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CONFORMATIONAL MOBILITY OF CHOLESTERYLE n-ALKOXYBENZOATES AT THE PHASE TRANSITIONS

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/29953

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dc.creator Vinijchuk, A. V. en_US
dc.creator Golovina, N. A. en_US
dc.creator Polishchuk, A. P. en_US
dc.creator Puchkovskaya, G. en_US
dc.date.accessioned 2007-11-20T17:17:11Z
dc.date.available 2007-11-20T17:17:11Z
dc.date.issued 1995 en_US
dc.identifier 1995-FE-08 en_US
dc.identifier.uri http://hdl.handle.net/1811/29953
dc.description Author Institution: Ukrainian Academy of Sciences, Prospect Nauki, 46, 252650 Kiev, Ukraine. en_US
dc.description.abstract In this report IR spectra of cholesteryle n-aloxybenzoates homologes (n=1, 3-6, 110, 16) in 100-570 K temperature range have been studied and X-ray structural analysis of the crystals has been performed. On the base of interpreted spectra the IR-band, which are the most sensitive to phase transitions, were found. These are the esteric group vibrations $(1100-1120 cm^{-1}, 1240-1290 cm^{-1}, 1700-1740 cm^{-1})$ and the benezene ring stretching vibrations Q (C = C) $(1515 cm^{-1}, 1580 cm^{-1}, 1610 cm^{-1})$, It was found that in contrast to n-alkaonates of cholesterine, the methylene chains of all investigated homologues are melted in crystalline phase even at 100K. It is explained by the antiparallel packing of the AOBCh molecules in layers, when alkyl ``tail'' has a free space between the rigid volume steroid nucleus. By means of IR and X-ray techniques it was found that there are nonequivalent molecules, even in solid state, which differ from each other by angle between the planes of steroid nucleus and ester group. en_US
dc.format.extent 68182 bytes
dc.format.mimetype image/jpeg
dc.language.iso English en_US
dc.title CONFORMATIONAL MOBILITY OF CHOLESTERYLE n-ALKOXYBENZOATES AT THE PHASE TRANSITIONS en_US
dc.type article en_US