Synthesis, Characterization and Electrochemistry of Complexes Derived from [(1),2,3-P2Mo2W15O61]10– and First Transition Metal Ions

Synthesis and Characterization of Fe- or Cu-Substituted Molybdenum-Enriched Tungstodiphosphates

“…After treatment with a saturated KCl solution (60 mL), a yellow solid (6.07 g) was filtered off and dried in air. K 8 …”

“…[18] The substituted compounds of interest here were then synthesized along the same lines as those followed for α 2 -P 2 W 15 Mo 2 Cu and α 2 -P 2 W 15 Mo 2 Fe. [6,8] Specific details are given in the Exp. Sect.…”

“…In agreement with their observations, work of this group [6,8] has confirmed that the chemical shift of the P atom furthest from the paramagnetic centre and noted P(2) is practically unaffected by the presence of this centre, while P(1) resonances are shifted radically and broadened. This shift and broadening might be important enough to make the corresponding signal hardly or not at all observable.…”

Attempts to immobilize catalytically active substituted-heteropolytungstates in multilayer film of charged polyelectrolyte poly(allylamine hydrochloride)

“…One example of site selective metal substitution was reported by Contant et al [6,7] [8,9]. From the electrochemical overview, especially for sandwich-type POMs, the presence of the metal cation substitute unit ([M 4 O 14 (OH 2 ) 2 ]) promotes a simultaneous multi-electron transfer reactions [8][9][10][11][12][13][14][15][16][17].…”

Synthesis, characterization and electrocatalytic behaviors of α-K 6 [As 2 W 12 Mo 6 O 62 ] · 12H 2 O

“…First, the pH [10] of the solution which also determines the stability domain of the POM. Second, a ''substituent effect'' was identified in which one or more of the skeletal d 0 (usually W VI or Mo VI ) centres of the POM structure are replaced by other d 0 centres and/or by d-electron-containing transition metal cations [11][12][13][14][15][16][17][18][19]. Of particular interest for our purpose, we found that accumulation of such substituted centres is more favourable for electrocatalytic processes compared to the results observed with the corresponding monosubstituted derivatives [18,19].…”