Synthesis, crystal structure and photoluminescent property of a novel indium (III) supramolecular 3D framework

A new metal–organic framework [In2(OH)2(1,3-BDC)2(2,2′-bipy)2] 1 (1,3-benzenedicarboxylate = 1,3-BDC, 2,2′-bipyridine = 2,2′-bipy) has been hydrothermally synthesized from the reaction of In(NO3)3, 1,3-BDC and 2,2′-bipy. Single-crystal X-ray diffraction analysis reveals that compound 1 crystallizes in the triclinic space group P-1 (No. 2), a = 8.6461 Å, b = 9.9234 Å, c = 10.1799 Å, α = 78.1801°, β = 75.1646°, γ = 72.7427°, V = 798.40 Å3, Z = 2. Compound 1 contains double-chain-like ribbons which are constructed by In2(OH)2(2,2′-bipy)2∞2+ units and 1,3-BDC ligands. The adjacent ribbons are packed and exhibit interesting 3D supramolecular networks. The further characterizations of compound 1 have been performed by fluorescent spectroscopy, powder X-ray diffraction, IR spectroscopy, thermogravimetric analysis (TGA), ICP-AES and elemental analyses.