Jiabao Weng

A new type of three-dimensional framework constructed from dodecanuclear cadmium(ii) macrocyclesElectronic supplementary information (ESI) available: Synthesis of 1 Figures S1‒S4. See http://www.rsc.org/suppdata/cc/b2/b212425d/This work was supported by the National Nature Science Foundation of China, Nature Science Foundation of Fujian Province and the Key Project of Chinese Academy of Science.

A new type of three-dimensional framework based on dodecanuclear Cd(II) macrocycles [[Cd2(dpa)(pya)]6(pya)6(dpe)3]n (1) (H2dpa = diphenic acid; Hpya = isonicotinic acid, dpe = 1,2-di(4-pyridyl)ethylene) was prepared by the hydrothermal reaction and in situ synthesis of pya from dpe precursor.

Syntheses and characterizations of two novel Ln(III)–Cu(II) coordination polymers constructed by Pyridine-2,4-dicarboxylate ligand

Abstract Two novel three dimension Ln(III)–Cu(II) coordination polymers [Gd 2 Cu(pydc) 4 (H 2 O) 6 ] n and [Sm 2 Cu 3 (pydc) 6 (H 2 O) 6 ] n were prepared by the hydrothermal reactions of CuO, Ln 2 O 3 (Ln = Gd, Sm), H 2 pydc (H 2 pydc = 2,4-pyridinedicarboxylic acid) and characterized by single-crystal X-ray diffraction analysis.

Syntheses, crystal structures and photoluminescent properties of two isophthalate-bridged complexes

Abstract Two interesting isophthalate-bridged coordination polymers, [Cd2(2,2′-bpy)2(ip)2]n (1) and [Zn2(2,2′-bpy)2(ip)2]n (2) (2,2′-bpy=2,2′-bipyridine, ip=isophthalate) have been hydrothermally synthesized and structurally characterized. X-ray single-crystal diffraction analyses reveal that compound 1 contains a three-dimensional polymeric channel with tetra Cdip as building units and compound 2 forms a double-helical structure linked by Zn2O4C2 cores. In 1, one Cd(II) center is six-coordinated and the other is seven-coordinated, while the two Zn(II) centers in 2 are in different six-coordinated environments.

Syntheses and Crystal Structures of Five Cadmium(II) Complexes Derived from 4‐Aminobenzoic Acid

Five cadmium(II) complexes, [CdClL·H2O]n (1), [CdBrL·H2O]n (2), CdI2(HL)2 (3), {[Cd(dca)2(HL)2]·2H2O}n (dca− = dicyanamide) (4), and (H2L)2[CdCl4(H2O)2] (5), have been synthesized by the reaction between 4-aminobenzoic acid (HL) and Cd2+. In 1 and 2, L− serves as a tridentate ligand and bridges six-coordinate CdII centers to form [CdII−L]n chains; halide anions link adjacent chains into two-dimensional layers. Complex 3 is a typical metallic carboxylic acid synthon. In 3, HL acts as a monodentate ligand coordinating to CdII through the nitrogen atom, and the head-to-tail hydrogen bonds of carboxylic groups result in a zigzag chain. The weak Cd···I interactions between adjacent chains extend the zigzag chain-like structure into a two-dimensional structure. Complex 4 consists of [Cd(dca)2(HL)2]n chains and free water molecules. The twelve-membered rings formed by water molecules and carboxylic groups through hydrogen bonds link the adjacent chains to yield a two-dimensional layer. Complex 5 consists of discrete [CdCl4(H2O)2]2− anions and H2L+ organic cations, which are linked by intermolecular hydrogen-bonding interactions to form a three-dimensional structure. (© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)

Synthesis and Crystal Structures of the First Two Novel Dicarboxylate Organotin Polymers Constructed from Dimeric Tetraorganodistannoxane Units

Assembly of nitroterephthalic acid (H2NTPA) or diphenic acid (H2DPA) with trimethyltin chloride under hydrothermal conditions produces a one-dimensional chain polymer [(Me2Sn)2(μ3-NTPA)(μ3-O)]n (1) or a two-dimensional corrugated sheet polymer [(Me2Sn)4(μ3-DPA)(μ4-DPA)(μ3-O)2]n (2), respectively. Both consist of different types of dimeric dicarboxylatotetraorganodistannoxane secondary building units. (© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)

Silver(I) complexes derived from versatile multidentate chelating ligand

Three novel Ag(I) coordination polymers, [{Ag3(bpsp)2·dmf·MeCN}(ClO4)3]n (1), [Ag2(bpsp)2](NO3)2 (2) and [{Ag4(bpsp)2(NO3)2·dmf}(NO3)2]n (3), were synthesized by self-assembly of AgX (X=ClO4−, NO3−) with bpsp (bpsp=2,6-bis[(2-pyrimidinyl)methylsulfanyl]-pyridine). X-ray single-crystal diffraction analyses showed that the versatile multidentate chelating ligand bpsp ligates coordinately flexible Ag(I) into 1 in a one-dimensional(1-D) zigzag chain polymer, 2 in a helical dimer and 3 in two independent 1-D zigzag chains (chain A and B), respectively. In 1, one bpsp ligand acts in an unusual pentadentate mode with two sulfur atoms and three nitrogen atoms from a pyridine ring and different pyrimidine rings coordinating to three different Ag atoms; the other bpsp ligand acts in a tridentate mode with three nitrogen atoms from the pyridine ring and different pyrimidine rings bridging three different Ag atoms. The bpsp ligand in 2 functions in another tridentate mode with one sulfur atom and a nitrogen atom of the pyridine ring chelating with Ag(I) and with one nitrogen atom of the pyrimidine ring ligating the other Ag(I) to form a binuclear silver(I) helicate. For chain A in 3, the bpsp ligand can serve in an unusual tetradentate fashion, in which a sulfur atom and a nitrogen atom of the pyridine ring chelate with the Ag atom to form a stable five-membered ring, and two nitrogen atoms from different pyrimidine rings bridge two Ag atoms in different directions. Similar to the bpsp molecule of pentadentate fashion in 1, bpsp molecule also serves as a pentadentate ligand in the chain B of 3. Ag atoms adopt three, one, and four different coordination fashions in 1, 2, and 3, respectively.

Chiral supramolecular assemblies derived from the insertion of a segmental ligand into a copper-tyrosine framework

The use of a predisposed 4,4-bipyridine segmental ligand in copper-tyrosine chiral complex self-assembly processes allows the preparation of a new type of complex {[Cu2(tyrosine)2(4,4-bipyridine)·2H2O]·2ClO4}n, which results in the fine tuning of network structure and stereo conformation. (© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)

Solvothermal Syntheses and Characterizations of Two Isomorphous One-Dimensional Chain Complexes Constructed by Orotic Acid

Solvothermal reactions of M(OAc)2 (M = Ni, Co) with orotic acid (2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid, H3L) in H2O/MeOH (1 : 1) gave rise to two new isomorphous polymeric complexes, [M(HL)(H2O)3]n [M = Ni, (4); Co, (5)], with one-dimensional chain structures. Both complexes crystallize in the orthorhombic space group P212121, with a 7.7438(7), b 7.7610(7), c 14.6528(12) A, Z 4 for (4), and a 7.7005(3), b 7.8725(3), c 14.6997(10) A, Z 4 for (5). X-Ray diffraction analysis shows that the metal ion is coordinated by nitrogen and oxygen atoms of an orotate ligand (HL2–) and water molecules in a distorted octahedral geometry. The hydrogen-bond interactions between chains leads to the formation of three-dimensional network structures.

Hydrothermal synthesis and characterization of the coordination polymer [Zn(bbdc)(H2O)]n (bbdc=4,4′-bibenzene-dicarboxylate) possessing a 3D network structure

Abstract A Zn coordination polymer [Zn(bbdc)(H2O)]n (bbdc=4,4′-bibenzene-dicarboxylate) with 3D network structure was prepared by the hydrothermal reaction of Zn(CH3CO2)·2H2O,H2bbdc and H2O in a molar ratio of 1:1:1556 at 170°C and characterized by single-crystal X-ray diffraction analysis. Each Zinc(II) center was coordinated by three oxygen atoms from bbdc ligand and one oxygen atom from water molecule to display a slightly distorted tetrahedral geometry.

A novel 1D ladder-like organic–inorganic hybrid compound [(Cu(bIz)2)]2[{Cu(bIz)2}2Mo8O26] (bIz=benzimidazole)

Abstract A novel organic–inorganic hybrid compound [(Cu(bIz)2)]2[{Cu(bIz)2}2Mo8O26] (1) has been synthesized from solvothermal reaction of benzimidazole, NaMoO4 and MoO3 with CuCl2·2H2O in H2O/CH3OH solution and characterized by single-crystal X-ray diffraction analysis. Crystallographic data for 1: monoclinic, space group C2/c, a=23.6823(2) A, b=20.2669(5) A, c=16.0220(3) A, β=109.030(1), Z=8, V=7269.8(2) A 3 . The compound consists of a centrosymmetric β-octamolybdate-supported complex anion [{Cu(bIz)2}2Mo8O26]2−, and two bis-bIz coordinated Cu(I) cations. The hydrogen bonds between [{Cu(bIz)2}2Mo8O26]2− anions generate a interesting 1D ladder. TG analysis, UV–Vis spectra and fluorescent spectroscopy of the compound were also studied.