51V Solid state NMR studies of vanadia based catalysts

Orientation of electric field gradient and chemical shift tensors in BiVO4 at room temperature by51V NMR

“…The lineshape is mainly governed by the CSA, whose parameters can thus be extracted with good reliability. The measured span of the CSA is slightly greater than the result reported by Lapina et al 3 The reÐnement exe- (6,8,4) cuted with the previously reported quadrupolar parameters (s \ 4.8 MHz and gives the same result g Q \ 0.38) for the CSA parameters. Even when the quadrupolar interaction is set to zero, the CSA parameters remain unchanged.…”

“…3 Euler angles between principal axis systems of the two interactions (0^16¡, 66^9¡, 169^14¡) were determined and satisfy the crystallographic symmetries. However, this orientation is only consistent with the results of Choh et al 4 if the b angle is regarded as 90¡.…”

Magnesium Insertion in Vanadium Oxides: A Structural Study

“…One may suggest a layered character of the crystal structure of the phases III and IX -XI, a conservation of the structure within the layers, [22]). …”

Studies on the Interaction of Vanadia with Modified Silica Supports and Catalytic Activity for Oxidative Dehydrogenation of Propane: Effect of Support Modification by Al3+, Zr4+ or Y3+

“…or vanadia crystallites on various supports. [22][23][24][25][26][27][28] Figure 6 shows the 51 V static and MAS NMR spectra of V 2 O 5 , VS and VSA. The static pattern of V 2 O 5 is similar to that reported in the literature indicating a distorted octahedrally coordinated V 5+ ion with axial symmetry.…”