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✦   LIBER   ✦

NMR and QNS investigation of molecular liquids

✍ Scribed by M.D. Zeidler

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
602 KB
Volume
33
Category
Article
ISSN
0013-4686

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✦ Synopsis

NMR relaxation results are summarized for lScrown-6 ether, for water (Hi'0 and D,O) in dimethylsulfoxide, for tetrahydrofuran and for methyl iodide in the corresponding clathrate hydrates. Rotational diffusion coefficients are derived for the crown ether. Deuteron quadrupole-coupling constants are obtained for D,O in mixture with dimcthylsulfoxide.

High-pressure self-diffusion constants obtained by the NMR spin-echo method are presented for ethanol and I-propanol.

A QNS investigation of lS-crown-6

ether is conducted in order to supplement the NMR data.

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Cycloartenol(4), a natural plant sterol, was shown to be an effective membrane reinforcer; this was attributed to its conformation. We now present a conformational analysis of 4 by molecular modeling and NMR. Molecular modeling suggests that two conformations I and I1 coexist, differing mainly at th