NDLI: Inorganic–organic hybrid compounds based on octamolybdates and metal–organic fragments with flexible multidentate ligand : syntheses, structures and characterization

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Ma, Jian-fang Wu, Hua Yang, Jin Ma, Ji-cheng Liu, Hai-yan Liu, Ying-ying
Description	Author Affiliation: Liu HY ( Key Lab of Polyoxometalate Science, Department of Chemistry, Northeast Normal University, Changchun, 130024, People's Republic of China.)
Abstract	Six polyoxometalate-based ( POM ) hybrid materials based on octamolybdate building blocks and metal–organic fragments with flexible multidentate ligand , namely $[Cu^{II}_{2}(ttb)_{2}(β-Mo_{8}O_{26})(H_{2}O)_{2}]·2H_{2}O$ (1), $Cu^{I}_{4}(ttb)_{2}(β-Mo_{8}O_{26})(H_{2}O)$ (2), $[Cu^{I}_{4}(ttb)_{3}(β-Mo_{8}O_{26})]$ (3), $[Ni_{2}(ttb)_{2}(β-Mo_{8}O_{26})(H_{2}O)_{6}]·2H_{2}O$ (4), $[Zn_{2}(ttb)_{2}(α-Mo_{8}O_{26})(H_{2}O)_{2}]$ (5), and $[Ag_{4}(ttb)_{2}(β-Mo_{8}O_{26})]$ (6), where ttb = 1,3,5-tris(1,2,4-triazol-1-ylmethyl)-2,4,6-trimethyl benzene, have been synthesized under hydrothermal conditions. Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by elemental analyses, TGA , IR spectra , and electrochemistry. Compounds 1 and 2 exhibit three-dimensional (3D) 2-fold interpenetrating frameworks with (3,6)-connected $(4^{1}·6^{2})(4^{2}·6^{10}·10^{3})$ and (3,4)-connected $(6^{2}·8^{1})_{2}(6^{2}·8^{4})$ topologies, respectively. We are not aware of any other examples of interpenetrating (3,6)- and (3,4)-connected frameworks which involves the octamolybdates. Compound 3 shows a rare two-dimensional (2D) 2-fold interpenetrating network structure. In compound 4, a 3D supramolecular framework with the channels is constructed by the hydrogen-bonding interactions between $(β-Mo_{8}O_{26})^{4−}polyanions$ and the Ni-ttb double layers, in which the guest $(β-Mo_{8}O_{26})^{4−}$ anions are included. If Zn⋯O interactions are considered, the structure of 5 is a 3D (3,4)-connected framework with $(4·8^{2})(4·8^{2}·10^{3})$ topology. In 6, the ttb ligand as a tetradentate ligand links the Ag atoms to yield a 2D POM-based network. By careful inspection of the structures of 1–6, it can be seen that the ttb ligand , the metal ion and the coordination mode of the octamolybdate anion play important roles in the formation of the POM-based MOFs.
ISSN	14779226
Issue Number	3
Volume Number	40
e-ISSN	13645447
Journal	Dalton Trans.
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2011-01-21
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Coordination Complexes Chemical Synthesis Ligands Molybdenum Chemistry Copper Crystallography, X-Ray Molecular Conformation Oxides Spectroscopy, Fourier Transform Infrared Tungsten Compounds Journal Article Research Support, Non-U.S. Gov't
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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