Nuclear overhauser effect and scalar coupling relaxation

The density-matrix equations, as formulated by N. R. Krishna and S. L. Gordon (J. Chem. Phys. 58, 5687 (1973)) for a binary solution are considered, taking into account intermolecular scalar coupling of the first kind as the main relaxation process. The enhancement factor for the intermolecular Over...

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Autor principal: Balonga, Pablo Enrique
Publicado: 1984
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222364_v59_n1_p50_Balonga
http://hdl.handle.net/20.500.12110/paper_00222364_v59_n1_p50_Balonga
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00222364_v59_n1_p50_Balonga
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spelling paper:paper_00222364_v59_n1_p50_Balonga2023-06-08T14:47:34Z Nuclear overhauser effect and scalar coupling relaxation Balonga, Pablo Enrique The density-matrix equations, as formulated by N. R. Krishna and S. L. Gordon (J. Chem. Phys. 58, 5687 (1973)) for a binary solution are considered, taking into account intermolecular scalar coupling of the first kind as the main relaxation process. The enhancement factor for the intermolecular Overhauser effect is obtained using the nonviscous liquid approximation. This factor results in the opposite sign to that obtained when the only relaxation mechanism considered is the intermolecular dipole-dipole interaction even for strongly coupled spin systems. Since these two are the only interactions which are capable of showing any intermolecular Overhauser effect, this difference in sign obtained for the enhancement factor provides a unique possibility for determining which mechanism is prevailing in a given binary system. An intermolecular Overhauser experiment made by the INDOR procedure is considered. © 1984. Fil:Balonga, P.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1984 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222364_v59_n1_p50_Balonga http://hdl.handle.net/20.500.12110/paper_00222364_v59_n1_p50_Balonga
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The density-matrix equations, as formulated by N. R. Krishna and S. L. Gordon (J. Chem. Phys. 58, 5687 (1973)) for a binary solution are considered, taking into account intermolecular scalar coupling of the first kind as the main relaxation process. The enhancement factor for the intermolecular Overhauser effect is obtained using the nonviscous liquid approximation. This factor results in the opposite sign to that obtained when the only relaxation mechanism considered is the intermolecular dipole-dipole interaction even for strongly coupled spin systems. Since these two are the only interactions which are capable of showing any intermolecular Overhauser effect, this difference in sign obtained for the enhancement factor provides a unique possibility for determining which mechanism is prevailing in a given binary system. An intermolecular Overhauser experiment made by the INDOR procedure is considered. © 1984.
author Balonga, Pablo Enrique
spellingShingle Balonga, Pablo Enrique
Nuclear overhauser effect and scalar coupling relaxation
author_facet Balonga, Pablo Enrique
author_sort Balonga, Pablo Enrique
title Nuclear overhauser effect and scalar coupling relaxation
title_short Nuclear overhauser effect and scalar coupling relaxation
title_full Nuclear overhauser effect and scalar coupling relaxation
title_fullStr Nuclear overhauser effect and scalar coupling relaxation
title_full_unstemmed Nuclear overhauser effect and scalar coupling relaxation
title_sort nuclear overhauser effect and scalar coupling relaxation
publishDate 1984
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222364_v59_n1_p50_Balonga
http://hdl.handle.net/20.500.12110/paper_00222364_v59_n1_p50_Balonga
work_keys_str_mv AT balongapabloenrique nuclearoverhausereffectandscalarcouplingrelaxation
_version_ 1768544027611758592

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