Solid-state 95Mo NMR of mixed-valence polyoxomolybdates (V, VI) with localized or delocalized d1 electrons

Applications of nuclear shielding

“…The three MBDs, HMA2n (residues 1-79), HMA4n (residues 1-96) and HMA7n (residues 56-127) and an HMA7/4n chimera were expressed in Escherichia coli. 113 Cd chemical shift in [ 113 Cd]HMA4n was consistent with a CdIIS 2 OX (X = O or N) coordination sphere. 152 The complex formation between Cd(II) and the ligands cysteine (H 2 Cys) and penicillamine (H 2 Pen = 3,3 0 -dimethylcysteine) in aqueous solutions was studied at pH = 7.5 and 11.0 by 113 Cd NMR and Cd K-and L3-edge x-ray absorption spectroscopy.…”

“…113 Cd chemical shift in [ 113 Cd]HMA4n was consistent with a CdIIS 2 OX (X = O or N) coordination sphere. 152 The complex formation between Cd(II) and the ligands cysteine (H 2 Cys) and penicillamine (H 2 Pen = 3,3 0 -dimethylcysteine) in aqueous solutions was studied at pH = 7.5 and 11.0 by 113 Cd NMR and Cd K-and L3-edge x-ray absorption spectroscopy. For the molar ratio CH 2 L/CCd(II) = 2, the 113 1 H and 113 Cd NMR experiments at variable temperature for 3 and 4 show that dynamic processes are taking place in solution 113 Cd NMR chemical shift data for complexes 1-4 in solution were also reported.…”

“…X-ray crystallogenetic analysis reveals that complex 1 exhibits a 3D framework with sra topological and a rare eight-coordinated Cd(II) with two bound methoxy groups as secondary building unit (SBU). 113 Cd NMR spectrum of 1 showed that the chemical shift of eight-coordinated Cd(II) appeared at d-108.9 ppm. 151 HMA2, HMA4 and HMA7 are three of the eight heavy metal transporting P1B-type ATPases in the simple plant Arabidopsis thaliana.…”

“…152 The complex formation between Cd(II) and the ligands cysteine (H 2 Cys) and penicillamine (H 2 Pen = 3,3 0 -dimethylcysteine) in aqueous solutions was studied at pH = 7.5 and 11.0 by 113 Cd NMR and Cd K-and L3-edge x-ray absorption spectroscopy. For the molar ratio CH 2 L/CCd(II) = 2, the 113 1 H and 113 Cd NMR experiments at variable temperature for 3 and 4 show that dynamic processes are taking place in solution 113 Cd NMR chemical shift data for complexes 1-4 in solution were also reported. 154 It was shown that the 113 Cd NMR chemical shifts observed for CdII in the designed TRI series (TRI = Ac-G-(LKALEEK) 4 G-NH 2 ) of peptides vary depending on the proportion of trigonal planar CdS 3 and pseudotetrahedral CdS 3 O species present in the equilibrium mixture.…”

“…The isotropic and anisotropic chemical shift values of sites of Mo V in 1 and Mo V,VI in 2, respectively, are larger than those of Mo VI sites. 113 Oxomolybdenum(VI) complexes were analysed by means of 95 Mo NMR in solution to study their coordination chemistry and reactivity. 114 The relationship between the electronic density on the metal tuned by the electron-donor ability of the coordinated ligands and the 95 Mo chemical shift was clarified for mono-and bimetallic complexes showing a hexaor hepta-coordination around the metal centre.…”