Redox chemistry of the Keggin heteropolyoxotungstate anion in ionic liquids

Investigation of hybrid molecular material prepared by ionic liquid and polyoxometalate anion

“…9,10 The molecular materials containing organic cations bonded with bulky Keggin anions can find applications, for example, in photochromism 15 and electrochemical systems. 16,17,18 In this paper, we report the synthesis and characterization of molecular hybrid compound based on imidazolium cation and polyoxometalate Keggin anion. The molecular nature, morphology and thermal stability of the hybrid compound are examined by PXRD, TGA, FTIR, UV-Vis-NIR DRS, 31 P MAS NMR and SEM.…”

Simulating the Favorable Aggregation of Monolacunary Keggin Anions

“…In this publication, we have presented a series of large-scale molecular dynamics simulations (MD), 39 12 O 40 ] 9-, we find that, throughout their respective MD simulations, even when not aggregated, both of these anions are able to recruit an average of 9.90 lithium cations each: this is evidently enough to annul the -9 negative charge, and "electrostatically glue" the anions together. On the other hand, [AlW 12 O 40 ] 5-are only able to recruit an average of 2.19 cations each, with a large excess remaining free in solution: the "electrostatic glue" effect is not replicated in this case, and this is why aggregation at low concentrations is not observed in our simulations.…”

“…33,34 Secondly, dynamic electrostatic interactions are certain to play a primary role in the supramolecular applications of POMs. These include encapsulation into dendrimers, 35,36 surfactants, 37 and cyclodextrins; 38 their use in ionic liquids; [39][40][41][42] as well as their noncovalent aggregation on surfaces 43,44 and as vescicles, [45][46][47][48] which occurs notwithstanding their high negative charge.…”

New Synthetic Routes to Polyoxometalate Containing Ionic Liquids

“…[53] The compound, POM-IL-5, (PsPy) 3 POMs dissolved in ionic liquids as solvents can therefore increasingly be found in literature. [56][57][58] Such a straight forward approach may suffice for many applications yet be insufficient for others as dissolution of POM salts in ILs always results in the introduction of two additional ionic species (i.e. the cationic part of the POM salt and the anionic part of the IL) which will alter the physical and chemical behavior of the mixture, thus leading to inadvertent effects, particularly at higher POM loadings (see Figure 11 on the next page).…”