Abstract
An imidazole encapsulating indium phosphate with an In:P ratio of 4:7 and a new pillared layer structure has been synthesized under solvothermal conditions and characterized by single-crystal X-ray diffraction, 31P CPMAS NMR, and thermogravimetric analysis. [Crystal data: [In8(HPO4)14(H2O)6](H2O)5(H3O)(C3N2H5)3, Mr = 2686.72, trigonal, space group P−3c1 (No. 165), a =13.859(2) Å, c =19.186(8) Å, V = 3193(4) Å3, Z = 2, R = 3.6%, Rw = 3.7% (1650 observed data with I > 3σ(I))]. The structure consists of layers assembled from InO6 and InO5(OH2) octahedra and PO3(OH) tetrahedra which are pillared through additional InO6 octahedra to produce a three-dimensional framework. The framework contains a two-dimensional array of channels in which imidazolium cations, hydroxonium ions, and water molecules reside. Within the channels are 16-membered rings of alternating In and P polyhedra which have dimensions ∼8.6 × 9.7 Å.
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