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Two-dimensional Coordination Network (two-dimensional + coordination_network)
Selected AbstractsSynthesis, Crystal Structure and Photoluminescent Properties of Two Novel Two-dimensional Coordination Networks Assembled by Lanthanide Salts and Carboxylate Ligand,CHINESE JOURNAL OF CHEMISTRY, Issue 1 2009Yajuan LI Abstract Two novel two-dimensional (2D) lanthanide(III) coordination polymers [Ln(PDC)(OH)(H2O)2]n (Ln=Eu (1) and Tb (2), H2PDC=pyridine-3,4-dicarboxylic acid) have been synthesized under hydrothermal conditions, and characterized by elemental analysis, IR, TGA and single-crystal X-ray diffraction. Both compounds show the same 2D layer containing 1D Ln,O,Ln chains, and the layers are further connected through hydrogen-bonding as well as ,-, stacking interactions into a three-dimensional supramolecular network. Furthermore, both compounds exhibit intense fluorescent emission bands in the solid state at room temperature. [source] A bis(amine,carboxylate) copper(II) coordination compound forms a two-dimensional metal,organic framework when crystallized from water and methanolACTA CRYSTALLOGRAPHICA SECTION C, Issue 9 2009Orde Q. Munro When {2,2,-[(2-methyl-2-nitropropane-1,3-diyl)diimino]diacetato}copper(II), [Cu(C8H13N3O6)], (I), was crystallized from a binary mixture of methanol and water, a monoclinic two-dimensional water- and methanol-solvated metal,organic framework (MOF) structure, distinctly different from the known orthorhombic one-dimensional coordination polymer of (I), was isolated, namely catena -poly[[copper(II)-,3 -2,2,-[(2-methyl-2-nitropropane-1,3-diyl)diimino]diacetato] methanol 0.45-solvate 0.55-hydrate], {[Cu(C8H13N3O6)]·0.45CH3OH·0.55H2O}n, (II). The monoclinic structure of (II) comprises centrosymmetric dimers stabilized by a dative covalent Cu2O2 core and intramolecular N,H...O hydrogen bonds. Each dimer is linked to four neighbouring dimers via symmetry-related (opposing) pairs of bridging carboxylate O atoms to generate a `diamondoid' net or two-dimensional coordination network. Tight voids of 166,Å3 are located between these two-dimensional MOF sheets and contain a mixture of water and methanol with fractional occupancies of 0.55 and 0.45, respectively. The two-dimensional MOF sheets have nanometre-scale spacings (11.2,Å) in the crystal structure. Hydrogen-bonding between the methanol/water hydroxy groups and a Cu-bound bridging carboxylate O atom apparently negates thermal desolvation of the structure below 358,K in an uncrushed crystal of (II). [source] A unique two-dimensional coordination network of 1-benzofuran-2,3-dicarboxylate with lanthanum(III) obtained by solvothermal synthesisACTA CRYSTALLOGRAPHICA SECTION C, Issue 4 2009Rajesh Koner The title compound, poly[bis[diaqualanthanum(III)]-tris(,-1-benzofuran-2,3-dicarboxylato)], [La2(C10H4O5)3(H2O)4]n, was obtained under solvothermal conditions by reacting lanthanum trinitrate hexahydrate with 1-benzofuran-2,3-dicarboxylic acid in a strongly basic environment. It forms an extended two-dimensional coordination network, wherein every lanthanum ion links to four deprotonated diacid ligands, while two of the latter bridge between adjacent metal cations. The component species are additionally linked to one another by hydrogen bonds. The polymeric arrays are tightly stacked one on top of the other, without incorporating any solvent in the interface zones between them, which are lined with the lipophilic benzofuran residues. This study provides the first example of coordination networking with the aid of the 1-benzofuran-2,3-dicarboxylate ligand. [source] | ||||||||||