51V ESE-ENDOR studies of oxovanadium(IV) complexes: investigation of the nuclear quadrupole interaction

Article Abstract:

Research was conducted to examine a structurally diverse series of oxovanadiium(IV) complexes using the technique of 51V electron spin echo-electron nuclear double resonance. 51V nuclear quadrupole coupling constants were calculated by a perturbation theory method. Results demonstrate that the nuclear quadrupole coupling constant is sensitive to ligands binding trans to the oxygen of the oxo bond.

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Pulsed EPR/ENDOR characterization of the Cu2+ surface site in photosynthetic bacterial reaction centers

Article Abstract:

Analogous structural features are observed for the Cu2+ surface site involved in modulating QA-1QB->QAQB-1 electron transfer in RCs from Rb. sphaeroides, Rb. capsulatus, and Blc. viridis. The findings indicate that Cu2+ has a different coordination environment from the crystallographically characterized Zn2+ and Cd2+ surface sites in Rb. sphaeroides RCs.

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Electronic structure of the aqueous vanadyl ion probed by 9 and 94 GHz EPR and pulsed ENDOR spectroscopies and density functional theory calculations

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An investigation into the aqueous ion ([VO(H2O)5]2+) using X-band EPR, 94 GHz W-band EPR, and ESE_ENDOR is presented.

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