T 1, Nuclear Overhauser Effects Measurements in 13C NMR Spectroscopy: Analytic Relations for Short Equilibration Delays

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Abstract:

Analytic relations that describe magnetization as a function of time are given for several dynamic nuclear Overhauser effects (NOE) experiments. They allow the extraction of spin-lattice relaxation times (T 1) and NOE (η) from a three-parameter fitting of experimental data. These results are valid even for short equilibration delays if the saturated protons have a much shorter relaxation time than the observed 13C. A simple pulse sequence that combines a progressive saturation experiment with gate decoupling is proposed for measuring T 1 and η values. The calculated η values are a good approximation even for short equilibration delays without any restrictive assumptions about relaxation times of the nuclei involved.

Keywords: NMR; Techniques, spectroscopic

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702834634415

Affiliations: Centro de Física, Instituto Venezolano de Investigaciones Ciéntificas (IVIC), Apartado 1827, Caracas 1010A, Venezuela

Publication date: July 1, 1983

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