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Inequivalent quadrupolar couplings of the deuterium‐exchanged nitrogen in micellar liquid crystals
Author(s) -
Huque Entazul M.
Publication year - 1989
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280460404
Subject(s) - deuterium , chemistry , liquid crystal , intramolecular force , liquid nitrogen , nitrogen , amphiphile , crystallography , hydrocarbon , nitrogen atom , chemical physics , stereochemistry , organic chemistry , physics , ring (chemistry) , atomic physics , condensed matter physics , copolymer , polymer
In deuterium NMR, two inequivalent quadrupolar couplings of the deuterium‐exchanged nitrogen in a hydrocarbon chain near a chiral carbon atom have been observed in the nematic and cholesteric mesophases. The two quadrupolar doublets arise from the ND segments of the amphiphile and are interpreted as being due to the intramolecular motion in the amphiphile chain about the C—N bond. Different peak intensity of the two doublets suggests that one conformation is more stable than the other.