Synthesis, Crystal Structure and Luminescent Property of [Zn(C12H9O3)2(C10H8N2)]n·nH2O

Under hydrothermal condition, the reaction of 2-naphthoxyacetic acid with ZnCl2 and 4,4'-bipyridine (4,4'-bipy)has afforded a new Zn(Ⅱ) compound,[Zn(C12H9O3)2(C10H8N2)]n·nH2O1, which was structurally characterized by single-crystal X-ray diffraction analysis. The crystal is of monoclinic, space group P21/c with a = 7.7335(2), b = 19.3834(4), c = 20.1707(4) (A), β =104.9830(10)°, V = 2920.82(11) A3, C34H28ZnN2O7, Mr = 641.95, Z = 4, Dc = 1.460 g/cm3, μ = 0.895 mm-1, F(000) = 1328, R = 0.0406 and wR = 0.0876 for 4417 observed reflections (Ⅰ>2σ(Ⅰ)). Complex 1 consists of one-dimensional zigzag chains deriving from Zn(C12H9O3)2 units linked by 4,4'-bipy ligands, and lattice water molecules decorate between the chains. Non-covalent interactions, such as hydrogen-bonding and aromatic π-π interactions, lead to the formation of a 3D network structure. The thermogravimetric analysis (TGA) and luminescent property for 1 have also been studied in this paper.     

DNA-binding Studies of Two Silver(I)-sulfonate Complexes Constructed by In Situ Reaction

Two silver(I)-sulfonate complexes,[Ag(NO_3)(4,4'-bipy)][Ag(HL)(4,4'-bipy)]·2H_2O(1) and[Ag(H_2O)(4,4'-bipy)][AgL(4,4'-bipy)]·2H_2O(2),have been synthesized by in situ reaction(H_2L = 2-formylbenzenesulfonic acid,4,4-bipy = 4,4-bipyridine).1 displays two parallel 1D chains expending to a 3D supramolecule by n—n interactions and O-H…O hydrogen bonds,in which the[Ag(NO_3)]or[Ag(HL)]units are joined by bridging 4,4'-bipy molecules,respectively.The interactions between the complexes and DNA were studied by means of fluorescence spectra and surface-enhanced Raman scattering(SERS) spectra.The special configuration and intercalation effects between 1 and DNA are stronger than that between 2 and DNA.     

Syntheses and Crystal Structures of Two New Metal Phosphonates:[Mn(H_2O)_2(C_(12)H_8N_2)(HO_3PCH_2CH_2CO_2)] and [Co(H_2O)_4(C_(10)H_8N_2)]·(HO_3PCH_2CH_2CO_2)

By the reactions of manganese(II) acetate, 2-sulfoethylphosphonic acid, 1,10-phen (1,10-phen = 1, 10-phenanthroline) or cobalt(II) acetate, 4,4'-bipy and 2-carboxyethylphosphonic acid, two novel compounds of [Mn(H2O)2(C12H8N2)(HO3PCH2CH2CO2)] (1) and[Co(H2O)4 (C10H8N2)]· (HO3PCH2CH2CO2) (2) have been synthesized and characterized by IR spectroscopy, elemental analyses and single-crystal X-ray diffraction. Compound 1 has a 0D structure. Two Mn(II) ions are linked by two 2-carboxyethylphosphonic acid ligands, forming a centrosymmetric dimer. These dimers are further interlinked into a 2D layer structure by π-π stacking interactions and hydrogen bonds. Compound 2 has a 1D chain structure. The 2-carbo- xyethylphosphonic acid remains uncoor- dinated and acts as the organic template. By the bridge of 4,4'-bipy, the [Co(4,4'-bipy)]2+ chains are formed.     

Synthesis and Crystal Structure of [Cd（NBA）（μ3-OH）（4,4＇-bipy）1/2]n

A new cadmium polymer [Cd(NBA)(μ3-OH)(4,4'-bipy)1/2]n 1 (NBA=m-nitrobenzoic acid and 4,4'-bipy=4,4-bipyridine) has been synthesized by hydrothermal reaction. Its structure was determined by single-crystal X-ray diffraction method, and characterized by elemental analysis and IR spectrum. The crystal is of monoclinic, space group C2/c, with a=15.6912(9), b=25.9394(15), c=6.7332(4)(A), β=114.7700(10)°, V=2488.4(3)(A)3, C12H9CdN2O5, Mr=373.61, Z=8, Dc=1.995 g/cm3,μ=1.776 mm-1, F(000)=1464, R=0.0411 and wR=0.1128 for 2130 observed reflections (I ＞ 2σ(I)).X-ray diffraction studies reveal that the compound features a layered structure, in which 4,4'-bipy ligands bridge Z type of double chains [Cd(μ3-OH)]n and NBA ligands locate at the two sides of the layer. The π-π interactions between the benzene rings of NBA ligands of two adjacent layers lead to the 3D framework.     

Synthesis,Crystal Structure and Water-induced Reversible Crystal-to-amorphous Transformation Property of [{Ni(IBG)(4,4'-bipy)(H_2O)_2}·3H_2O]_n

A novel NiII complex [{Ni(IBG)(4,4'-bipy)(H2O)2}·3H2O]n 1 (H2IBG = isophthaloylbisglycine and 4,4'-bipy = 4,4'-bipyridine) has been synthesized and characterized by singlecrystal X-ray diffraction, elemental analysis, IR spectra and thermogravimetric analysis. It crystallizes in monoclinic, space group P2/c with a = 15.5420(7), b = 22.4344(1), c = 8.3455(5), β = 101.538(3)o, V = 2670.1(7)3, Z = 4, C22H32N4NiO13, Mr = 619.23, Dc = 1.443 g/cm3, F(000) = 1296.0, μ(MoKα) = 0.750 mm-1, the final R = 0.0570 and wR = 0.1445 for 2296 observed reflections with I 2σ(I). In the structure, the NiII metal center is coordinated in an octahedral environment arranged by two water molecules, two carboxylate oxygen atoms and two nitrogen atoms from two 4,4'-bipy ligands. Thermal decomposition and powder X-ray diffraction results indicate that the transformation from the crystal form, [{Ni(IBG)(4,4'-bipy)(H2O)2}·3H2O]n, to the amorphous powder, Ni(IBG)(4,4'-bipy)(H2O)2, is reversible, so the latter form may be utilized as an absorbing agent for water and water vapor.     

Synthesis and Crystal Structure of [Cd(NBA)(μ3-OH)(4,4''-bipy)1/2]n

A new cadmium polymer [Cd(NBA)(μ3-OH)(4,4'-bipy)1/2]n 1 (NBA=m-nitrobenzoic acid and 4,4'-bipy=4,4-bipyridine) has been synthesized by hydrothermal reaction. Its structure was determined by single-crystal X-ray diffraction method, and characterized by elemental analysis and IR spectrum. The crystal is of monoclinic, space group C2/c, with a=15.6912(9), b=25.9394(15), c=6.7332(4)(A), β=114.7700(10)°, V=2488.4(3)(A)3, C12H9CdN2O5, Mr=373.61, Z=8, Dc=1.995 g/cm3,μ=1.776 mm-1, F(000)=1464, R=0.0411 and wR=0.1128 for 2130 observed reflections (I ＞ 2σ(I)).X-ray diffraction studies reveal that the compound features a layered structure, in which 4,4'-bipy ligands bridge Z type of double chains [Cd(μ3-OH)]n and NBA ligands locate at the two sides of the layer. The π-π interactions between the benzene rings of NBA ligands of two adjacent layers lead to the 3D framework.     

Hydrothermal Synthesis,Crystal Structure and Characterization of a New Keggin Polyoxometalate {[Ag~I(4,4’-bipy)]_3[PW_(12)O_(40)]}·(4,4’-bipy)

A novel polyoxometalate {[AgI(4,4'-bipy)]3[PW12O40]}·(4,4'-bipy)·4H2O 1 has been synthesized hydrothermally and characterized by elemental analysis, IR and single-crystal X-ray diffraction. The crystal of 1 belongs to the triclinic system, space group P1 with a = 11.3710(17), b = 12.0701(16), c = 13.1061(12) , α = 112.838(3), β = 94.545(6), γ = 99.526(4)°, V = 1614.4(4) 3, Mr = 3825.40, Z = 1, Dc = 3.935, μ = 22.289mm-1, F(000) = 1692, the final R = 0.0507 and wR = 0.1054. X-ray diffraction analysis reveals that the molecular structure of 1 consists of three coordinated cations [AgI(4,4'-bipy)]+, a polyanion unit [PW12O40]3-, and a discrete 4,4′-bipy molecule. Significantly, there exist two crystallographically independent silver(I) centers in 1 and all [AgI(4,4'-bipy)]+ cations are linked with each other to form a one-dimensional Ag-4,4'-bipy polymer chain. The neighboring polymer chains are further interconnected to form a 3D framework by the covalent effect of silver atoms and terminal oxygen atoms of the polyanion. The electrochemical behaviors of 1 have also been studied in detail by cyclic voltammograms.     

一维链状化合物[Ag(L)]·H2O的合成、晶体结构和荧光性质

The title compound,[Ag(L)]·H2O,1,where HL=4-(isonicotinamido)benzoic acid,was synthesized in methanol solution and its crystal structure was determined by X-ray diffraction analysis.The crystal is of monoclinic.space group P21/c with a=0.571 8(8)nm,b=1.357 2(18)nm,c=1.5580(2)nm,β=91.090(2)°,V=1.2090(3)nm3,Z=4,Dc=2.009 g·cm-3,F(000)=722,Rint=0.042 9,R=0.027 1,wR=0.055 6.In complex 1,the Ag atoms are linearly coordinated by one O atom and one N atom of two ligand molecules.Each I- ligand in turn uses its one carboxylate group and one pyridinyl groups to connect two metal centers,then the one-dimensional (1D) chains is formed.On the other hand,the 1D chains are further connected by O1W-H1WB…O2 hydrogen bonds and Ag-O weak interactions to give a two-dimensional (2D) layer,finally,the 2D net extents to three-dimensional (3D) supramolecular framework by O1W-H1WB…O1 as well as N2-H2…O2 interactions.CCDC:762259.     

Synthesis, Crystal Structure and Photoluminescent Property of a Novel Silver(Ⅰ) Compound {[Ag(bpp)]2(Hphth)(NO3)·(H2O)2}n

Self-assembly of Ag(Ⅰ) nitrate, 1,3-bis(4-pyridyl)propane (bpp) and phthalic acid monopotassium salt (KHphth) in CH3OH-H2O solution produced the title complex,{[Ag(bpp)]2(Hphth)(NO3)·(H2O)2}n, which was characterized by single-crystal X-ray diffraction,elemental analysis, IR spectrum, and photoluminescent spectrum. Single-crystal X-ray analysis revealed that the complex crystallizes in a monoclinic system, space group P21/c, with α =15.4174(5), b = 8.6398(2), c = 25.2466(8) (A), β = 91.072(1)°, V = 3362.34(17) (A)3, Z = 4,C34H37N5O9Ag2, Mr = 875.43, Dc = 1.729 g/cm3, μ = 1.228 mm-1, F(000) = 1768, the final R =0.0749 and wR = 0.1580 for 5754 reflections with I ＞ 2σ(I). The Ag atom is coordinated by two N atoms from two bpp molecules in an approximately linear geometry. The Ag(Ⅰ) ions are linked by the bpp molecules to form one-dimensional zigzag chains propagating along the c axis. The Hphth-and nitrate counter-ions are bridged by solvent water molecules through hydrogen bonds to generate a one-dimensional chain extending along the b axis. Electrostatic interactions between cations and anions, extensive hydrogen bonds and π-π interactions are responsible for the three-dimensional supramolecular structure. In the solid state, the compound exhibits blue photoluminescence with the maximum at 436 nm upon excitation at 344 nm.     

Synthesis, Crystal Structure and Photoluminescent Property of a Novel Silver(I) Compound {[Ag(bpp)]_2(Hphth)(NO_3)·(H_2O)_2}_n

Self-assembly of Ag(I) nitrate, 1,3-bis(4-pyridyl)propane (bpp) and phthalic acid monopotassium salt (KHphth) in CH3OH-H2O solution produced the title complex, {[Ag(bpp)]2(Hphth)(NO3)·(H2O)2}n, which was characterized by single-crystal X-ray diffraction, elemental analysis, IR spectrum, and photoluminescent spectrum. Single-crystal X-ray analysis revealed that the complex crystallizes in a monoclinic system, space group P21/c, with a = 15.4174(5), b = 8.6398(2), c = 25.2466(8) , β = 91.072(1)o, V = 3362.34(17) 3, Z = 4, C34H37N5O9Ag2, Mr = 875.43, Dc = 1.729 g/cm3, μ = 1.228 mm-1, F(000) = 1768, the final R = 0.0749 and wR = 0.1580 for 5754 reflections with I > 2σ(I). The Ag atom is coordinated by two N atoms from two bpp molecules in an approximately linear geometry. The Ag(I) ions are linked by the bpp molecules to form one-dimensional zigzag chains propagating along the c axis. The Hphth- and nitrate counter-ions are bridged by solvent water molecules through hydrogen bonds to generate a one-dimensional chain extending along the b axis. Electrostatic interactions between cations and anions, extensive hydrogen bonds and π-π interactions are responsible for the three-dimensional supramolecular structure. In the solid state, the compound exhibits blue photoluminescence with the maximum at 436 nm upon excitation at 344 nm.     

Synthesis, Crystal Structure and DNA-binding Property of Bismuth(Ⅲ) Complex with p-Hydroxy-phenylacetic Acid

A bismuth(Ⅲ) complex 1 (H2-4,4'-bipy)Bi(HPPA)5(H2PPA)·4H2O (H2PPA = p-hydroxy-phenylacetic acid, 4,4'-bipy = 4,4 -bipyridyl) was hydrothermally synthesized from p-hydroxy-phenylacetic acid (H 2 PPA), Bi(NO 3) 3 ·6H 2 O and 4,4 -bipyridyl, and characterized by elemental analysis, IR, molar conductivity and TG. The single-crystal X-ray diffraction studies demonstrated that the complex is of monoclinic system, space group P21 with a = 10.928(7), b = 22.558(7), c = 11.313(7), β = 91.864(4)°, V = 2787.7(4)3 , Z = 2, C58H61BiN2O22 , Mr = 1347.07, F(000) = 1364, Dc = 1.605 g/cm-3 , μ(MoKα) = 3.247 mm-1 , the final R = 0.0269 and wR = 0.0540 for 9776 observed reflections with Ⅰ > 2σ(Ⅰ). The bismuth(Ⅲ) is seven-coordinated with O atoms, forming a monocapped octahedral geometry. Complex 1 further forms a 3D supramolecular architecture by hydrogen bonds and π-π stacking interactions. Moreover, the interaction between the complex and DNA was studied by EtBr fluoescent probe.     

A Novel （3,4）-Connected Self-penetrating Net, [Cd_3（OABDC）_2（bipy）_2（H_2O）_2]_n

A new luminescent Cd(Ⅱ) compound, [Cd3(OABDC)2(bipy)2(H2O)2]n (1, H3OABDC = 5-oxyacetateisophthalic acid, bipy = 4,4'-bipyridine), has been prepared by the assembly of Cd(Ⅱ) salt with the mixed ligands of H3OABDC and 4,4'-bipy under hydrothermal conditions. The crystal structure is of monoclinic, space group P2/n with a = 13.6730(5), b = 10.1265(3), c = 15.9752(4) , β = 103.061(3)o, V = 2154.70(11) 3, C40H34Cd3N4O18, Mr = 1195.94, Z = 2, Dc = 1.843 g/cm3, F(000) = 1180, μ = 1.549 mm-1, the final R = 0.0409 and wR = 0.1291 for 2746 observed reflections (I > 2σ(I)). Single-crystal X-ray structural analysis reveals that compound 1 features a self-penetrating two-dimensional (2D) layered structure. According to topology analysis, this 2D framework can be characterized as a (3,4)-connected (6.72)2 (62.8)2 (73.8.102) net that has never been reported before. Finally, these 2D layers are further linked by intermolecular hydrogen bonds and π…π interactions to form a three-dimensional (3D) supramolecular framework. Moreover, Compound 1 exhibits strong blue photoluminescence at room temperature.     

{(n-Bu4N)2[Mo2O2S6Cu6Br4(4,4'-bipy)3]·0.5H2O}n的合成与晶体结构

Cluster coordination polymer {(n-Bu4N)2[Mo2O2S6Cu6Br4(4,4'-bipy)3]·0.5H2O)}n (4,4'-bipy=4,4'-bipyridine),has been synthesized and characterized by X-ray crystallography. The polymeric anion {[Mo2O2S6Cu6Br4(4,4'-bipy)3]2-}n is composed of secondary building units (SBUs) [MoOS3Cu3], Br atoms and 4,4'-bipy ligands. Two secondary building units [MoOS3Cu3] and a double parallel 4,4'-bipy ligands form an octanuclear rectangular metallamacrocycle with the dimension of 1.13×0.39 nm2, which is further connected by single bridging 4,4'-bipy ligands to form a 1D zigzag structure. Crystal data for compound 1: C62H97N8O2.50S6Br4Cu6Mo2,M=2 079.68, Triclinic, P1, a=0.982 40 (10) nm, b=1.293 70(10) nm, c=1.737 4(2) nm, α=97.810(10)°,β=101.390(10)°,γ=108.520(10)°, V=2.005 1(4) nm3, Z=2, Dc=1.722 g·cm-3, F(000)= 1039,μ (Mo Kα)=4.055 mm-1, the final R=0.040 7, wR2=0.097 2. CCDC: 236407.     

Syntheses and Structures of Two New Cobalt Supramolecular Complexes, [Co(4,4'-bipy)_2(H_2O)_4]· [Co_2(4,4'-bipy)3O(H_2O)_8]·2TST·2(4,4'-bipy)·4H_2 and [Co(4,4'-bipy)_2(H_2O)_4]DSNT'4,4'-bipy

Two new cobalt(Ⅱ) supramolecular complexes [Co(4,4'-bipy)_2(H_2O) _4]·[Co_2(4,4'-bipy)3-(H_2O) _8]·2TST-2(4,4'-bipy)·4H_2O 1 and [Co(4,4'-bipy) _2(H_2O) _4]DSNT·4,4'-bipy 2 based upon the assembly of Co(Ⅱ), 4,4'-bipyridine (4,4'-bipy) and two new multifunctional organic ligands, 2,4,6-tris(4-sulfophenyl-amino)-1,3,5-triazine (H_3TST) and 2,4-bis(p-sulfanilato)-6-diethylamino-1,3,5-triazine (H_2DSNT), have been prepared by hydrothermal method and characterized by elemental analysis, IR spectrum, and single-crystal X-ray diffraction. The crystal structure of 1 is of monoclinic, space group P2_(1/n) with α= 13.599(4), b = 18.988(6), c = 22.995(7) A, β = 90.273(6)°, V= 5938(3) A~3, Z = 4, C_(56)H_(59)CO_(1.5)N_(13)O_(17)S_3, M_r = 1370.74, D_c = 1.533 g/cm~3,μ = 0.613 mm~(-1), F(000) = 2842, GOOF = 1.018, the final R = 0.0796 and wR = 0.1498 for 9019 observed reflections with I > 2o(I). The crystal structure of 2 belongs to the monoclinic system, space group C2/c with α = 18.864(6), b = 14.283(5), c = 20.246(7) A, β = 107.799(6)°, V = 5194(3) A~3, Z = 4, C_(49)H_(52)CoN_(12)O_(10)S_2, M_r = 1092.08, D_c = 1.397 g/cm~3, μ= 0.480 mm~(-1), F(000) = 2276, GOOF = 1.059, the final R = 0.0665 and wR = 0.1900 for 4887 observed reflections with I> 2σ(I). The results of X-ray crystal structure analysis revealed that complexes 1 and 2 exhibit layered supramolecular frameworks stabilized by electrostatic interactions, π-π interactions and hydrogen bonds.     

Synthesis,Characterization and Crystal Structure of an Inorganic-organic Composite Metatungstate:[Co(4,4′-bipy)_2(H_2O)_4](4,4′-H_2bipy)_2[H_2W_(12)O_(40)]·5.5H_2O

A novel hybrid compound [Co(4,4'-bipy)2(H2O)4](4,4'-H2bipy)2[H2W12O40]·5.5H2O has been synthesized from an acidified aqueous solution and characterized by elemental and thermal analyses,IR and UV spectroscopy,and single-crystal X-ray structure determination. Structure analysis indicates that the title compound is of monoclinic,space group C2/c,with a=21.315(9),b=15.303 (7),c=24.139(10),β=105.170(5)o,V=7599(6)3,Mr=3706.99,Z=4,F(000)=6616,Dc=3.231,μ=18.395 mm-1,R=0.0652 and wR=0.1594. X-ray crystallographic study shows that the title compound consists of one [Co(4,4'-bipy)2(H2O)4]2+ cation,two diprotonated 4,4'-bipyridine molecules,5.5 water molecules of crystallization,and one metatungstate polyoxoanion [H2W12O40]6-,which approaches an effective Td point symmetry. TG-DTA analysis indicates that the framework of the metatungstate polyoxoanion is collapsed at 587.0 ℃.     

Synthesis and Crystal Structure of [Cd(NBA)(μ_3-OH)(4,4′-bipy)_(1/2)]_n

A new cadmium polymer [Cd(NBA)(μ3-OH)(4,4′-bipy)1/2]n 1 (NBA = m-nitrobenzoic acid and 4,4′-bipy = 4,4-bipyridine) has been synthesized by hydrothermal reaction. Its structure was determined by single-crystal X-ray diffraction method, and characterized by elemental analysis and IR spectrum. The crystal is of monoclinic, space group C2/c, with a = 15.6912(9), b = 25.9394(15), c = 6.7332(4) ′, β = 114.7700(10)°, V = 2488.4(3) 3, C12H9CdN2O5, Mr = 373.61, Z = 8, Dc = 1.995 g/cm3, μ = 1.776 mm-1, F(000) = 1464, R = 0.0411 and wR = 0.1128 for 2130 observed reflections (I > 2σ(I)). X-ray diffraction studies reveal that the compound features a layered structure, in which 4,4′-bipy ligands bridge Z type of double chains [Cd(μ3-OH)]n and NBA ligands locate at the two sides of the layer. The π-π interactions between the benzene rings of NBA ligands of two adjacent layers lead to the 3D framework.     

Syntheses and Crystal Structures of Two 1D Chain Coordination Polymers Based on 2-Benzoylbenzoic Acid

Two new coordination polymers,[Co(BYBA)2(4,4'-bpy)(H2O)2]·H2O (1) and [Zn(BYBA)2(4,4'-bpy)] (2) (4,4'-bpy=4,4'-bipyridine,BYBAH= 2-benzoylbenzoic acid),have been synthesized by hydrothermal conditions and characterized by single-crystal X-ray diffraction,elemental analyses,IR spectra and fluorescence spectrum.Crystal data for 1:C38H32CoN2O9,Mr= 719.59,monoclinic,space group P2/c,a=22.981(2),b=11.4438(11),c=12.9327(12),β=94.642(1)°,V=3390.0(5)3,Z=4,Dc=1.410 g/cm3,F(000)=1492,R=0.0488 and wR=0.1201;and those for 2:C38H26ZnN2O6,Mr=672.00,triclinic,space group P1,a=8.7032(10),b=11.4882(13),c=16.872(2),α=107.146(1),β=99.055(1),γ=90.851(2)°,V=1588.5(3)3,Z= 2,Dc=1.405 g/cm3,F(000)=692,R=0.0409 and wR=0.0894.Complex 1 exhibits 1D polymeric chains which are linked into a 2D sheet by π···π interactions.Complex 2 is composed by 1D zigzag chains connected through C-H···π stacking interactions to generate a 2D layer.     

Structure and Fluorescence Property of a 2D Bilayer Cd(Ⅱ) Coordination Polymer Induced by H-bonding and π-π Interaction

Solvothermal reactions of 4,4'-oxybis(benzoic acid) (H2oba) with 1,3-dipyridyl benzene (1,3-dpb) produced a two-dimensional (2D) cadmium(Ⅱ) coordination polymer {[Cd(oba)(dpb)]·H2O}n (1). The complex 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 = 13.6692(9), b = 25.9647(17), c = 8.7912(6) , α = 125.0370(10), γ = 2544.7(3)°, V = 2544.7(3) 3, C30H22N2O6Cd, Mr = 618.91, Dc =1.609 g/cm3, F(000) = 1248, μ = 0.904 mm-1 and Z = 4. The neighboring Cd(Ⅱ) ions are linked by oba2-anions and 1,3-dpb to form an infinitely 2D wavelike sheet, and two such 2D sheets are interlocked with each other by H-bonding to form a 2D → 2D structure. The adjacent two groups of interlocked structures are further linked to form a bilayer 2D supramolecular network by π-π interactions. In addition, the fluorescence property of 1 was also studied.     

Synthesis and Crystal Structure of a Ca~Ⅱ Coordination Polymer of H_2Adefovir (H_2Adefovir={[2-(6-Amino-9H-purin-9-yl)ethoxy]methyl}phosphonic Acid)

A Ca II coordination polymer of H 2 Adefovir (H 2 Adefovir={[2-(6-amino-9H-purin-9-yl)ethoxy]methyl}phosphonic acid),[Ca(H 2 O)(Adefovir)] n (1),has been synthesized via the reaction of Ca(OH) 2 and H 2 Adefovir under hydrothermal conditions.Complex 1 crystallizes in the monoclinic system,space group P2 1 /c with a=22.344(5),b=6.8505(14),c=8.0101(17),β=90.356(4)o,V=1226.0(4)3,M r=329.28,D c=1.784 g/cm 3,μ=0.672 mm-1,F(000)=680,Z=4,the final R=0.0296 and wR=0.0916 for 2295 observed reflections with I > 2σ(I).In the structure,the Ca II center is coordinated to the phosphate group of Adefovir anion,forming a 2D coordination layer,and such layers are linked into a 3D framework by hydrogen-bonding interactions between the adenine groups of Adefovir anion.     

A New 1D Cd(Ⅱ) Coordination Polymer Constructed by 2,2'-H_2biimidazole:[Cd(H_2biim)_2(SO_4)]_n·3nH_2O

A new 1D Cd(II) coordination polymer, [Cd(H2biim)2(SO4)]n·3n H2O(1, H2 biim = 2,2'-H2biimidazole), has been hydrothermally synthesized and characterized by single-crystal X-ray diffraction. It crystallizes in monoclinic, space group P21/c with a = 6.8405(14), b = 17.792(4), c = 14.987(3) A, β = 92.68(3), V = 1822.1(6) A3, Z = 4, C12H18 Cd N8O7S, Mr = 530.80, Dc = 1.935 g/cm3, F(000) = 1064, μ(Mo Ka) = 1.371 mm-1, R = 0.0280 and w R = 0.0617. In 1, adjacent Cd(II) atoms are bridged by sulfate anions in bidentate modes to yield a 1D chain. H2 biim ligands are located on both sides of the chain in chelating bidentate modes. Further, the H2 biim ligands from neighboring chains are paired through π-π interactions to generate a supramolecular layer, which is stabilized by the complicated N–H···O and O–H···O hydrogen bonds. In addition, thermal behavior and luminescent property of 1 have been investigated.