title: A natural abundance (77)Se solid-state NMR study of inorganic compounds.
abstract: Various inorganic selenium-based compounds were analysed by (77)Se solid-state NMR, and a distinct difference in chemical shift ranges for compounds where selenium is present as selenide (Se(2-)) ionically and covalently bonded systems was observed. The selenides exhibit a shift range of approximately -700 to -100ppm, as opposed to 700 to 1600ppm for the compounds where there tends to be more direct covalent bonding to the selenium. The anisotropic hyperfine shift observed in NbSe(2) is shown to be axially symmetric, where the H(11) component is found to be normal to the Se3-trigonal plane.
authors.affiliation: Department of Physics, University of Warwick, Coventry, CV4 7AL, UK.
authors.forename: T F
authors.initials: TF
authors.lastname: Kemp
authors.forename: A
authors.initials: A
authors.lastname: Wong
authors.forename: M E
authors.initials: ME
authors.lastname: Smith
authors.forename: P T
authors.initials: PT
authors.lastname: Bishop
authors.forename: N
authors.initials: N
authors.lastname: Carthey
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D008670:Metals / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry; D018036:Selenium Compounds / Q000737:chemistry*
chemical_list: D008670:Metals; D018036:Selenium Compounds; D010100:Oxygen