Armitage, Ian M. and Huber, H. and Pearson, H. and Roberts, John D. (1974) Nuclear Magnetic Resonance Spectroscopy. Carbon-13 Spin-Lattice Relaxation Time Measurements of Amino Acids. Proceedings of the National Academy of Sciences of the United States of America, 71 (5). pp. 2096-2097. ISSN 0027-8424 http://resolver.caltech.edu/CaltechAUTHORS:20120725-082129515
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The ^(13)C spin-lattice relaxation times, T_1's, of several amino acids have been measured as a function of pD and concentration. A strong dependence of the carboxyl carbon T_1 was observed for both pD and concentration and is believed to be due to intermolecular associations. For the carboxyl carbon, spin rotation is proposed as the predominant relaxation mechanism, whereas the other carbons are relaxed mainly by the dipole-dipole mechanism, and their relaxation times are relatively independent of changes in concentration and pD.
|Additional Information:||© 1974 National Academy of Sciences. Contributed by John D. Roberts, February 27, 1974. We wish to thank Prof. D. M. Grant, Sherman Fairchild Distinguished Scholar at the California Institute of Technology (on sabbatical leave from the University of Utah), for many helpful discussions. This work was supported by the Public Health Service, Research Grant GM-11072 from the Division of General Medical Sciences, and by the National Science Foundation. H.P. is a Harkness Postdoctoral Research Fellow, 1972-74. This paper is contribution no. 4841 from the Gates and Crellin Laboratories of Chemistry.|
|Subject Keywords:||progressive saturation|
|Other Numbering System:|
|Official Citation:||Ian M. Armitage, H. Huber, H. Pearson, and John D. Roberts Nuclear Magnetic Resonance Spectroscopy. Carbon-13 Spin-Lattice Relaxation Time Measurements of Amino Acids PNAS 1974 71 (5) 2096-2097|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||25 Jul 2012 16:35|
|Last Modified:||25 Jul 2012 16:35|
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