Vanadium Substitution Dictates H Atom Uptake at Lindqvist-type Polyoxotungstates.

Understanding how modification of molecular structures changes the thermochemistry of H atom uptake can provide design criteria for the formation of highly active catalysts for reductive transformations. Herein, we describe the effect of doping an atomically precise polyoxotungstate with vanadium on proton-coupled electron transfer (PCET) reactivity. The Lindqvist-type polyoxotungstate [WO] displays reversible redox chemistry, which was found to be unchanged in the presence of acid, indicating an inability to couple reduction with protonation.

Mechanochemical Polyoxometalate Super-Reduction with Lithium Metal.

In this first systematic investigation of mechanochemical polyoxometalate (POM) reduction, (TBA)[PMoO] was reacted with equiv of lithium metal ( = 1-24) to generate products which were shown to be mixtures of electron-rich species. FTIR analysis revealed the lengthening/weakening of terminal Mo═O bonds with increasing levels of reduction, while EXAFS spectra indicated the onset of Mo-Mo bond formation at ∼ 8 and a significant structural change at > 12. Successive Mo reductions were monitored by XANES and XPS, and at = 24, results were consistent with the formation of at least one Mo-Mo bonded {Mo} triad together with Mo.

Harmonizing the Generation and Pre-publication Stewardship of FAIR bioimage data.

Together with the molecular knowledge of genes and proteins, biological images promise to significantly enhance the scientific understanding of complex cellular systems and to advance predictive and personalized therapeutic products for human health. For this potential to be realized, quality-assured bioimage data must be shared among labs at a global scale to be compared, pooled, and reanalyzed, thus unleashing untold potential beyond the original purpose for which the data was generated. There are two broad sets of requirements to enable bioimage data sharing in the life sciences.

Post transition metal substituted Keggin-type POMs as thin film chemiresistive sensors for HO and CO detection.

Chemiresitive sensing allows the affordable and facile detection of small molecules such as HO and CO. Herein, we report a novel class of Earth-abundant post transition metal substituted Keggin polyoxometalates (POMs) for chemiresistive sensing applications, with conductivities up to 0.01 S cm under 100% CO and 65% Relative Humidity (RH).