Conformation change of nanosized silicon-organic polymer oriented into ordered nanoporous silicas

N. Ostapenko; G. Dovbeshko; N. Kozlova; S. Suto; A. Watanabe

doi:10.1016/j.tsf.2007.11.069

Conformation change of nanosized silicon-organic polymer oriented into ordered nanoporous silicas

N. Ostapenko, G. Dovbeshko, N. Kozlova, S. Suto, A. Watanabe

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

20 Citations (Scopus)

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 CH^a₂ and CH^s₂ stretching vibrations and, additionally, by the redistrubution of their intensity with increasing the pore diameter.

Original language	English
Pages (from-to)	8944-8948
Number of pages	5
Journal	Thin Solid Films
Volume	516
Issue number	24
DOIs	https://doi.org/10.1016/j.tsf.2007.11.069
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

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10.1016/j.tsf.2007.11.069

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title = "Conformation change of nanosized silicon-organic polymer oriented into ordered nanoporous silicas",

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.",

keywords = "Fluorescence and Fourie Transform Infrared (FTIR) spectra, Nanoporous silicas, Nanosized poly(di-n-hexylsilane), SiO aerosil",

author = "N. Ostapenko and G. Dovbeshko and N. Kozlova and S. Suto and A. Watanabe",

note = "Funding Information: The work was partially supported by the Ministry of Education and Science of Ukraine, grant no. M/128-2005.",

year = "2008",

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doi = "10.1016/j.tsf.2007.11.069",

language = "English",

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T1 - Conformation change of nanosized silicon-organic polymer oriented into ordered nanoporous silicas

AU - Ostapenko, N.

AU - Dovbeshko, G.

AU - Kozlova, N.

AU - Suto, S.

AU - Watanabe, A.

N1 - Funding Information: The work was partially supported by the Ministry of Education and Science of Ukraine, grant no. M/128-2005.

PY - 2008/10/31

Y1 - 2008/10/31

N2 - 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.

AB - 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.

KW - Fluorescence and Fourie Transform Infrared (FTIR) spectra

KW - Nanoporous silicas

KW - Nanosized poly(di-n-hexylsilane)

KW - SiO aerosil

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DO - 10.1016/j.tsf.2007.11.069

M3 - Article

AN - SCOPUS:52149116743

VL - 516

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JO - Thin Solid Films

JF - Thin Solid Films

SN - 0040-6090

IS - 24

ER -

Conformation change of nanosized silicon-organic polymer oriented into ordered nanoporous silicas

Abstract

Keywords

ASJC Scopus subject areas

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