V. Gulbinas, L. Valkunas, N. Ostapenko, S. Suto, A. Watanabe

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	4717-4721
Number of pages	5
Journal	Journal of Physical Chemistry C
Volume	111
Issue number	12
DOIs	https://doi.org/10.1021/jp0661239
Publication status	Published - 2007 Mar 29

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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abstract = "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.",

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T1 - Coexistence of different conformer forms in nanosize poly(di-n-hexylsilane)

AU - Dementjev, A.

AU - Gulbinas, V.

AU - Valkunas, L.

AU - Ostapenko, N.

AU - Suto, S.

AU - Watanabe, A.

PY - 2007/3/29

Y1 - 2007/3/29

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AB - 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.

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