Hetero-bimetallic Complex of a 2D Coordination Network Constructed by Sodium Ion and p-Sulfonatothiacalix[4]arene

A 2D coordination polymer built by sodium ion and water-soluble p-sulfonatothiacalix[4]arene of trivalent yttrium complex [Na（H2O）2Y（H2O）6（DMF） （p-sulfonatothiaca lix[4]arene）]-9H2O is reported. The complex belongs to the monoclinic system, space group P2 1/c, with a = 16.703（3）, b = 17.819（4）, c = 17.357（4）A, β = 106.23（3）°, Z = 4, V = 4960.0（17）A^3, Mr = 1304.08, Dc = 1.746 g/cm^3,μ= 1.624 mm^-1, F（000） = 2688, the final R = 0.0398 and wR = 0.1132 for 7534 observed reflections with I 〉 2σ（I）. One yttrium（Ⅲ） ion is coordinated by the thiacalixarene ligand via the sulfonato group, and also ligated by an oxygen atom of a DMF molecule occupying the cavity of thiacalixarene and six aqua ligands.

Synthesis and Crystal Structure of a 2D Sm(Ⅲ) Coordination Polymer: {[Sm_2L_3(H_2O)_4]·(4,4?-bpy)·3H_2O}_n

A new compound, {[Sm^2L3（H2O）4]·（4,4＇-bpy）·3H2O}n（1, H2 L = 5-（3-pyridyl methoxy） isophthalic acid, 4,4＇-bpy = 4,4A-dipyridyl）, has been hydrothermally synthesized and characterized by single-crystal X-ray diffraction. It crystallizes in triclinic, space group P1 with a = 11.266（2）, b = 15.530（3）, c = 16.711（3） A, α = 112.803（3）, β = 90.526（1）, γ = 94.006（3）°, V = 2686.6（9） A3, Z = 2, Dc = 1.727 g/cm^3, μ = 2.251 mm-1, F（000） = 1392, S = 0.999, the final R = 0.0296 and wR = 0.1058. In the title compound, two crystallographically independent Sm^3＋ cations are bridged by the carboxyl group of L2- ligands to form two different {Sm^2} binuclear subunits which are further connected by two distinct L2- ligands to shape a 1D chain, and such 1D chains are linked up to generate a 2D coordination polymer by another crystallographically unique L2- ligand. The thermogravimetric analysis and luminescent property of the title compound were also investigated.

Hydrothermal Synthesis, Crystal Structure and Thermal Analyses of Pyrazine-2,3-dicarboxylic Acid Bridged Co(II) Coordination Polymer of _∞~2[Co(phen)(μ-L)_(3/3)]·H_2O (H_2L = Pyrazine-2,3-dicarboxylic Acid)

A novel pyrazine-2,3-dicarboxylic acid bridged Co(II) phen complex 2 ∞ [Co- (phen)(μ-L)3/3]?H2O (H2L = pyrazine-2,3-dicarboxylic acid) has been hydrothermally synthesized, and X-ray single-crystal diffraction analysis shows that it crystallizes in the monoclinic system, space group P21/n with a = 11.480(2), b = 11.885(2), c = 12.939(3) ?, β = 110.55(3)°, V = 1653.1(6) ?3, Mr = 423.25, Dc = 0.425 g/cm3, Z = 4, R = 0.0361 and wR = 0.1011. The title complex consists of 2D 2 ∞ [Co(phen)(μ-L)3/3] layers and crystal water molecules. Each Co atom is octahedrally coordinated by three N atoms and three O atoms to form 2D 2 ∞ [Co(phen)(μ-L)3/3] polymeric layers. Furthermore, such 2D layers are stacked into 3D supramolecular frameworks via Van der Waals’ intermolecular forces, strong and weak hydrogen-bond interactions. The coordination phen and crystal water molecules are resided into cavities of the frameworks.

Synthesis and Luminescence Properties of Three High-dimensional Coordination Polymers:Zn(Ⅱ) with Imidazole or Benzimidazole Ligand

A novel 2D coordination polymer [Zn2（bim）4]n（1）（Hbim=benzimidazole） based on dihydrated- [N,N＇-bis（2-aminophenl）-oxalamide]（L1·2H2O） with zinc nitrate has been synthesized. Previously we have synthesized complexes [In：Zn3（im）12]n（2）（Him= imidazole） and [Zn（im）2]n（3） successfully. In complex 1, each Zn（Ⅱ） coordinated with four ligands adopts a distorted tetrahedron coordination mode, and the 2D grid structure is built by the Zn（bim）4 as the secondary building unit（SBU）. The luminescence properties of the three complexes were investigated for the first time. The emissions with maxima for complexes 1, 2 and 3 are at 379, 469 and 392 nm, respectively.

Two-dimensional correlation spectroscopic studies on coordination between carbonyl group of butanone and metal ions

Two dimensional asynchronous spectra were used to characterize coordination between carbonyl group of butanone and metal ions by using an approach proposed in our recent paper.Spectral variation of n-π^＊transition band of carbonyl group is used to probe the coordination even if metal ions does not possess any characteristic peak in spectra.Experimental results indicate that Ca^2＋ and Al^3＋ show considerable ability to coordinate with the carbonyl group of butanone and bring about spectral variation of the n-π-＊transition band,which is manifested by cross peaks in 2D asynchronous spectra.