Specific features of photoisomerization of provitamin D 3 in a nematic liquid crystal

Autor:	I. P. Terenetskaya, T. N. Orlova
Rok vydání:	2006
Předmět:	Materials science Photoisomerization Provitamin Kinetics Photochemistry Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Liquid crystal Phase (matter) Spectroscopy Dissolution Cis–trans isomerism
Zdroj:	Optics and Spectroscopy. 100:584-589
ISSN:	1562-6911 0030-400X
DOI:	10.1134/s0030400x06040151
Popis:	Photoisomerization of provitamin D3 (7-dehydrocholesterol) in a nematic liquid crystal (ZLI-1695, Merck) is investigated in detail by UV absorption spectroscopy. It is found that dissolution of chiral molecules of provitamin D3 induces the cholesteric phase in a nematic. The spectral kinetics of photoisomerization in this phase changes significantly from that in an ethanol solution. A sharp nonmonotonic dependence of the increase in accumulation of trans isomer tachysterol in a liquid crystal matrix with a decrease in the induced cholesteric pitch from 2200 to 25 μm is revealed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1285158abddee8169f7d2922f0e8b05d https://doi.org/10.1134/s0030400x06040151 Zobrazit plný text záznamu Plný text ve formátu PDF