01846nas a2200229   4500008004100000022001400041245006000055210005900115260009500174300001200269490000600281520108900287653001501376653000901391653001201400653002501412100002101437700002001458700001701478700002701495856009401522       2008                        eng d  a1533-488000aSn-119 magic angle spinning NMR of nanocrystalline SnO20 aSn119 magic angle spinning NMR of nanocrystalline SnO2  a25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USAbAMER SCIENTIFIC PUBLISHERScJAN  a321-3280 v83 a<p>Nanocrystalline SnO2 samples of different grain sizes, prepared by inert gas condensation technique (IGCT) and chemical precipitation method and conforming to the tetragonal phase, have been studied by variable speed (3-10 kHz) Sn-119 MAS NMR at 11.74 Tesla field. Sn-119 solid-state NMR results show that the IGCT prepared samples have good crystallinity and phase purity compared to the samples prepared by the chemical method. The determination of Sn-119 chemical shielding parameters (delta(iso), Delta delta and eta) from slow MAS spectra shows that the Sn-119 isotropic chemical shift (delta(iso)) is strongly influenced at smaller grain sizes, attributable to the change in the O2- local symmetry for the surface Sn-119 ions at smaller grain sizes. The observed line widths in MAS spectra are significantly larger than the life-time broadening due to spin-lattice (T-1) and spin-spin (T,) relaxation. The Sn-119 MAS NMR spectra are thus inhomogeneously broadened by a distribution of isotropic chemical shifts, the line broadening increasing with decrease in grain size.</p>10aHydrolysis10aIGCT10aMAS NMR10ananocrystalline SnO21 aSabarinathan, V.1 aChandran, Vinod1 aRamasamy, S.1 aGanapathy, Subramanian  uhttps://library.ncl.res.in/content/sn-119-magic-angle-spinning-nmr-nanocrystalline-sno2-0