Hourglass shaped polyoxometalate-based materials as electrochemical sensors for the detection of trace Cr(VI) in a wide pH range

Reduced phosphomolybdate as photoassisted electrochemical crystalline sensor for trace Cr(VI) detection

“…3(a) and Table S6 in the ESM). Such redox peaks can be assigned to the continuous multielectron gain/loss processes of Mo atoms in the hourglass-type Mn{P 4 Mo 6 } 2 cluster [40], ensuring a fast electron transfer and transmission during the electrochemical detection process. Moreover, the CV peak currents of compound 1 are positively correlated with the scanning rates, revealing the occurrence of a surface-controlled reaction mechanism on the surface of compound 1.…”

“…Up to now, hourglass-type phosphomolybdate clusters {M[P 4 Mo V 6 O 31 ] 2 } n− (abbreviated as M{P 4 Mo 6 } 2 , where M represents metal ions), have drawn considerable interest in photocatalysis and electrochemical detection fields owing to their excellent redox capability and semiconductor-like optical property [31][32][33][34][35][36][37][38][39]. Especially, all the Mo atoms in the M{P 4 Mo 6 } 2 cluster are in the +5 oxidation state [40], which endows them with high reducibility and a wide spectral absorption range that can be extended to the visible and even infrared light regions [34][35][36][37]. Moreover, the M{P 4 Mo 6 } 2 cluster has high electrochemical stability and can withstand continuous reversible electron gain and loss processes while maintaining structural integrity.…”

Solid-state supercapacitors based on polyoxometalate-based crystalline materials modified with polyaniline

“…The X-Ray photoelectron spectroscopy of complexes exhibits two peaks at 231.58 eV, 234.78 eV, and 232.43 eV, 235.8 eV, which indicates that Mo atoms are in the reduced state. The characteristic peaks of 782.28 eV, 786.78 eV, 797.88 eV, and 800.28 eV correspond to Co 2+ , and 645.13 eV, 657.13 eV correspond to Mn 2+ , respectively 45,46 (Fig. S4 †).…”

A new {P4Mo6}-based complex as a highly efficient heterogeneous catalyst for the oxidation of alkylbenzenes under mild conditions

“…[32][33][34] , in which the molybdenum atoms are at the highest valence, while the Mo V center in the {P 4 Mo 6 } unit is completely reduced. [35][36][37][38][39] Therefore, it has been applied in the field of catalysis and electrocatalysis. For example, our group used the Co-based {P 4 Mo 6 } complex obtained under solvent conditions to realize the photocatalytic oxidation process of aniline to azobenzene at room temperature.…”