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In situ lead-MOF derived from 2-Methyl-3-acetylnaphtho[2,3- b]furan-4,9-dione (MAFD), [PbO(OH)(1,2-BDC)(HO)] 1, 1,2-BDC = CH(COOH), phthalic acid, has been synthesized and characterized by elemental analysis, IR, TG-DTA, powder X-ray diffraction (XRD) and single crystal X-ray diffraction. Compound 1 possesses 2-D inorganic layer structure built from rare tetranuclear unit [( μ-O)Pb]. In 1, both crystallographic distinct Pb(1) and Pb(4) ions adopt six-coordination geometry, and the other two crystallographic distinct Pb(2) and Pb(3) ions display eight-coordination geometry under the condition of Pb-O bond length extended to 3.10 Å. A 3-D supramolecular network is also formed by hydrogen bonds (C-H···O). Result of photoluminescence measurement indicates an emission band at 385 nm ( λ = 209 nm). [ABSTRACT FROM AUTHOR]

The crystal structure of hydrate adduct of 6-benzylaminopurine and 5-sulfosalicylic acid [(C12H12N5)(C7H5O6S)·H2O] 1 is studied. It crystallizes in monoclinic system space group P21/ n with a = 6.2128(9) Å, b = 20.762(3) Å, c = 15.675(2) Å, β = 92.040(2)°, V = 2,020.6(5) Å3, Z = 4, Rgt( F) = 0.0494, wRref( F2) = 0.1112, and T = 173(2) K. Single-crystal X-ray diffraction analysis reveals that the asymmetric unit of 1 contains one 6-benzylaminopurine molecule and one 5-sulfosalicylic acid molecule, as well as one lattice water molecule. In 1, hydrogen bonds link the two monomers into one-dimensional double chain, two-dimensional layer network, and further a 3-D supramolecular network. Short ring-interactions with intra-chain π– π stacking are observed (distances between ring centroids are 3.964, 3.796 and 3.571 Å, and the dihedral angle between planes are 6.97°, 5.55°, and 5.66°, respectively). A novel hydrate adduct [(C12H12N5)(C7H5O6S)·H2O] 1, has been synthesized and consists of 6-benzylaminopurine and 5-sulfosalicylic acid molecules with one lattice water molecule. The monomers connect with each other via intermolecular hydrogen bonds C(N, O)–H···O(N) to form double chain, further two-dimensional layer, at last 3-D supramolecular structure network, along with π– π interactions within 4 Å. [Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]