Construction of a 2D Cd（II） Coordination Polymer Based on a V-shaped Bidentate Ligand

A two-dimensional（2D）coordination polymer{[Cd（bdc）（dpb）]·H2O}n（1）has been prepared by solvothermal reaction of 1,3-dipyridyl benzene（1,3-dpb）with deprotonated1,4-benzenedicarboxylate（H2bdc）,and was characterized by elemental analysis,IR spectroscopy,and X-ray single-crystal diffraction.It crystallizes in the monoclinic system,space group C2/c with a=15.1839（12）,b=20.7585（17）,c=7.2989（6）,β=117.3450（10）°,V=2043.5（3）3,C24H18N2O5Cd,Mr=526.81,Dc=1.712 g/cm3,F（000）=1056.0,μ=1.110 mm-1and Z=4.The neighboring Cd（II）ions link the bdc2-anions and 1,3-dpb to form an infinite 2D sheet,and such two2D sheets are interlocked with each other to form a 2D→2D sheet.Two groups of interlocked sheets are further linked together by intermolecularπ···πinteraction,giving a 3D supramolecular network.In addition,the fluorescence property of 1 was also studied.     

Synthesis,Crystal Structure and Characterization of a New Coordination Polymer from the Self-assembly of CoCl_2 Salt and Flexible Ligand 1,3-Bis（4-pyridyl）propane

A new 1D coordination polymer [Co(bpp)3Cl2(H2O)2]n 1 (bpp = 1,3-bis(4-pyridyl)-propane) was synthesized and characterized by elemental analysis,IR spectrum and single-crystal X-ray diffraction. The crystal belongs to the orthorhombic system,space group Ibca with a = 16.569(9),b = 17.240(10),c = 27.087(16) ,V = 7738(8) 3,Z = 8,Dc = 1.306 g/cm3,Mr = 760.65,λ(MoKa) = 0.71073 ,μ = 0.623 mm1,F(000) = 3192,the final R = 0.0678 and wR = 0.2011. The Co(II) atom is coordinated in a slightly distorted octahedral CoN4Cl2 geometry by two Cl atoms in the axial positions,four N atoms from the two bridging bpp ligands and two pendant bpp ligands. The CoN4Cl2 octahedra are connected by the bridging bpp ligands to form a 1D neutral coordination polymer chain. The chains are linked by face-to-face π-π interactions between adjacent pendant bpp ligands to give rise to a 3D supramolecular architecture. The photoluminescent investigation indicates that the emission of 1 is attributed to ligand-centered emission. The variable-temperature magnetic susceptibility measurement shows weak antiferromagnetic behavior in the complex.     

Synthesis, Characterization and Crystal Structure Determination of a Thiocyanato Bridged One-dimensional Polymeric Complex of Cadmium(Ⅱ)

A new one-dimensional polymeric complex [Cd(SCN)2(H2O)]L (L = N,N?-bis(furan- 2-ylmethylene)hydrazine) has been synthesized and characterized by IR, UV spectra, TG-DTA technique and single-crystal X-ray diffraction analysis. It crystallizes in triclinic, pace group P1 with a = 5.9268(8), b = 10.8678(15), c = 13.3671(19) , α = 109.295(2), β = 95.092(2), γ = 97.8580(10)°, V = 796.70(19) 3, Z = 2, C12H10CdN4O3S2, Mr = 434.76, μ = 1.648 mm–1, Dc = 1.812 g/cm3, F(000) = 428, R = 0.0308 and wR = 0.0769. The crystal structure reveals that the structure of [Cd(SCN)2(H2O)]n features di-μ-1,3-thiocyante bridges and 1D chains. The octahedrally coordinated Cd atom is surrounded by one oxygen atom from water molecule, three S atoms and two Natoms from five di-μ-1,3 thiocyanato bridges. The Cd atoms are connected by two di-μ-1,3 thiocyanato bridges with the Cd(1)…Cd(1A) separation of 4.239(1)  and Cd(1)…Cd(1B) of 5.852(1). In addition, the one-dimensional straight chain structure is further connected by multiform intermolecular N-H…O hydrogen bonds and π…π interactions to form a three-dimensional supramolecular structure.     

Hydrothermal Synthesis and Crystal Structure of a Novel Binuclear Cd(Ⅱ) Coordination Polymer Based on 1,2-Benzenedicarboxylate and Imidazole

The hydrothermal reaction of Cd(OAc)2·H2O with 1,2-benzenedicarboxylate(1,2-BDC),imidazole and H2O resulted in the formation of a binuclear polymeric Cd(Ⅱ) complex {[Cd2(1,2-BDC)2(Im)4]·(H2O)}n which was then characterized by elemental analyses and single-crystal X-ray diffraction analysis.The crystal is of monoclinic system,space group P21/c with a = 14.6455(3),b = 9.3530(2),c = 23.7838(5) ,β = 106.6290(10)°,C112H104Cd8N32O36,Mr = 3373.47,V = 3121.64(11) 3,Dc = 1.795 g/cm3,F(000) = 1672,μ = 1.428 cm-1 and Z = 1.The final R = 0.0316 and wR = 0.0687 for 5045 reflections with I > 2σ(I).In the title complex,the two Cd(Ⅱ) ions are in different coordination environments with distorted octahedral and pengonal bipyramidal geometries,respectively.Two Cd polyhedra are linked together through one μ2-η1:η1 and one μ2-η1:η2 carboxylate groups from different 1,2-BDC ligands,giving rise to a binuclear Cd(Ⅱ) cluster,and such clusters are connected by bridged 1,2-BDC ligands to form a 2-D structure along the c axis.The inter-and intermolecular hydrogen bonds further connect the 2-D structures into a 3-D supramolecular network.     

Crystal Structure and Magnetic Property of a Two-dimensional Manganese Compound [Mn(PhCOO)_2(4,4'-bipyridine)]_n

A new two-dimensional polymeric manganese compound [Mn(PhCOO)2(4,4'-bi-pyridine)]n 1 has been prepared and structurally characterized by X-ray diffraction. The complex crystallizes in space group Pbcn with a = 18.7158(2), b = 11.6919(3), c = 9.4799(2) , V = 2074.42(7) 3, Z = 4, Mr = 453.34, Dc = 1.452 g/cm3, μ = 0.670 mm-1 and F(000) = 932. The final refinement gave R = 0.0458 and wR = 0.1439 for 1358 observed reflections with I > 2σ(I). The complex consists of repeating units of Mn(PhCOO)2(4,4'-bipyridine). Each Mn center is six-coordinated by four carboxylate O atoms of four benzoate anions and two pyridyl N atoms from bipy ligands to furnish a slightly distorted octahedral geometry. The two adjacent Mn atoms are connected by a pair of μ1,3-carboxylate groups to form infinite chains, which are further interlinked by bipy to complete a 2D grid network. The magnetic property of the polymeric complex has also been investigated.     

Synthesis, Crystal Structure and Magnetic Properties of a Novel Azide-bridged Copper（Ⅱ） Coordination Polymers Containing Nitroxy Nitroxide

A novel azide-bridged copper(Ⅱ) coordination polymer, [Cu3(NITpPy)4(N3)6]n (NITpPy = 4-pyridyl-4,4,5,5-tetramethylimidazline-3-oxide-1-oxyl), was structurally and magnetically characterized. It crystallizes in the triclinic space group P with a = 7.6932(10), b = 14.5556(19), c = 16.122(2) , α = 108.443(2), β = 95.251(2), γ = 104.236(2)°, V = 1631.7(4) 3, C48H64Cu3N30O8, Mr = 1379.87, Z = 1, Dc = 1.404 g/cm3, μ(MoKα) = 1.041 mm-1, F(000) = 713, the R = 0.0510 and wR = 0.1185 for 4285 observed reflections with I > 2σ(I). X-ray analysis reveals that the Cu(Ⅱ) ions are linked by nitrogen atom of μ1,1 azido ligands to form a Cu-Cu-Cu unit. The units are linked by μ1,3 azido ligands through a bridging style to form a one-dimensional coordination polymer. The variable-temperature magnetic susceptibility data of the complex show ferromagnetic interactions in the complex.     

Syntheses and Crystal Structures of Complexes [Cu(C14H8N3O4Br)](C4H9NO) and [Ni(C14H9N2O3Br)](C4H9NO)

The title compounds, Cu(L1)(C4H8NHO) and Ni(L2)(C4H8NHO) (H2L1 = 5-bro- mosalicylaldehyde-p-nitrobenzoylhydrazone, H2L2 = 5-bromosalicylaldehyde-p-hydroxybenzo- ylhydrazone), have been obtained and characterized by single-crystal X-ray diffraction. Complex 1 belongs to the triclinic system, space group P1 with a = 8.6960(2), b = 9.957(2), c = 11.878(2) , α = 73.36(3), β = 78.25(3), γ = 82.64(3)o, V = 962.1(3) 3, Mr = 512.81, Z = 2, F(000) = 514, Dc = 1.770 g/cm3, μ(MoKα) = 3.251, R = 0.0337 and wR = 0.0846. Complex 2 is of monoclinic, space group P21/c with a = 13.313(2), b = 8.2096(1), c = 21.890(3) , β = 125.737(3)o, V = 1941.9(4) 3, Mr = 478.97, Z = 4, F(000) = 968, Dc = 1.638 g/cm3, μ(MoKα) = 3.085, R = 0.0356 and wR = 0.0817. The ligands form a satisfactory N2O2 square plane around the metal centers in two compounds. Different patterns of hydrogen bonds are observed owing to the presence of different substituents on aromatic ring of the acylhydrazone Schiff bases. In complex 1, square-planar copper(II) complexes are linked by intermolecular hydrogen bonds leading to zigzag infinite chains. In complex 2, the metal complexes are linked via hydrogen bonds to form corrugated sheets in a staggered fashion; 3D channels along the b axis are constructed through other non-covalent interactions between the neighboring layers.     

Synthesis and Crystal Structure of a 1D Coordination Polymer: {[Cu(HSSA)(py) 3]·H2O}n (H3SSA=5-Sulfosalicylic Acid, py=Pyridine)

The title compound [Cu(HSSA)(py)3H2O]n (H3SSA = 5-sulfosalicylic acid,py = pyridine) Ⅰ has been synthesized and structurally determined by single-crystal X-ray diffraction. Ⅰ was further characterized by elemental analyses,thermogravimetric analyses,IR and UV-visible spectroscopy. The crystal belongs to the monoclinic system,space group P21/c with a = 9.4564(10),b = 18.2679(19),c = 15.7284(12) ,β = 126.045(4)o,V = 2196.9(4) 3,Z = 4,Dc = 1.618 g/cm3,Mr = 535.02,μ = 1.141 mm-1,F(000) = 1100,λ(MoKα) = 0.71073 ,the final R = 0.0429 and wR = 0.1044 for all observed reflections. In the structure,every two Cu(Ⅱ) atoms are bridged by a bivalent 5-sulfosalicylic anion to form a 1D chain-like coordination polymer. Lattice waters between chains link them to form 2D layers which are further linked by C-H···O hydrogen bonds to form a three-dimensional supramolecular network.     

Construction of a 2D Cd(Ⅱ) Network with Homohelical Chains Based on 1,3-Dipyridyl Benzene(Dpb) and 4,4'-Sulfonyldibenzoic Acid(H_2sdb)

A two-dimensional(2D) coordination polymer {[Cd2(sdb)2(dpb)2]·3H2O}n(1) was prepared by solvothermal reaction of two types of V-shaped ligands: 1,3-dipyridyl benzene(dpb) and deprotonated 4,4'-sulfonyldibenzoic acid(H2sdb). It was characterized by elemental analysis, IR spectroscopy, and X-ray single-crystal diffraction. Complex 1 crystallizes in the monoclinic system, space group Fdd2 with a = 46.247(10), b = 9.994(2), c = 24.267(6) , V = 11216(4) 3, C60H46Cd2N4O15S2, Mr = 1387.97, Dc = 1.559 g/cm3, F(000) = 5296.0, μ = 0.902 mm-1 and Z = 8. Each [Cd(COO)]2 cluster links four sdb2- anions to form infinitely ABAB stacked 2D wave-like sheets, in which each sheet contains the same helical chains, and the helical directions of sheets A and B are reversed. Dpb links the rest coordinated sites of [(COO)Cd]2 cluster to form a 2D network. In addition, the solid fluorescence of 1 and dpb is also studied.     

Structure and Properties of a New Rare-earth Borate LiSrY_2（BO_3）_3

The structure of LiSrY2(BO3)3 has been solved by single-crystal X-ray diffraction analysis at 298 and 113 K on different diffractometers.It crystallizes in trigonal with space group P-3m1(No.164).The cell parameters at room temperature are as follows:a = 10.3345(9),c = 6.4049(11) ,V = 592.41(13) 3,Z = 3,Mr = 448.81,F(000) = 618,μ = 21.327 mm-1 and Dc = 3.774 g/cm3.The crystal structure consists of gear-like [BY6O33] groups which are linked together by corner-sharing to form a two-dimensional layer parallel to the ab plane.These layers are connected one after another by sharing oxygen atoms with B(2) atoms along the c direction to construct a three-dimensional framework.Li and Sr atoms just occupy the cavities formed by oxygen atoms.In addition,the vibrational spectroscopy of LiSrY2(BO3)3 and photoluminescence properties of the Eu3+ doped LiSrY2(BO3)3 were also studied.     

Cadmium（Ⅱ） Nitrite Complex Based on the Bis（2-benzimidazole） and Aromatic Carboxylate Ligands

A new cadmium(Ⅱ) nitrite complex Cd2(H2C3PIm)2(BDC)(NO2)2(1,H2C3PIm = 2,2'-(1,3-propanediyl)bis(1H-benzimidazole),H2BDC = 1,4-benzenedicarboxylic acid) has been synthesized by solvothermal reaction in formamide,and its structure(C42H36Cd2N10O8,Mr = 1033.61) was determined by single-crystal X-ray diffraction analysis.The crystal belongs to the monoclinic system,space group P21/n with a = 0.9859(5),b = 0.8936(5),c = 2.3188(5) nm,β = 97.576(5)°,V = 2.025(16) nm3,Z = 2,Dc = 1.695 g/cm3,μ(MoKα) = 1.118 mm-1,F(000) = 1036,S = 1.017,the final R = 0.0304 and wR = 0.0752 for 3761 reflections with I > 2σ(I).The centrosymmetric complex 1 contains a dimer in which two distorted octahedral Cd(II) centers are bridged by BDC ligand and chelated by H2C3PIm.The units of the complex are linked via weak N-H···O hydrogen bonds between the nitrito and the BDC ligands,leading to the formation of a 1D zigzag chain along the b axis.The π-π packing interactions contribute to the formation of a three-dimensional supramolecular architecture.The complex exhibits strong photoluminescence at room temperature.     

A New Cadmium(Ⅱ) Dimer Constructed by 1,10-Phenanthroline Derivative and Chlorine Anions: Syntheses,Crystal Structure and Photoluminescence

In this work, a new Cd(II) dimeric compound, [Cd(Cl)2(L)(H2O)]2(1, L = 2-(4-fluorophenyl)-1H-imidazo[4,5-f][1,10]phenanthroline), has been achieved under hydrothermal conditions. The structure of compound 1 was determined by single-crystal X-ray diffraction. Compound 1 crystallizes in monoclinic, space group P21/c with a = 8.944(2), b = 18.781(5), c = 10.904(3), β = 91.392(4)°, V = 1831.2(8) 3, Z = 2, C38H26Cd2F2Cl4Cl4N8O2, Mr = 1031.27, Dc = 1.870 g/cm3, F(000) = 1016, μ(Mo Ka) = 1.513 mm-1, R = 0.0532 and w R = 0.1407. Each Cd(II) atom is in an octahedral coordination sphere, completed by two nitrogen atoms from one L ligand, two chlorine anions, and one water oxygen atom. Two chlorine anions bridge two Cd(II) atoms to give a dimer [Cd(Cl)2(L)(H2O)]2. Adjacent dimers are stacked by one type of π-π interactions among L ligands to generate a 1D supramolecular chain. Further, the 1D supramolecular chains are stacked by another type of π-π interactions among L ligands to give a 2D supramolecular layer. Finally, the luminescent property of 1 has been studied in solid state at room temperature.     

Synthesis and Crystal Structure of a New Mn（Ⅱ） Coordination Polymer Based on Asymmetric Semi-rigid V-shaped Dicarboxylate

A novel manganese(Ⅱ) coordination polymer with 2-(4-carboxyphenoxy) benzoic acid (2,4'-H2oba) and 1,10-phenanthroline (1,10-phen) has been prepared by hydrothermal synthesis and characterized by single-crystal X-ray diffraction, IR and elemental analysis. Compound [Mn(2,4'-oba)(1,10-phen)] is of monoclinic system, space group P21/n with a = 7.960(1), b = 15.464(2), c = 18.703(3) , β = 99.976(2)°, V = 2267.5(6) 3, Z = 4, Mr = 491.35, Dc = 1.439 g/cm3, F(000) = 1004 and μ = 0.623 cm·1. The final R = 0.0419 and wR = 0.0978 for 3444 observed reflections with I > 2σ(I). X-ray diffraction analysis reveals that the oba2-ligands adopt a bis(chelating bidentate) mode to link two Mn(Ⅱ) centers to form an infinite 1D helical chain. Furthermore, a 3D supramolecular structure was formed by π-π stacking interactions and hydrogen bonds.     

Synthesis, Structure and Properties of a Strontium（Ⅱ） Complex with 2, 3-Pyrazinedicarboxylic Acid

Complex [Sr2(pdc)2(H2O)7]·H2O(1, H2 pdc=2,3-pyrazinedicarboxylic acid) has been synthesized and characterized by single-crystal X-ray diffraction studies and FT-IR. Structural determination reveals that there are two crystallographically independent strontium ions in 1. The coordination geometry of Sr(1) is a nine-coordinated distorted monocapped tetragonal antiprism, while Sr(2) is a nine-coordinated distorted monocapped tetragonal prism. The ligand pdc 2- takes two different connecting modes and links Sr(Ⅱ) centers to generate a 2D layer structure. The 2D layers are linked through O-H···O and O-H···N hydrogen bonds to form a 3D framework structure. Thermal stability and luminescent properties of complex 1 are investigated. 1 belongs to the monoclinic system, space group P21/n with a=10.7182(10), b=7.0377(6), c=29.225(3) , β=95.7170(10)o, Z=4, V=2193.5(3) 3 , M r=651.56, D c=1.973 g/cm 3 , F(000)=1296, μ=4.951 mm -1 , the final R=0.0318 and wR=0.0726 for 3938 observed reflections with I > 2σ(I).     

A New Cadmium（Ⅱ） Coordination Polymer Incorporating a 3D Framework with 1D Channels Bridged by Flexible Cyclohexane-1,2,4,5-tetracarboxylate Ligand

The hydrothermal reaction of Cd(OAc)2·2H2O, 4,4'-bpy and cyclohexane-1,2,4,5-tetracarboxylic acid (H4L) yields a three-dimensional (3D) coordination porous framework [Cd2LI(4,4'-bpy)1.5(H2O)2]n·2nH2O, which was characterized by single-crystal X-ray diffraction (MoKα radiation, λ = 0.71073), elemental analysis and IR. This complex crystallizes in the monoclinic system, space group C2/c with a = 25.951(3), b = 11.6618(12), c = 20.046(2) , β = 114.863(2)o, V = 5504.4(10) 3, Z = 8, Dc = 1.900 g/cm3, Mr = 787.30, μ = 1.615 mm-1, F(000) = 3128, the final R = 0.0978 and wR = 0.1780. The structure of the complex is a 3D coordination Cd-carboxylate framework consisting of 1D hexagonal channels along the c-axis filled with the bridging 4,4'-bpy ligands. The 4,4'-bpy ligands with two kinds of conformations are located alternately in the channels through coordination and hydrogen interactions to support the whole porous framework, in which the conformation-flexible cyclohexane-1,2,4,5-tetracarboxylate ligand adopts the I (e,a,a,e) conformation and acts as a pentadentate ligand to connect five Cd(Ⅱ) atoms via the carboxylate groups in different coordination modes.     

Synthesis,Crystal Structure and Photoluminescence of a New Zn(Ⅱ) Dimer Constructed by 1,10-Phenanthroline Derivative and Flexible Dicarboxylate

A new compound,[Zn(L)(1,4-chdc)]2·2H2O(1,1,4-chdc = 1,4-cyclohexanedicarboxylate and L = 11-fluoro-dipyrido[3,2-a:2,3-c]phenazine),has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction.The crystal of 1 belongs to triclinic,space group P1 with a = 9.4679(19),b = 10.915(2),c = 12.577(3) ,α = 77.22(3),β = 74.73(3),γ = 65.47(3)°,C52H39F2N8O10Zn2,Mr = 1104.65,V = 1131.4(4) 3,Z = 1,Dc = 1.621 g/cm3,S = 1.091,μ(MoKα) = 1.143 mm–1,F(000) = 565,R = 0.0426 and wR = 0.1171.In 1,two 1,4-chdc anions bridge two Zn(Ⅱ) atoms to form a dimer.The neighboring dimers are further extended by π-π stacking interactions to form a 2D supramolecular layer.The luminescent property of the compound has also been investigated.     

A New Cadmium(Ⅱ) Coordination Polymer Extended through Hydrogen Bonds and π-π Stacking Interactions: Synthesis and Photoluminescence Property

A new coordination polymer, {[Cd(OPY)_2(tdc)(H_2O)]·H2 O}n(OPY = 4,4?-(oxybis(4,1-phenylene))dipyridine, H2 tdc = thiophene-2,5-dicarboxylic acid), has been synthesized hydrothermally based on a V-shaped ligand OPY. The structure was fully characterized by elemental analysis, FT-IR spectroscopy, and X-ray single-crystal diffraction analysis. In1, two OPY ligands and one water molecule acted as terminal ligands coordinating to Cd~(2+) cation to form [Cd(OPY)_2 H_2O]~(2+) units, which are then linked by tdc2-ligands to generate a one-dimensional chain. Every two adjacent chains linked by extensive O–H···O hydrogen bonds constitute one-dimensional double-chains, and such chains are extended into two-dimensional layers via O–H···N hydrogen bonds. These layers are further connected to form a three-dimensional supramolecular architecture via π-π stacking interactions. In addition, the thermal stability and solid state fluorescence property of 1 were also investigated.     

Hydrothermal Syntheses,Crystal Structures and Luminescence Properties of Zn(Ⅱ) and Cu(Ⅱ) Complexes Based on 2,2'-((Sulfonylbis(4,1-phenylene))bis(oxy))diacetic Acid

The 2,2'-((sulfonylbis(4,1-phenylene))bis(oxy))diacetic acid(H2L) and 4,4'-bipyridine(4,4'-bipy) are employed as organic ligands to react with metal salts to obtain two new metal-organic frameworks(MOFs), namely [M2L2(4,4'-bipy)](M = Zn(1), Cu(2)). They have been successfully synthesized under hydrothermal conditions. Single-crystal X-ray diffraction reveals that two complexes are isostructural and crystallize in orthorhombic system with space group Pbcn. All L^2- ligands bridge metal ions to form an infinite 1D Z-shaped chain along the a axis. Then through 4,4'-bipy, contiguous Z-shaped chains are linked to form a 2D layer structure. The luminescent studies of the H2L ligand and complex 1 in the solid state and thermogravimetric analyses(TGA) of two complexes are investigated.     

A New 2D Zinc(Ⅱ) Coordination Polymer Constructed by Imidazole-4,5-dicarboxylic Acid(H_3IDC) and 1,4-Bis(imidazol-1-ylmethyl)-benzene(bix)

A new 2D Zn(Ⅱ) coordination polymer [Zn(HIDC)(bix)0.5]n(1) was obtained by the hydrothermal reaction of ZnCl2,imidazole-4,5-dicarboxylic acid(H3IDC) and 1,4-bis(imidazol-1-ylmethyl)-benzene(bix) with a 2:2:1 mole ratio.X-ray diffraction crystal structural analysis reveals it crystallizes in monoclinic,space group P21/n with a = 12.125(3),b = 10.541(3),c = 12.484(3) ,β = 115.834(4)°,V = 1436.0(6) 3,Mr = 338.60,Z = 4,Dc = 1.566 Mg·m-3,F(000) = 684,μ(MoKα) = 1.730 mm-1,the final R = 0.0439 and wR = 0.0888 for 2101 observed reflections with I ≥ 2σ(I).In 1,each zinc(Ⅱ) ion is five-coordinated with a slightly distorted trigonal bipy-ramidal coordination geometry,and each μ2-HIDC2-acts as a bridge to bond two neighboring Zn(Ⅱ) ions,leading to a 1D zigzag chain architecture.The adjacent zigzag chains are further linked by μ2-bix to form an infinite 2D network structure.The fluorescence spectrum of 1 exhibits intense emission at 466 nm when excited at 397 nm in solid state at room temperature.     

Hydrothermal Synthesis, Crystal Structure and Magnetic Property of a Novel Pentanuclear Copper(II) Complex:[Cu_5(SIP)_2(HSIP)_2(H_2O)_(18)](H_2O)_5

The pentanuclear complex, Cu5(SIP)2(HSIP)2(H2O)18(H2O)5(H3SIP = 5-sulfoi-sophthalic acid), has been synthesized by the hydrothermal reaction of CuCl2 with NaH2SIP at 160 ℃, and characterized by single-crystal X-ray diffraction and IR spectrum.The crystal of the complex crystallizes in a triclinic system, space group P1-, with a = 7.0018(5), b = 11.9725(8), c = 19.0424(13) , α = 78.8540(10), β = 85.1710(10), γ = 83.6080(10)o, V = 1553.24(19) 3, Z = 1, C32H60O51S4Cu5, Mr = 1706.74, Dc = 1.825 g/cm3, μ = 1.937 mm-1, F(000) = 869, the final R = 0.0709 and wR = 0.1503 for 4235 observed reflections with I > 2σ(I).The five Cu2+ ions are connected by two symmetry-related tridentate SIP3-ligands and charge-balanced by two monodentate HSIP2-ligands, giving a discrete pentanuclear structure.The pentanuclear copper molecules are linked by hydrogen bonds to form a three-dimensional supramolecular structure.The temperature-dependent magnetic susceptibility data revealed weak ferromagnetic magnetic interactions between the Cu2+ ions.