Fluorine in silicate glasses: A multinuclear nuclear magnetic resonance study
نویسندگان
چکیده
منابع مشابه
NUCLEAR MAGNETIC RESONANCE STUDY OF THE STRUCTURE OF GLYOXALDIHYDRAZONE
Study of the nuclear magnetic resonance spectra of glyoxaldihydrazone in dimethylsulfoxide and deuterochlorofonn leads to the conclusion that this compound exists predominantly in non-chelate structure
متن کاملCharacterisation of heterogeneous molybdate and chromate phase assemblages in model nuclear waste glasses by multinuclear magnetic resonance spectroscopy.
A series of sodium borosilicate glasses containing cesium, molybdenum, and chromium was prepared to investigate the partitioning of chromium amongst the glass and phase-separated crystalline molybdates. The precipitates were examined by (133)Cs, (23)Na, and (95)Mo MAS NMR, revealing a phase assemblage consisting of Na(2)MoO(4), Na(2)MoO(4)·2H(2)O, Cs(2)MoO(4), Cs(2)CrO(4), CsNaMoO(4)·2H(2)O, an...
متن کاملA multinuclear nuclear magnetic resonance study of the monovalent-divalent cation sites of pyruvate kinase.
The effectiveness of measuring distances between monovalent and divalent cation sites on enzymes has been examined by 6Li, 7Li, I4N, 15N, 23Na, 39K, 85Rb, 87Rb, and 133Cs nuclear magnetic resonance (NMR). Measurements were made of the paramagnetic effect of enzyme-bound Mn2+ on the longitudinal spin-lattice relaxation rate ( l /T l ) of the monovalent cations by using MnZ+ at the divalent catio...
متن کاملA Nuclear Magnetic Resonance Study
Complexes of histidine with Co( 11) in aqueous solution have been examined by proton magnetic resonance spectroscopy. Coordinate interaction of histidine with paramagnetic Co( 11) produces large contact interaction shifts in the histidine proton resonance spectra. Four histidine-Co( 11) complexes have been distinguished : a weak 1: 1 histidine-Co(I1) complex a t low pH ( < 4 ) in which only the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geochimica et Cosmochimica Acta
سال: 1992
ISSN: 0016-7037
DOI: 10.1016/0016-7037(92)90091-v