Carbon dioxide (CO 2 ) and sulfides in gasoline are the main causes of air pollution. Considerable attention has been devoted to solving the problems, and the catalytic reaction seems to be a good choice. Owing to the high density of Lewis acid (LA) active sites and large numbers of open methoxide groups, polyoxovanadates (POVs) are an undisputed option as a heterogeneous catalyst for the CO 2 cycloaddition reaction and catalytic oxidation of sulfides. On the basis of the above, a series of, have been legitimately designed and triumphantly isolated. In the synthesis process, three different kinds of Lewis bases (LBs), ethanediamine, 1,2-diaminopropane, and 1,2-cyclohexanediamine, were used to modify LA {V 8 } clusters to form four diverting windmill-shaped configuration. Among them, the vanadium atoms in V 8 -1a are +4 valence of V IV , while the vanadium atoms in V 8 -1−3 are mixed valence states of V IV and V V . Magnetic property investigation indicates that the antiferromagnetic coupling interactions between V IV ions all exist in the four compounds. The compound V 8 -1 also demonstrated high catalytic activity in the cycloaddition of CO 2 to several epoxides under relatively mild conditions (70 °C, 0.5 MPa). More importantly, the reaction pressure 0.5 MPa is the lowest among the high nuclear polyoxometallates (POMs). Furthermore, V 8 -1 also has an excellent catalytic conversion for the oxidation of sulfides. The catalytic tests manifested that V 8 -1 was a very efficient difunctional heterogeneous catalyst for CO 2 cycloaddition reaction and catalytic oxidation of sulfides.

diamino-5,5′-bis(1H-1,2,4-triazole)) have been successfully designed and synthesized via a hydrothermal method. Structure analysis revealed that the inorganic moieties in compounds 1 and 2 are made up of hourglass-type {M[P 4 Mo 6 ] 2 } (M = Cd/Co) structure, which were constructed by two (P 4 Mo 6 ) units with single transition metal (TM) (Cd/Co) atom as the central metal. The {M[P 4 Mo 6 ] 2 } (M = Cd/Co) structures were then further connected by TM to constitute a 2D layered structure. Surprisingly, under the condition of 60 °C and 98% RH, compounds 1 and 2 exhibited excellent proton conductivity of 1.35 × 10 −3 and 3.78 × 10 −3 S cm −1 , respectively. Furthermore, compound 2 can act as heterogeneous catalyst for CO 2 photoreduction, which indicates that it may be a bifunctional POM-based material with great promise.

An isolated doughnut-like molybdenum(V) cobalto-phosphate cluster with the formula (C11NH10)2{[Co(H2O)6]@[H29Co16Mo16(H2O)16(PO4)24O36)]}(H2PO4)·25H2O has been successfully synthesized by hydrothermal method. Single crystal X ray diffraction analysis shows that four {Co4O60} tetramers and eight...

A pure inorganic cluster, H 47 Na 2 Co 4 Mo 24 (PO 4 ) 11 O 72 • 15H 2 O (denoted as {Co 4 Mo 24 }), has been successfully synthesized by hydrothermal method. Notably, the assembly of a central {Co 2 PO 4 } tetrahedron and four peripheral {Co[P 4 Mo 6 ]} fragments gives rise to a rare "quasi-Keggin" structure of {Co 4 Mo 24 }, in which Co linkers continue to bridge adjacent substructures, resulting in the generation of 3D framework with large cavities. Benefitting from the combination of strong reductive {P 4 Mo 6 }units and Co active centers, the photocatalytic system with {Co 4 Mo 24 } as heterogeneous catalyst exhibits excellent activity for CO 2 conversion to CO, offering the CO formation rate of 1848.3 μmol g À 1 h À 1 with high selectivity of 97.0 %. Besides, thermogravimetric and X-ray diffraction analysis confirm that {Co 4 Mo 24 } can maintain stable during the photocatalytic reaction process.

Two heterometallic cluster {Ln8Cr4} were constructed from two classical “drum-like” {Ln4Cr2} building units associated by organic ligands HIN, displaying 1D wave chain structure. The MCE values for {Gd8Cr4} at 3 K and 7 T is 23.40 J kg−1 K−1.