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1 2003

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

Gavrilko T., Gnatyuk I., Puchkovska G., Baran J., Marchewka M., Morawska-Kowal T.

Optica Applicata

2003

Vol. 33, nr 1

23-32

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.