TY - JOUR
T1 - The optical spectra of confined polygermanes
T2 - 8th International Conference on Excitonic Processes in Condensed Matter, EXCON'08
AU - Ostapenko, Nina
AU - Kozlova, Nata
AU - Nanjo, Masato
AU - Mochida, Kunio
AU - Suto, Shozo
N1 - Funding Information:
The research was supported by a programme grant from the Swedish Council for Social Research to Dr. Rönnberg, and by grants to Dr. Risberg from the Medical Research Council and The Council for Research in the Humanities and Social Sciences. The constructive and positive comments by two anonymous reviewers are greatly acknowledged.
PY - 2009
Y1 - 2009
N2 - The monitoring of poly(di-n-hexylgermane) (PDHG) optical spectra in a variety of structures ranging from a polymer film to nanosize polymer filled porous media was performed by optical spectroscopy in the temperature range from 5 to 250 K. The PDHG nanocomposites were fabricated by insertion of PDHG polymers into SBA-15 mesoporous silica and SiO2 porous films. Temperature dependence of the PDHG film fluorescence spectra shows that the polymer generally has disordered conformation while the random ordered segments behave as defects. The spectra of the composites correspond to the polymer chains with even less ordered segments and the aggregates of such chains. This is confirmed by the absence of the thermochromic transition in the composites contrary to the film. The difference between the optical spectra of the film and the composites is due to a decrease of both the intermolecular and exciton-phonon interactions in the composites. It was shown that the polymer chains in the SiO2 pores are more ordered.
AB - The monitoring of poly(di-n-hexylgermane) (PDHG) optical spectra in a variety of structures ranging from a polymer film to nanosize polymer filled porous media was performed by optical spectroscopy in the temperature range from 5 to 250 K. The PDHG nanocomposites were fabricated by insertion of PDHG polymers into SBA-15 mesoporous silica and SiO2 porous films. Temperature dependence of the PDHG film fluorescence spectra shows that the polymer generally has disordered conformation while the random ordered segments behave as defects. The spectra of the composites correspond to the polymer chains with even less ordered segments and the aggregates of such chains. This is confirmed by the absence of the thermochromic transition in the composites contrary to the film. The difference between the optical spectra of the film and the composites is due to a decrease of both the intermolecular and exciton-phonon interactions in the composites. It was shown that the polymer chains in the SiO2 pores are more ordered.
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U2 - 10.1002/pssc.200879883
DO - 10.1002/pssc.200879883
M3 - Conference article
AN - SCOPUS:63449098911
VL - 6
SP - 73
EP - 76
JO - Physica Status Solidi C: Conferences
JF - Physica Status Solidi C: Conferences
SN - 1862-6351
IS - 1
Y2 - 22 June 2008 through 27 June 2008
ER -