Search

Seven polyoxometalate (POM) hybrid materials based on Keggin polyanion building blocks and copper(I)–organic frameworks with pyrazine derivatives, namely, [CuI4(2Et,3Me-Pyr)5(SiW12O40)] (1), [CuI4(2,6-Pyr)4(SiW12O40)] (2), [CuI4(2,5-Pyr)4(SiW12O40)(H2O)2] (3), [CuI4(2,3,5,6-Pyr)4(SiW12O40)](H2O) (4), [CuI4(2,5-Pyr)4(PMoVI11MoVO40)]·1.5H2O (5), [CuI3(2,3,5-Pyr)4(PMo12O40)]·H2O (6), and [CuI4(2Et,3Me-Pyr)5(PMoVI11MoVO40)] (7), where 2Et,3Me-Pyr = 2-ethyl-3-methylpyrazine, 2,6-Pyr = 2,6-dimethylpyrazine, 2,5-Pyr = 2,5-dimethylpyrazine, 2,3,5-Pyr = 2,3,5-trimethylpyrazine, and 2,3,5,6-Pyr = 2,3,5,6-tetramethylpyrazine, have been synthesized under solvothermal conditions. In 1 and 7, polyanions link CuI–organic sheets to generate 3D (3,4)-connected frameworks. In 2, the polyanion bridges CuI–organic chains to yield a 3D (3,4,6)-connected framework. Both 3 and 4 exhibit 2D double layer structures. In 5, the Keggin polyanion bridges the CuI–Pyr chains to form an infinite 3D (3,4)-connected framework. In 6, CuI c...

Eight new metal−organic frameworks based on the tetrakis(imidazole) ligand tetrakis(imidazol-1-ylmethyl)methane (L), namely, [Zn2(L)(SO4)2]·2H2O (1), [Co(L)(SO4)]·1.25H2O (2), [Zn2(L)(L1)2]·3.5H2O (3), [Co2(L)(L1)2]·2.5H2O (4), [Zn2(L)(L2)(H2L2)2]·5H2O (5), [Co1.5(L)(L2)] (6), [Zn2(L)(L3)]·4H2O (7), and [Co(L)(H2O)2]·(H2L3)·1.5H2O (8), where H2L1 = 1,4-benzenedicarboxylic acid, H3L2 = 1,3,5-benzenetricarboxylic acid, and H4L3 = 1,2,4,5-benzenetetracarboxylic acid, have been synthesized under hydrothermal conditions. Compounds 1 and 2 were isolated by the reactions of L with inorganic SO42− anions. Compound 1 displays a 2-fold interpenetrated PtS net. Compound 2 possesses a binodal (4,6)-connected topology with the Schlafli symbol of (3·4·53·6)(32·4·54·67·7). Compounds 3−8 have been obtained by the reactions of L with organic carboxylate ligands. Compound 3 shows a trinodal (3,4)-connected topology with the Schlafli notation of (66)(65·8)(63). Compound 4 is isostructural with 3. The compound 5 is a binodal...

Thirteen Cd(II)-containing coordination polymers based on the novel tetradentate ligand tetrakis(imidazol-1-ylmethyl)methane (L), namely, [Cd2(L)2(SO4)2(H2O)2]·4H2O (1), [Cd(L)(H2O)2](NO3)2 (2), [Cd(L)(Br)2]·H2O (3), [Cd(L)0.5(L1)] (4), [Cd5(L2)5(H2O)2]·6H2O (5), [CdL3(L)0.5] (6), [CdL4(L)0.5(H2O)]·H2O (7), [Cd2(L5)2(L)]·2H2O (8), [Cd3(L6)2(L)]·4H2O (9), [Cd3(L7)2(L)(H2O)2]·2.5H2O (10), [Cd(HL8)(L)]·0.75H2O (11), [Cd7(L9)3(μ3-OH)2(L)2]·8H2O (12), [Cd2(L10)(L)(H2O)2]·H2O (13), where H2L1 = fumaric acid, H2L2 = adipic acid, H2L3 = 1,3-benzenedicarboxylic acid, H2L4 = 1,4-benzenedicarboxylic acid, H2L5 = 5-OH-1,3-benzenedicarboxylic acid, H3L6 = 1,3,5-benzenetricarboxylic acid, H3L7 = 1,2,3-benzenetricarboxylic acid, H3L8 = 1,2,4-benzenetricarboxylic acid, H4L9 = 1,2,4,5-benzenetetracarboxylic acid, and H4L10 = 4,4′-oxidiphthalic acid, have been synthesized under hydrothermal conditions. Compound L·5H2O shows a novel three-dimensional (3D) (3,8)-connected supramolecular architecture with a unique (3·52)2(34·...