Synthesis and Characterization of a Novel Organic/Inorganic Hybrid Based on Octamolybdates and Benzimidazole Molecules [Hbenzimi]4 [(benzimi)2Mo8O26] · 2H2O (benzimi = benzimidazole)

Abstract

A novel organic/inorganic compound [Hbenzimi] 4 [(benzimi) 2 Mo 8 O 26 ] AE 2H 2 O (1) has been prepared hydrothermally and characterized by elemental analyses, i.r., x.p.s., t.g. and single crystal X-ray diffraction. The single crystal X-ray diffraction analysis reveals that compound (1) consists of the [Mo 8 O 26 ] 4) cluster as the structural motif covalently linked by benzimidazole molecules and protonated benzimidazole molecules as charge compensation cations. It is interesting that the benzimidazole molecules were synthesized from 1,2-phenylenediamine and oxalic acid. The [Mo 8 O 26 ] 4) polyoxoanions and organic ligands in compound (1) interact with each other via extensive hydrogen bonds to form a three-dimensional supramolecular framework.

New polyoxomolybdate compounds synthesized in situ using ionic liquid 1-butyl-3-methyl-imidazolium tetrafluoroborate as green solvent

“…81 At least 8 phases of the octamolybdate anion are known. 82 3À anion, and in the CSD, this anion was found to combine with cations such as tetrabutylammonium, 86 bipyridinium, 87 dimethylpyridinium, 88 pyridazinium, 89 pyrimidinium, 89 pyrazinium, 89 prolinium, 90 dihydroxy hydroxymethyl propylammonium, 91 and phenylenedimethylene diimidazolium. 91 Close-contact OÁ Á ÁO distances range from 3.01 to 4.01 Å (Fig.…”

Synthesis and Proton Conductivity of Two Molybdate Polymers Based on [Mo8O26]4− Anions

“…Octamolybdate is a kind of isopolyanion. [18][19][20] As a result of three different coordination units, [MoO 4 ], [MoO 5 ], and [MoO 6 ] polyhedral, eight α, β, γ, ζ, δ, ε, η and θ-isomers are common. [21] Octamolybdate has a unique affinity for coordination with the metal-organic fragments.…”

“…POMs are generally classified into isopolyanion and heteropolyanion. Octamolybdate is a kind of isopolyanion [18–20] . As a result of three different coordination units, [MoO 4 ], [MoO 5 ], and [MoO 6 ] polyhedral, eight α, β, γ, ζ, δ, ϵ, η and θ ‐isomers are common [21] .…”

Thermal Decomposition and Dehydration Kinetics of Tetra(piperidinium) Octamolybdate Tetrahydrate in Air

“…[1][2][3] Octamolybdates are an important branch of polyoxometalate chemistry due to their varied structural patterns in the solid state. 4 The thermal behaviour is one of the important properties of solid octamolybdates.…”