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Study of molecular dynamics and cross relaxation in tetramethylammonium hexafluorophosphate {(CH_3)_4 NPF_6} by {^1H and ^19F} NMR

Mallikarjunaiah, KJ and Damle, R and Ramesh, KP (2008) Study of molecular dynamics and cross relaxation in tetramethylammonium hexafluorophosphate {(CH_3)_4 NPF_6} by {^1H and ^19F} NMR. In: Solid State Nuclear Magnetic Resonance, 34 (3). pp. 180-185.

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Abstract

(CH3)(4)NPF6 is studied by NMR measurements to understand the internal motions and cross relaxation mechanism between the heterogeneous nuclei. The spin lattice relaxation times (T-1) are measured for H-1 and F-19 nuclei, at three (11.4, 16.1 and 21.34 MHz) Larmor frequencies in the temperature range 350-50K and H-1 NMR second moment measurements at 7 MHz in the temperature range 300-100K employing home made pulsed and wide-line NMR spectrometers. H-1 NMR results are attributed to the simultaneous reorientations of both methyl and tetramethylammonium groups and motional parameters are evaluated. F-19 NMR results are attributed to cross relaxation between proton and fluorine and motional parameters for the PF6 group reorientation are evaluated.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: H-1 F-19 NMR;Internal motions;Spin lattice relaxation time;Second momen.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 04 Nov 2009 06:23
Last Modified: 19 Sep 2010 04:58
URI: http://eprints.iisc.ernet.in/id/eprint/17807

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