Vol. 33, Issue 1, pp. 23-32

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  2. Optica Applicata Vol. 33, Issue 1, pp. 23-32 (2003)
Vol. 33 Issue 1 pp. 23-32

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

Tatiana Gavrilko, Ivan Gnatyuk, Galyna Puchkovska, Jan Baran, Mariusz Marchewka, Teresa Morawska-Kowal

Keywords

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

Abstract

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.

Vol. 33
Issue 1
pp. 23-32

0.87 MB
OPTICA APPLICATA - a quarterly of the Wrocław University of Science and Technology, Faculty of Fundamental Problems of Technology