1,4-Bis(imidazole)butane ligand and strontium(ii) directed 1-D chains based on basket-type molybdophosphates and transition metal (TM) linkers

Abstract

Five unclassical heteropoly blues, IJH 2 bib) 3 ij{TM II IJH 2 O) 2 }{Sr⊂P 6 Mo 2 V Mo 16 VI O 73 }]·nH 2 O (TM = Fe (1), Co (2), Ni (3), Cu (4), Zn (5)); bib = 1,4-bisIJimidazole)butane), have been hydrothermally synthesized and fully characterized. Compounds 1-5 are based on the basket-shaped ijSr⊂P 6 Mo 2 V Mo 16 VI O 73 ] 8− (abbreviated as {P 6 Mo 18 O 73 }) units, which consist of a vacant Dawson-type "basket body" {P 2 Mo 14 } unit and a "handle"-like {P 4 Mo 4 } fragment encasing a Sr 2+ cation in the central cage. All the compounds exhibit isostructural 1-D zigzag chains linked by a {TMIJH 2 O) 2 } unit, which are observed for the first time as 1-D basket-like assemblies connected by a TM linker. The optical band gaps of 1-5 show that they are semiconductor materials and potential photocatalysts. Compound 2 as a representative catalyst exhibits a universal highly efficient degradation ability for typical dyes MB, MO, and RhB under UV light and bifunctional electrocatalytic behavior for oxidation of AA and reduction of NO 2 − . V Mo 15 VI O 73 ], was reported by Zhang in 2004. 14 Then, two organic-inorganic hybrids CrystEngComm This journal is

Self-assembly of a novel multicomponent polyoxometalate-based tetrahedral supercluster with high catalytic activity for thioether oxidation

“…It's worth noting that these active coordination sites of P 6 Mo 18 are not fully utilized, so only a few simple P 6 Mo 18 -dimerized clusters but no giant P 6 Mo 18 -based polyhedral superclusters have been reported up to now. 21–23 In addition, inspired from the easy substitution of Mo in Keggin and Well–Dawson anions by transition metal ions, we believe that the same situation would also occur in P 6 Mo 18 . This would lead to the reduction of the overall electron cloud density of the basket-like P 6 Mo 18 and promotes the formation of reactive nucleophilic oxygen, 24 thus provide more chances for the construction of novel cluster-based giant superstructures.…”

A Co-MOF with a (4,4)-connected binodal two-dimensional topology: synthesis, structure and photocatalytic properties

“…The plots of ln(C 0 /C) against reaction time (min) are linear. Therefore, the kinetic behaviours for the degradation of MB and RhB can be assigned with the first-order model with the equation ln(C 0 /C) = kt [k is the rate constant (min À1 ) and t is the reaction time (min)] (Zhang et al, 2015(Zhang et al, , 2018Qian et al, 2019a). The k values are 0.0191 and 0.0129 min À1 for the degradation of MB and RhB, respectively.…”