Application of NIR spectroscopic method to the study of porous glasses filled with liquid crystals

• Autorzy: Gavrilko T. , Gnatyuk I. , Puchkovska G. , Baran J. , Marchewka M. , Morawska-Kowal T.
• Konferencja: 6th Seminar Porous Glasses-Special Glasses, PGL 2002, Szklarska Poręba, 22-26.IX.2002 r.
• Języki publikacji: EN

Abstrakty

EN

The paper focuses on NIR spectroscopic studies of the structure of surface active centers and interface interactions in novel nanocomposition materials built of nanoporous glasses (PG) and n-alkylcyanobiphenyl (nCB) liquid crystals (LC). NIR (12000–4000 cm–1) spectra of bare PG with pore size ranging from 2 to 10 nm and those loaded with nCB (n = 2, 4, 5, 8) were investigated at room temperature for two types of PG of variable surface activity preheated to 200 °C (type I) and 600 °C (type II). The number of surface active centers for the two types of PG has been evaluated as a function of pore diameter, and the relative number of the LC molecules directly bounded to the pore active centers was estimated.

Słowa kluczowe

EN

porous glass; n-alkylcyanobiphenyls; liquid crystals; NIR spectroscopy; surface active centers; hydrogen bond

PL

szkło porowate; ciekłe kryształy; spektroskopia w bliskiej podczerwieni; centra adsorpcyjne; wiązanie wodorowe

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2003
• Tom: Vol. 33, nr 1
• Strony: 23--32
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Gavrilko T.

• Institute of Physics, National Academy of Sciences of Ukraine, Nauki Pr., 03028 Kyiv, Ukraine

autor

Gnatyuk I.

• Institute of Physics, National Academy of Sciences of Ukraine, Nauki Pr., 03028 Kyiv, Ukraine

autor

Puchkovska G.

• Institute of Physics, National Academy of Sciences of Ukraine, Nauki Pr., 03028 Kyiv, Ukraine

autor

Baran J.

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okolna 2, 50-950 Wrocław, Poland

autor

Marchewka M.

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okolna 2, 50-950 Wrocław, Poland

autor

Morawska-Kowal T.

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okolna 2, 50-950 Wrocław, Poland

Bibliografia

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