title: Fluorescence relaxation kinetics of poly(methylphenylsilane) film and nanocomposites.
abstract: A comparative study of fluorescence relaxation kinetics of σ-conjugated poly(methylphenylsilane) (PMPS) polymer film and nanocomposites has been performed by ultrafast time-gated fluorescence measurements at various temperatures. Investigations have revealed a fine structure of excitonic σ-σ* band. We attribute this structure to emission from two spatially independent states with different ordering of the polymer chain segments, type gauche and trans conformations. In contrary to a more ordered polymer poly(di-n-hexylsilane), no clear thermochromic transition has been detected in PMPS film; however, the trans band intensity increases with temperature and with excitation wavelength, but it is absent when polymer is incorporated into nanopores of small diameter.
authors.affiliation: Institute of Physics of NASU, pr. Nauki 46, Kiev, 03028, Ukraine.
authors.forename: N
authors.initials: N
authors.lastname: Ostapenko
authors.affiliation: Center for Physical Sciences and Technology, Savanoriu 231, Vilnius, Lithuania.
authors.forename: V
authors.initials: V
authors.lastname: Gulbinas
authors.affiliation: Center for Physical Sciences and Technology, Savanoriu 231, Vilnius, Lithuania.
authors.forename: R
authors.initials: R
authors.lastname: Augulis
authors.affiliation: Institute of Physics of NASU, pr. Nauki 46, Kiev, 03028, Ukraine.|Center for Physical Sciences and Technology, Savanoriu 231, Vilnius, Lithuania.
authors.forename: A
authors.initials: A
authors.lastname: Boiko
authors.affiliation: National Technical University "Kyiv Polytechnic Institute", Pr. Peremohy 37, Kyiv, 03056, Ukraine. afina55@ukr.net.
authors.forename: M
authors.initials: M
authors.lastname: Chursanova
authors.affiliation: National Technical University "Kyiv Polytechnic Institute", Pr. Peremohy 37, Kyiv, 03056, Ukraine.
authors.forename: A
authors.initials: A
authors.lastname: Volkov
authors.affiliation: Institute of Physical Chemistry NASU, Pr. Nauky 31, 03039, Kyiv, Ukraine.
authors.forename: G
authors.initials: G
authors.lastname: Telbiz