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Structural and dynamical studies of the relaxation effects induced by proton perturbation during 13C spin-lattice relaxation rate measurements

✍ Scribed by Claudio Rossi; Nadia Marchettini; Lionello Pogliani; Franco Laschi; Neri Niccolai


Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
314 KB
Volume
136
Category
Article
ISSN
0009-2614

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✦ Synopsis


An NMR method for determining carbon spin-lattice relaxation rates under three different proton perturbation conditions is proposed. Thymidine is investigated as a model system. Dynamical and structural information is obtained by comparison of the carbon-13 relaxation rates obtained under broad-band pulse and selected pulse conditions with standard spin-lattice relaxation rates.


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High-resolution 13C NMR spectra of 15 samples of uncomplexed and metalcomplexed tetranactin and nonactin were recorded in the solid state, revealing characteristic displacements of peaks due to complex formation and the effect of crystalline packing on the 13C chemical shifts and spidattice relaxati