Untitled

Hydrothermal Synthesis, Characterization and Photoluminescent Properties of a New Vanadium Substituted Keggin Assembly Supported by Ni Complex

“…In particular, when substituted by vanadium metal, additional properties (antimicrobial, redox, acidity, stabilization, etc.) can be observed in many oxidations, biological and catalytic processes [14][15][16][17][18][19]. However, the controls of their formation conditions are rather difficult when they are combined to metalorganic frameworks.…”

Dititanium‐Containing 19‐Tungstodiarsenate(III) [Ti2(OH)2As2W19O67(H2O)]8−: Synthesis, Structure, Electrochemistry, and Oxidation Catalysis

“…In aqueous solutions with mercury electrodes, the Ti IV center is reduced to the Ti III state and the corresponding process is usually found at a less-negative potential than the onset reduction potential of W VI centers. [5,6] The same situation seems to prevail when a glassy-carbon working electrode was used in aqueous media [7,8] even though the clear assignment of the Ti IV to Ti III wave was not always shown. In acetonitrile solution, the focus was directed on the influence of protonation on the cyclic voltammogram waves run on a glassy carbon electrode.…”

“…Among recent achievements, experiments carried out with mercury working electrodes in acetate buffer [5,6] and on glassy-carbon working electrodes in aqueous solutions, [7,8] or in acetonitrile, [3a, 9] are illustrative of the main behavior of these complexes. In aqueous solutions with mercury electrodes, the Ti IV center is reduced to the Ti III state and the corresponding process is usually found at a less-negative potential than the onset reduction potential of W VI centers.…”

EPR investigations of electron transfer in one-electron reduced α-1,4 K5[PV2W10O40].3H2O

“…These applications are based on the ability of the polyanions to undergo multi-electron redox processes without any modifications in their structures 8,9 . Among the Keggin-type heteropolyanions, vanadium-substituted mixed addenda heteropoly tungstates and molybdates have qualified as better catalysts for many reactions [10][11][12][13][14][15][16] . Increased interest in these compounds is also due to the fact that the reduced form of these heteropolyanions, known as heteropoly blues, exhibit mixedvalence behaviour similar to class-II type compounds of the Robin and Day scheme 17 .…”

“…Analysis of the g and A tensors has given important informations about electron delocalisation processes in these heteropoly blues. Heteropoly blues of vanadiumsubstituted heteropoly tungstates and molybdates have been generally prepared either by electrochemical [20][21][22] or by chemical methods 16,23…”