A new [Co₂₁(H₂O)₄(OH)₁₂]³⁰⁺ unit-incorporating polyoxotungstate for sensitive detection of dichlorvos

Abstract

<p>A new [Co₂₁(H₂O)₄(OH)₁₂]³⁰⁺ unit-incorporating polyoxotungstate (denoted as <bold>Co25Si6W60</bold>) has been hydrothermally synthesized and fully characterized. The unique <bold>Co25Si6W60</bold>-based biosensing system offers an environmentally-friendly route for detecting dichlorvos.</p>

An MIL-88A(Fe) rod-like metal–organic framework decorated with tungstophosphate polyoxoanions and nickel ferrite nanoparticles for the removal of antibiotics from water

“…Moreover, a CO group peak appeared at 1610 cm −1 in the POT sample. 52 A comparison of the spectra of the POT/NiFe 2 O 4 /MIL-88A(Fe) samples (Fig. 2(d)) reveals characteristic peaks associated with MIL-88A(Fe), POT and NiFe 2 O 4 particles after the formation of this nanocomposite.…”

{Ti6}/{Ti10} Wheel Cluster Substituted Silicotungstate Aggregates

“…When the pH is increased to about 8.0, 2 is obtained; its polyoxoanion contains a unique {Ti 10 } double-wheel cluster surrounded by two divacant SiW 10 O 37 and two trivacant SiW 9 O 35 fragments via Ti–O–W and Ti–O–Si linkages. It is worth noting that both SiW 10 O 37 and SiW 9 O 35 fragments are derived from the transformation of the SiW 9 O 34 precursor, of which the SiW 10 O 37 fragment has been found in previous studies, − whereas the configuration of SiW 9 O 35 fragment is brand new in POM chemistry. Furthermore, with 1 as a heterogeneous catalyst and H 2 O 2 as an oxidant, catalytic oxidation tests show the efficient and selective conversion of various sulfides to the corresponding sulfones.…”

40Ni-Added Poly(polyoxometalate) Assembled by {Ni6GeW9} and {Ni8(GeW9)2} Units: Structure, Magnetic, and Heterogeneous Catalysis Properties

“…Up to now, most of these reported TMAPs were synthesized by a conventional solution method. In contrast, our research team has been committed to the research of hydrothermal synthesis for many years, leading to the successful syntheses of various structurally new high-nuclearity TMAPs, including Ni 28 , Zr 24 , Co 25 , Ni 20 , Ni 22 , Ni 24 , and Ni 40 . However, taking a closer look at the synthetic details, most of the highly nuclear Ni-added POMs (NiAPs) have been prepared with the addition of organic amines. − Considering that organic amines can strongly coordinate to Ni 2+ ions, it could reduce the number of terminal aqua ligands in the catalytically active Ni centers, finally leading to decreased catalytic activities.…”