摘要：
Two new cobalt(II) complexes [Co-2(2,2'-bipy)(2)(dpa)(2)(H2O)(5)]center dot 4H(2)O (1) and Co(2,2'-bipy)(3)(SO (4))center dot 7.5H(2)O (2) have been synthesized with diaphonic acid (H(2)dpa) and 2,2'-bipyridine (2,2'-bipy) as ligands. In 1, two neighboring cobalt(II) ions are linked together by one bridging diaphonic acid group, forming an asymmetric dinuclear structure. 1 crystallizes in triclinic, space group P (1) over bar with alpha = 9.825(6), b = 13.007(8), c = 19.586(1) angstrom, alpha = 80.773(1)degrees, beta = 77.065(1)degrees, gamma = 85.902(1)degrees, M-r = 431.4, V = 2406.5(3) angstrom(3), D-c = 1.48 g/cm(3), Z = 2, mu(MoK alpha) = 0.767 mm(-1), F(000) = 1112, the final R= 0.0379 and wR = 0.0862. The central cobalt(II) ions in 1 and 2 are coordinated with six atoms, forming distorted octahedral coordination geometry. The fluorescence and thermal stability properties of 1 and 2 are also reported.
摘要：
A new complex [Zn3L6(2, 2′-bipy)2] with 2, 4-dichlorophenoxy acetic acid (HL) and 2, 2′ -bipyridine as the ligands has been synthesized. The crystal data for this complex are as follows: triclinic, space group P1̄, a= 1.073 85(6) nm, b=1.329 58(7) nm, c=1.515 80(10) nm, α=66.961 0(10)°, β=69.387 0(10)°, γ=72.992 0(10)°, V= 1.833 77(19) nm3, Dc=1.656 g · cm-3, Z=1, μ(Mo Kα)=1.483 mm-1, F(000)=920, final discrepancy factors R1=0.030 6, wR2=0.075 7. The crystal structure shows that the title complex forms trinuclear structure by bridging 2, 4- dichlorophenoxy acetic acid anions. Zn(II) ion in middle position is coordinated with six oxygen atoms, giving a six-coordinated distorted octahedral geometry. Compared with Zn (II) ion in middle position, Zn (II) ion in end position is located in a five-coordinated distorted trigonal bipyramid environment. The magnetic, luminescence and electrochemical properties of the title complex are also studied. The results show that the title complex is a diamagnetism system in temperatures range of 28~300 K, and when the exciting radiation set at 664 nm, the title complex can give off one broad emission band at around 660 nm. The electron transfer is quasi reversible in the electrode reaction, corresponding to Zn(II)/Zn(0).
摘要：
Two new 3d-4f heterometallic coordination polymers [Mn(0.5)Ln(INAIP)(2)(H2O)(2)]center dot 2H(2)O [ Ln = Eu (1), Gd (2)] have been prepared by hydrothermal reactions of the corresponding lanthanide salt with 5-(isonicotinamido) isophthalic acid (H(2)INAIP) in the presence of MnCO3 and NaOH. Both complexes have been characterized by single crystal X-ray diffraction analyses, elemental analyses, infrared absorption spectra, and thermogravimetric analyses. The results of structural analyses show that 1 and 2 are isostructural and feature non-interpenetrated 3D coordination framework containing 2D (4,4) lanthanide-carboxylate layers. They have the same 3D structure with trinodal (3,3,4)-connected new topology net with Point (Schlafli) symbol (8(3))(4)(8(4).10(2))(8(6))(2). In addition, photoluminescence and magnetic properties were also investigated. (C) 2011 Elsevier B. V. All rights reserved.
摘要：
The novel complex [Zn_2(Mba)_3(Phen)_2EtOH)]·ClO_4 (Hmba=methoxybenzoic acid, Phen=1,10-phenanthroline, EtOH=ethanol) was synthesized by hydrothermal reactions, and its structure was determined by X-ray diffraction. The crystal belongs to the triclinic system, space group Pi with a=1.15362(1), b=1.3655(3), c=1.61451(1) nm, α=72.842(2), β=83.259(3), γ=72.083(2)°, V=2.3112(6) nm3, Z=2, μ(MoKα)=11.71 cm~(-1), F(000)=1120, R=0.0552 and wR=0.1157 (I > 2σ(I)). The two centric zinc(Ⅱ) ions in the complex locate in a distorted octahedral coordination geometry and a distorted trigonal bipyramid coordination geometry, respectively. Two bridging bidentate carboxyl groups and a μ_2-O carboxyl group from three methoxybenzoic acids act as the bridge to link two Zn(Ⅱ) ions. The asymmetric units are connected by π-π packing interactions between aromatic rings to form a three-dimensional supramolecular network. The experimental results show a good fluorescence property for the complex.
