title: Determination of nuclear quadrupolar parameters using singularities in field-swept NMR patterns.
abstract: We propose a simple data-analysis scheme to determine the coupling constant and the asymmetry parameter of nuclear quadrupolar interactions in field-swept nuclear magnetic resonance (NMR) for static powder samples. This approach correlates the quadrupolar parameters to the positions of the singularities, which can readily be found out as sharp peaks in the field-swept pattern. Moreover, the parameters can be determined without quantitative acquisition and elaborate calculation of the overall profile of the pattern. Since both experimental and computational efforts are significantly reduced, the approach presented in this work will enhance the power of the field-swept NMR for yet unexplored quadrupolar nuclei. We demonstrate this approach in33S in α-S8and35Cl in chloranil. The accuracy of the obtained quadrupolar parameters is also discussed.
authors: Division of Chemistry, Graduate School of Science, Kyoto University, 606-8502 Kyoto, Japan.
authors: Naoki
authors: N
authors: Ichijo
authors: Division of Chemistry, Graduate School of Science, Kyoto University, 606-8502 Kyoto, Japan.
authors: Kazuyuki
authors: K
authors: Takeda
authors: Interdisciplinary Science Unit, Multidisciplinary Sciences Cluster, Research and Education Faculty, In charge of Science Research Center, Kochi University, 783-8505 Kochi, Japan.
authors: Kazuhiko
authors: K
authors: Yamada
authors: Division of Chemistry, Graduate School of Science, Kyoto University, 606-8502 Kyoto, Japan.
authors: K
authors: K
authors: Takegoshi