A simple method for analyzing 51V solid-state NMR spectra of complex systems |
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| Authors: | Fenn Annika Wächtler Maria Breitzke Hergen Buchholz Axel Lippold Ines Plass Winfried Buntkowsky Gerd |
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| Institution: | aInstitut für Physikalische Chemie, Friedrich-Schiller-Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany;bEduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstr. 20, D-64287 Darmstadt, Germany;cInstitut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Carl-Zeiss-Promenade 10, D-07745 Jena, Germany |
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| Abstract: | Five vanadium complexes as models for biological systems were investigated using 51V-MAS–NMR spectroscopy. All spectra show an uncommon line shape, which can be attributed to a shorter relaxation time of the satellite transition in contrast to the central one. A method for the reliable analysis of such kind of spectra is presented for the first time and the most important NMR parameters of the investigated complexes (quadrupolar coupling constant CQ, asymmetry of the EFG tensor ηQ, isotropic chemical shift δiso, chemical shift anisotropy δσ and asymmetry of the CSA tensor ησ) are presented. These results are of particular importance with respect to the analysis of the 51V-MAS–NMR spectra of vanadium moieties in biological matrices such as vanadium chloroperoxidase, which show hitherto unexplained low intensity of the satellite sideband pattern. |
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| Keywords: | Vanadate Model system 51V-NMR Satellite transitions |
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