N. I. Ostapenko

Publications (1)0.51 Total impact

• Article: Spectral properties of organosilicon polymer/SiO2 porous film nanocomposite films

  N. I. Ostapenko, N. V. Kozlova, E. K. Frolova, Yu. V. Ostapenko, D. Peckus, V. Gulbinas, A. M. Eremenko, N. P. Smirnova, N. I. Surovtseva, S. Suto, A. Watanabe
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  ABSTRACT: Nanocomposite films based on an organosilicon polymer, poly(di-n-hexylsilane) (PDHS), introduced into SiO2 film pores were prepared by a method developed herein. The dependences of optical spectra of the composites on both the polymer concentration within the porous silica films and temperature variations in the range 15–310 K have been studied. A comparison of spectra of the prepared films and PDHS/SBA-15 porous silica nanocomposites that were studied previously revealed the coexistence in the films of three spatially independent polymer photoluminescence centers corresponding to isolated polymer chains in trans- and gaucheconformations and their aggregates. The strongest band in the photoluminescence spectrum of the nanocomposite films belongs to PDHS aggregates. Its intensity exhibits an extraordinary increase as the temperature rises from 260 K to 310 K. This is supposedly associated with the additional formation of aggregates during the trans×gauche thermochromic transition. Keywordsnanocomposites–poly(di-n-hexylsilane)–SiO2 mesoporous films–optical spectra
  Journal of Applied Spectroscopy 05/2012; 78(1):75-80. · 0.51 Impact Factor