Directed Synthesis of a 1D Double‐Chain Polyoxometalate Assembly: {[Ag₂(bppy)₃][Ag(bppy)₂][Ag(bppy)]₂PW₁₁Co(bppy)O₃₉}·2H₂O

A novel polyoxometalate-based metal-organic compound constructed from an unprecedented [Ag8(Hpyttz)4(H2pyttz)2] cluster and an in-situ [VW12O40]3− anion

“…The XPS spectra show that all the W atoms are in the +VI oxidation state, while all the V atoms are in the +V oxidation state (Fig. S2) [19,20], which is in agreement with the valence sum calculations. For the charge balance, one proton is added to the polyoxoanion.…”

Synthesis and characterization of the highest connected 3D Wells-Dawson POM/TMC hybrid

“…The bond distances around the Ag3 are similar to Ag1, namely, 2.24(2), 2.575(2), 2.268 (14) and 2.345(17) Å for Ag3-N3, Ag3-N2, Ag3-O1and Ag3-O34. But the bond angles are incomparable to those in Ag1, 86.83 (10) [11]) implies a weak binding, which results in slight difference from those in the tri-coordinated Ag complexes [12]. And Ag4 atoms are defined by one N atoms of one phnz molecule and two O atoms of P 2 W 18 clusters, the bond distances and angles are 2.14(4) Å for Ag-N, 2.355(17) Å for Ag-O, 88.9 (7)°for O-Ag-O and 107.6°for N-Ag-O.…”

A novel polyoxometalate tri-supported mixed-valent transition metal coordination complex

“…However, usually the highly reduced polyoxoanions are unstable and inclined to be oxidized in atmosphere. Therefore, it is still a great challenge to obtain stable POM supported transition metal coordination complexes.In Keggin supported transition metal coordination complexes, linking point of transition metal coordination complex with cluster can be divided into three situations: (I) terminal-oxygen atom of cluster [18,19,[22][23][24][25][26], (II) bridge-oxygen atom of cluster [21,27] and (III) both terminal-and bridge-oxygen atoms for multi-supported cluster [20,[28][29][30].Our group has focused on POM supported transition metal coordination complexes for years. We reported the first Keggin POM supported metal coordination complex [18] and consecutively reported several similar results [22][23][24].…”

“…A large number of Keggin polyoxoanion supported transition metal coordination complexes have been hydrothermally synthesized, including Keggin polyoxoanion mono- [18-24], bi-[25,26], tri-[27], tetra-[26,28,29], penta-[30] supported transition metal coordination complexes. In general, in order to isolate polyoxoanion supported transition metal coordination complexes, two strategies have been exploited to increase the surface charge density or activate the surface oxygen atoms of polyoxoanions [1]: (I) reduce the metal centres by reducing regents [18,26,27], for instance, from W VI to W V ; (II) replace metal centres with another lower-oxidation state metal [21,25,26,[28][29][30], for example, from Mo VI to V IV . However, usually the highly reduced polyoxoanions are unstable and inclined to be oxidized in atmosphere.…”