title: Theoretical and experimental insights into applicability of solid-state 93Nb NMR in catalysis.
abstract: Ab initio DFT calculations of (93)Nb NMR parameters using the NMR-CASTEP code were performed for a series of over fifty individual niobates, and a good agreement has been found with experimental NMR parameters. New experimental and calculated (93)Nb NMR data were obtained for several compounds, AlNbO4, VNb9O25, K8Nb6O19 and Cs3NbO8, which are of particular interest for catalysis. Several interesting trends have been identified between (93)Nb NMR parameters and the specifics of niobium site environments in niobates. These trends may serve as useful guidelines in interpreting (93)Nb NMR spectra of complex niobium oxide systems, including amorphous samples and niobium-based multicomponent heterogeneous catalysts. Potential applications of (93)Nb NMR to study solid polyoxoniobates are discussed.
authors: Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia.
authors: Evgeniy
authors: E
authors: Papulovskiy
authors: Alexandre A
authors: AA
authors: Shubin
authors: Victor V
authors: VV
authors: Terskikh
authors: Chris J
authors: CJ
authors: Pickard
authors: Olga B
authors: OB
authors: Lapina
mesh_terms: D002384:Catalysis; D009682:Magnetic Resonance Spectroscopy; D009556:Niobium / Q000737:chemistry*; D010087:Oxides / Q000138:chemical synthesis / Q000737:chemistry*; D011789:Quantum Theory
chemical_list: D010087:Oxides; D009556:Niobium