ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The statistical principle of maximum entropy is applied to the analysis of dipolar couplings from 1H NMR of nonrigid molecules dissolved in liquid-crystalline phases. A distribution function for the orientational and inter-ring angles is so obtained. The most probable internal angle cursive-phi is determined for 4,4'-dichlorobiphenyl (cursive-phi=34°) in the nematic phase of I52, 4-pentyl-4'-cyanobiphenyl (cursive-phi=32°) and 4'-Br-4-Cl-2,6-difluorobiphenyl (cursive-phi=42°) in EBBA. The physical reliability of the distributions determined is discussed. The maximum-entropy treatment seems to indicate a limit for the information on the internal motion obtainable from the experimental data.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.460669
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