PMID: 9176934Feb 1, 1997Paper

Measurement of spin-lattice relaxation times of 13C in organic solids

Solid State Nuclear Magnetic Resonance
J ZhouC Ye

Abstract

A transient nuclear Overhauser effect (NOE) makes measurements of the 13C spin-lattice relaxation times in organic solids complicated. Extended Solomon equations are applied in order to describe 13C spin-lattice relaxation with 1H r.f. field irradiation. Spin-lattice relaxation under r.f. irradiation is shown to be generally a triple-exponential process, but it can be reduced to be single-exponential under stronger r.f. field irradiation as well as in the absence of 1H initial magnetizations. Based on numerical calculations, the difference between spin-lattice relaxation curves obeying T1C < T1H and those obeying T1C > T1H is clearly indicated. The methyl group resonances in solid-state L-valine are examined, and the experimental results agree well with the theoretical results.

Citations

May 4, 2004·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Jinyuan ZhouPeter C M Van Zijl
Nov 18, 2005·Solid State Nuclear Magnetic Resonance·Jeffrey M Njus
Mar 26, 2013·Physical Chemistry Chemical Physics : PCCP·David C ApperleyPaul Hodgkinson
Jan 28, 2021·The Journal of Chemical Physics·Adam R AltenhofRobert W Schurko
May 25, 2006·Journal of the American Chemical Society·Sharon E AshbrookStephen Wimperis

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