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NMR Relaxation in Thermotropic Liquid Crystals
Author(s) -
Dong Ronald Y.
Publication year - 1983
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.198300053
Subject(s) - thermotropic crystal , chemistry , liquid crystal , relaxation (psychology) , crystallography , chemical physics , liquid crystalline , organic chemistry , condensed matter physics , phase (matter) , social psychology , physics , psychology
In this review some essential features of the spin relaxation theory in liquid crystals are outlined, with particular emphasis on orientational order director fluctuations and molecular reorientations in anisotropic environments. Experimental relaxation studies using 1 H, 2 H and 13 C nuclei during the past five years are surveyed and compared with existing theories. While the molecular dynamics are relatively well understood in the nematic and smectic phases, more work is needed to further understand cholesteric and discotic mesogens.