Electrospray mass spectral study of isopolyoxomolybdates

Investigation of Intermediates Involved in the Photochemical Formation of Mo‐Blue Nanoring by Capillary Electrophoresis–Mass Spectrometry

“…The signals for species with a charge of 2-and 1-, observed when m/z Ͻ 1100, were assigned to the chain-like anions comprising corner-shared MoO 4 tetrahedra, [11] which are produced through ESI of the molybdate fragments (Table S1, Supporting Information). Broad signals observed in the range m/z = 1700-2400 were unambiguously assigned to species with a charge of 12-, 11-, and 10-, corresponding to a mass of 20810 Ϯ 10, in the same order as the mass (fw: 21748.…”

Studies on the Reduction of [(C5Me5)2Mo2O5] in Methanol/Water/Acetate Solutions by On‐Line Electrochemical Flowcell and Electrospray Mass Spectrometry

“…More information, on the other hand, is available on inorganic oxomolybdenum compounds, including ESI-MS speciation studies. Singly, doubly, and triply charged heteropoly-and isopolymolybdate anions were studied in organic and aqueous organic solutions, [13,14] though the reduction products of these compounds were not investigated by mass spectrometry. [15Ϫ19] other contributions have restricted the use of aqueous media to some aspects of the synthetic procedure.…”

The partitioning of molybdenum(VI) between aqueous liquid and vapour at temperatures up to 370°C

“…However, two lines of evidence suggest that this was not the case. Firstly, spectrographic studies of aqueous ammonium molybdate solutions at 20-80°C and 1 bar indicate that ammonium molybdate dissociates completely upon dissolution to form ammonium and mono-and poly-molybdate ions (Himeno et al, 1997;Walanda et al, 1999;Cao et al, 2006). Further, the precipitation of pure MoO 3 thin films at 250-350°C and 1 bar has been accomplished using solutions of ammonium molybdate (Patil et al, 1997;Davis et al, 2004), which suggests that ammonium is uninvolved in aqueous Mo speciation over a wide range of temperatures and solution densities.…”