Monovanadate

Ammonium monovanadate organic nitrogen compounds TLC plates prepared with 2% ammonium monovanadate solution [204]... 

Mandelin s Reagent) (Ammonium Monovanadate — Sulfuric Acid or Vanadium Pentoxide — Sulfuric Acid Reagent)... 

Dissolve 0.6 g anunonium monovanadate (ammonium metavanadate) in 22.5 ml water and carefully add 2.5 ml cone, sulfuric acid and 25 ml acetone. 

P-Blockers Saturated solution of ammonium monovanadate in cone, sulfuric add [7]. 

Ammoniiun monovanadate Vanadiiun(V) oxide Sulfuric acid... 

The following examples of reagent sequences, which include the reagent Ammonium monovanadate — p-anisidine described in the second part of the book can also be classified as redox reactions. 

Solution I Dissolve 2.5 g ammonium monovanadate (ammonium metavana-... 

The reaction mechanism has not been elucidated the ammonium monovanadate presumably oxidizes the phenols to quinones, that then react with />-anisidine to form quinonimines. 

Vanadate-catalyzed photocleavage of the Ca -ATPase was observed after illumination of sarcoplasmic reticulum vesicles or the purified Ca -ATPase with ultraviolet light in the presence of 1 mM monovanadate or decavanadate [104]. Two sites... 

For example, the oxidative dehydrogenation of ethane and propane was examined via UV-visible and Raman spectra. The study investigated the catalytic properties vanadia formulations that possessed a range of VO surface species density (1.4—34.2 V/nm ) on an AI2O3 support. The observations showed increased surface densities, greater than 2.3 V/nm , favored two-dimensional polyvanadates. At lower surface densities, ca. 2.3 V/nm , predominately isolated monovanadate species were observed. Further increasing surface densities to more than 7.0 V/nm yielded V2O5 crystallites. ... 

Hamung, S.E., E. Larsen, and EJ. Pedersen. 1993. Structure of monovanadates in aqueous solution. Acta Chem. Scand. 47 674—682. 

Ammonium Vanadate Solution Dissolve 2.35 g of ammonium monovanadate (NH4VO3) in 400 mL of warm (60°) water. While stirring, slowly add 20 mL of Nitric Acid Solution (27%). Cool to ambient temperature. Quantitatively transfer the mixture to a 1000-mL volumetric flask, dilute to volume with water, and mix. This solution is stable for 4 weeks when stored at ambient temperature and shielded from light. 

Figure 4.5 (a) Uncorrected and UV-Vis diffuse reflectance-corrected Raman band intensity of surface vanadia species (band at -1015 cm" ) as a function of surface VO, concentration in V/G-AbOs system, (b) Amount of monovanadate as a function of surface VO, density. 

Quantificahon greatly aids the understanding of the catalytic contributions of different vanadia species during catalytic reactions. For example, our preliminary activity test over these supported catalysts showed that the I.2V/6-AI2O3 sample exhibits better stability than higher loading catalysts for butane dehydrogenation in dilute feed [57]. The explanation is that the monovanadate species (ca 50% on the surface) dilute the polyvanadate species so that the two-dimensional coke species responsible for catalyst deactivation are less likely to form [40, 57]. 

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