(51)V solid-state NMR investigations and DFT studies of model compounds for vanadium haloperoxidases.
Three cis-dioxovanadium(V) complexes with similar N-salicylidenehydrazide ligands modeling hydrogen bonding interactions of vanadate relevant for vanadium haloperoxidases are studied by (51)V solid-state NMR spectroscopy. Their parameters describing the quadrupolar and chemical shift anisotropy interactions (quadrupolar coupling constant C(Q), asymmetry of the quadrupolar tensor eta(Q), isotropic chemical shift delta(iso), chemical shift anisotropy delta(sigma), asymmetry of the chemical shift tensor eta(sigma) and the Euler angles alpha, beta and gamma) are determined both experimentally and theoretically using DFT methods. A comparative study of different methods to determine the NMR parameters by numerical simulation of the spectra is presented. Detailed theoretical investigations on the DFT level using various basis sets and structural models show that by useful choice of the methodology, the calculated parameters agree to the experimental ones in a very good manner.
Schweitzer
Annika
A
Institut für Physikalische Chemie, Friedrich-Schiller-Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany.
Gutmann
Torsten
T
Wächtler
Maria
M
Breitzke
Hergen
H
Buchholz
Axel
A
Plass
Winfried
W
Buntkowsky
Gerd
G
D001331:Automation; D030562:Databases, Protein; D004560:Electricity; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy; D010544:Peroxidases / Q000737:chemistry*; D011789:Quantum Theory; D015203:Reproducibility of Results; D014639:Vanadium / Q000737:chemistry
D014639:Vanadium; D010544:Peroxidases; C026195:bromide peroxidase