Molecular Assemblies Based on Polytungstate Clusters and the Flexible Organic Ligand 1,3‐Bis(4‐pyridyl)propane

Abstract

Four polyoxometalate (POM) assemblies based on the flexible organic ligand 1,3-bis(4-pyridyl)propane (bpp) 4). Compounds 1 and 2 were prepared by the reaction of the classical Keggin-type anions with organic bpp under hydrothermal conditions. The difference between these compounds is that protonated bpp is found in 1, whereas in 2 Cu I -bpp fragments are present. In the framework of 1, organic and hybrid chains, built upon supramolecular interactions, coexist. Compound 2, which crystallizes in a chiral space group, has a 2D wave-like struc-

Reduced Phosphomolybdates as Molecular Catalysts for Hexavalent Chromium Reduction

“…[21] Hydrogen bonding and van der Waals interactions are the main contributors to the noncovalent contacts that exist in 1-3. [30] In addition, there are complex O-H···O interactions between the anionic clusters and water molecules, as well as the N-H···O and C-H···O interactions between organic cations and inorganic anions. The main difference among …”

Manganese-phosphomolybdate molecular catalysts for the electron transfer reaction of ferricyanide to ferrocyanide

“…Our recent research has focused on POM-based supramolecular assemblies by utilizing the noncovalent weak forces that occur between the surface oxygen atoms of POMs and organic molecules. [17][18][19][20][21][22] A feature of these hybrids is their good structural stability both in water and common organic solvents, which is convenient for their applications as heterogeneous catalysts. With these considerations in mind, three functional analogs 23 have been isolated.…”

Architectural chemistry of polyoxometalate-based coordination frameworks constructed from flexible N-donor ligands

“…The exibility can be adjusted by changing the space length of the -(CH 2 ) nlinkage, it and plays a signicant role in constructing fascinating POMCFs. To date, plenty of exible N-donor ligands have been designed and introduced into POMCFs (Scheme 2), including bis-pyridine, 29,[38][39][40][41][42][43][44][45][46] bis-imidazole, [47][48][49][50][51][52][53][54][55][56][57][58][59][60][61] bis-triazole, [62][63][64][65][66][67][68][69][70] bis-benzimidazole, 71 bis-tetrazole, 72,73 bis-pyridyl-bisamide, 16,74,75 bis[2-(4-pyridyl)benzimidazole] derivatives. 76 Moreover, to date, abundant POMCFs with diverse architectures modied by exible N-donor ligands have been isolated.…”