Guo-Wei Zhou

A novel heterometal-organic coordination polymer with chelidamic acid: nonlinear optical and magnetic properties

A novel 2-D heterometal-organic coordination polymer [AgCu2(C7H2NO5)(C7H3NO5)]n·2nH2O, obtained by a hydrothermal reaction, exhibits a (44) topology and good third-order nonlinear optical and magnetic properties, which may be a good candidate for NLO and magnetic multifunctional materials.

Synthesis and crystal structure of [Cu(4-OOCC6H4CN)2(4-HOOCC6H4CN)(H2O)2]·2(4-HOOCC6H4CN): a hydrogen bonded assembly of the first transition metal complex of 4-cyanobenzoic acid

Abstract The first transition metal complex of 4-cyanobenzoic acid, [Cu(4-OOCC6H4CN)2(4-HOOCC6H4CN)(H2O)2]·2(4-HOOCC6H4CN), has been prepared in aqueous medium. X-ray single crystal structure analysis reveals that it is a monometallic complex. Five-coordination Cu(II) ion is approximately in a square based pyramidal environment. Three-dimensional network of this compound is formed through O–H…N, O–H…O, C–H…O and C–H…N hydrogen bonding interactions, yielding a grid framework containing dimers of 4-cyanobenzoic acid with carboxylic dimer synthons locating in the channels.

Self-assembly of silver(I) coordination polymers with novel layered open network structures based on a flexible double betaine ligand

Three coordination polymers, [Ag4(L1)2(NO3)4]·H2O (1), [Ag(L1)](BF4)·2H2O (2) and [Ag2(L1)(H2O)](ClO4)2 (3), were obtained from self-assembly of AgX (X = NO3−, BF4−, or ClO4−) with a new flexible double betaine L1 (L1 = 1,3-bis(pyridinio-4-carboxylato)propane). Single crystal X-ray diffraction studies for complexes 1–3 reveal layered open network structures containing novel cavities and channels. Complex 1 consists of an unprecedented rhombic tetrameric Ag4O2 subunit, in which a μ3-η1 coordination mode of the carboxylate group is found for the first time among silver(I) carboxylates. Complex 2 is constructed from a bis(carboxylate-O,O′)-bridged centrosymmetric dimeric subunit, in which the coordination sphere of each silver(I) atom is completed by a monodentate carboxylate group at each axial site. In complex 3, the [Ag2(carboxylate-O,O′)2] dimeric subunits are extended into a polymeric chain through the linkage of each metal centre to carboxylate groups of an adjacent dimer, and such infinite chains are extended into a plane wave-like layer structure by the cross-linkage of the molecular skeletons of the flexible double betaine ligands.

catena-Poly[[[tetra-aqua-samarium(III)]-di-μ-isonicotinato-κO:O'] chloride].

In the structure of the title compound, {[Sm(C6H4NO2)2(H2O)4]Cl}n, the unique SmIII atom lies on a crystallographic twofold axis and is eight-coordinated by four O atoms from four isonicotinate ligands and four water molecules in a slightly distorted square-antiprismatic coodination environment. The SmIII atoms are bridged by two carboxylate groups of two isonicotinate ligands, forming an extended chain along the c-axis direction. These chains are cross-linked through hydrogen bonds, forming a three-dimensional framework, with channels which accommodate the chloride anions.

Catena-Poly tetraaquasamarium(III) -di-mu-isonicotinato-k(4)O : O ' chloride

In the structure of the title compound, {[Sm(C6H4NO2)2(H2O)4]Cl}n, the unique SmIII atom lies on a crystallographic twofold axis and is eight-coordinated by four O atoms from four isonicotinate ligands and four water molecules in a slightly distorted square-antiprismatic coodination environment. The SmIII atoms are bridged by two carboxylate groups of two isonicotinate ligands, forming an extended chain along the c-axis direction. These chains are cross-linked through hydrogen bonds, forming a three-dimensional framework, with channels which accommodate the chloride anions.

catena-Poly[[[tetra­aqua­samarium(III)]-di-μ-isonicotinato-κ4O:O′] chloride]

In the structure of the title compound, {[Sm(C6H4NO2)2(H2O)4]Cl}n, the unique SmIII atom lies on a crystallographic twofold axis and is eight-coordinated by four O atoms from four isonicotinate ligands and four water molecules in a slightly distorted square-antiprismatic coodination environment. The SmIII atoms are bridged by two carboxylate groups of two isonicotinate ligands, forming an extended chain along the c-axis direction. These chains are cross-linked through hydrogen bonds, forming a three-dimensional framework, with channels which accommodate the chloride anions.

Poly[[hexaaquabis(μ3-trans-propene-1,2,3-tricarboxylato)trimanganese(II)] 0.2-hydrate]

The title compound, {[Mn-3( C6H3O6)center dot 0.2(H2O)(6)]center dot 0.2H(2)O}(n), contains a three- dimensional open framework formed by each organic ligand mu(3)-bridging three six-coordinated Mn-II atoms (one of which resides on a twofold crystallographic axis). Uncoordinated water molecules are located in the channels of the framework along the c-axis direction. The primary O-H center dot center dot center dot O intermolecular interactions have O center dot center dot center dot O distances ranging from 2.680 (4) to 3.020 ( 13) angstrom and O-H center dot center dot center dot O angles ranging from 125 (4) to 179 (4)