@article { ISI:000239869200004,
	title = {Synthesis, characterization and catalytic properties of vanadium aluminophosphate molecular sieves VAPO-31 and VAPSO-Amr from non-aqueous media},
	journal = {Applied Catalysis A-General},
	volume = {310},
	year = {2006},
	month = {AUG},
	pages = {31-39},
	publisher = {ELSEVIER SCIENCE BV},
	type = {Article},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>Vanadium samples containing aluminophosphate molecular sieve (VAPO-31) and amorphous vanadium silicoaluminophosphate (VAPSO-Amr) have been synthesized using hexamethyleneimine template from non-aqueous media for the first time. XRD and SEM analyses confirm the phase purity of the synthesized samples. FT-IR analysis suggests the incorporation of V4+ in the aluminophosphate framework. ESR, UV-vis spectroscopic, and XPS techniques and cyclicvoltametric studies confirm the incorporation of vanadium and reveal its presence in tetrahedral and square pyramidal environments in the as-synthesized samples. Cyclic voltammetry reveals the presence of two redox couples in VAPO-31. This catalyst is found to be a good oxidation catalyst. Although most of the properties of VAPO-31NA and VAPSO-Amr are similar, the latter can access more vanadium and V4+ ions. Compared to aqueous media samples, it can incorporate more vanadium especially V5+, ions and has been found to be better oxidation catalyst. The physicochemical properties also change with media. (C) 2006 Elsevier B.V. All rights reserved.</p>},
	keywords = {cyclic voltammetry, ESR, FT-IR, MAS NMR, non-aqueous, SEM, TG/DTA, UV-Vis, VAPO-31, XPS, XRD},
	issn = {0926-860X},
	doi = {10.1016/j.apcata.2006.05.001},
	author = {Venkatathri, N.}
}
@article { ISI:000253339800027,
	title = {Sn-119 magic angle spinning NMR of nanocrystalline SnO2},
	journal = {Journal of Nanoscience and Nanotechnology},
	volume = {8},
	number = {1},
	year = {2008},
	month = {JAN},
	pages = {321-328},
	publisher = {AMER SCIENTIFIC PUBLISHERS},
	address = {25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USA},
	abstract = {<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>},
	keywords = {Hydrolysis, IGCT, MAS NMR, nanocrystalline SnO2},
	issn = {1533-4880},
	doi = {10.1166/jnn.2008.015},
	author = {Sabarinathan, V. and Chandran, C. Vinod and Ramasamy, S. and Ganapathy, Subramanian}
}
