NMR studies of C-13-iodomethane: Different behavior in thermotropic and lyotropic liquid crystals

TitleNMR studies of C-13-iodomethane: Different behavior in thermotropic and lyotropic liquid crystals
Publication TypeJournal Article
Year of Publication2004
AuthorsShahkhatuni A.G, Shahkhatuni A.A, Panosyan H.A, Park G.HJ, Martin R.W, Pines A
JournalJournal of Physical Chemistry A
Volume108
Issue33
Pagination6809-6813
Date PublishedAug 19
ISBN Number1089-5639
Accession NumberWOS:000223289700001
Keywordsbiomolecules
Abstract

High-resolution NMR spectra of C-13-iodomethane dissolved in thermotropic and lyotropic liquid crystalline solvents have been used to measure H-1-H-1 and C-13-H-1 dipolar couplings. The ratio of these two couplings, which is a function of the H-C-H bond angle in C-13-iodomethane, is, in general, different from that expected from the known molecular structure; solvent-solute interactions in liquid crystalline solutions are responsible for this difference. In thermotropic liquid crystalline solutions, the apparent bond angle deviation (Deltatheta(a)) increases with decreasing molecular ordering. In contrast, in lyotropic liquid crystals, no significant spectral aberration has been observed. These results indicate a fundamental physicochemical difference between the intermolecular interactions that prevail in thermotropic and lyotropic liquid crystals.

URL<Go to ISI>://WOS:000223289700001
DOI10.1021/Jp047330g
Short TitleNMR studies of C-13-iodomethane: Different behavior in thermotropic and lyotropic liquid crystals
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