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  • Zinc metal-organic framewor...
    Karmakar, Anirban; Guedes da Silva, M Fátima C; Pombeiro, Armando J L

    Dalton transactions : an international journal of inorganic chemistry, 06/2014, Letnik: 43, Številka: 21
    Journal Article

    Three new compounds bearing different flexible side functional groups, viz. 2-acetamidoterephthalic acid (H2L1), 2-propionamidoterephthalic acid (H2L2) and 2-benzamidoterephthalic acid (H2L3), were synthesized and their coordination reactions with zinc(II) were studied. X-ray crystallography showed the formation of novel metal organic frameworks with different dimensionalities, where the side functional groups of amidoterephthalic acid and/or auxiliary ligands were found to play significant roles. These frameworks Zn2(L1)2(4,4'-bipyridine)2(H2O)(DMF)n (1), Zn4(L2)3(OH)2(DMF)2(H2O)2n (2) and Zn(L3)(H2O)2n·n/2(1,4-dioxane) (3) act as heterogeneous polymeric solid catalysts not only for the diastereoselective nitroaldol (Henry) reaction of different aldehydes with nitroalkanes but also for transesterification reactions. These MOF-based heterogeneous catalysts can be recycled without losing their activity.