Abstract
We present a study of fluorescence (5-250)K and FTIR spectra of poly(di-n-hexylsilane) incorporated into nanoporous silicas (MCM-41 and SBA-15 types) and SiO2 aerosil. It is shown that the essential local conformation change of the polymer chain occurs only for the polymer embedded into and oriented in small-diameter pores with a large number of Si-OH groups on the surface of the walls. The competition between the polymer-surface and the polymer-polymer interactions leads to the restructuring of a polymer incorporated into the large pores of SBA-15 where the separarate polymer chain having trans- and gauche-conformations as well as the aggregates can be found. The presence of the gauche-conformation is confirmed by the shift of CHa2 and CHs2 stretching vibrations and, additionally, by the redistrubution of their intensity with increasing the pore diameter.
Original language | English |
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Pages (from-to) | 8944-8948 |
Number of pages | 5 |
Journal | Thin Solid Films |
Volume | 516 |
Issue number | 24 |
DOIs | |
Publication status | Published - 2008 Oct 31 |
Externally published | Yes |
Keywords
- Fluorescence and Fourie Transform Infrared (FTIR) spectra
- Nanoporous silicas
- Nanosized poly(di-n-hexylsilane)
- SiO aerosil
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry