A new complex has been synthesized by the reaction of CuBr and 1,4-bis(2-allyl-2H-tetrazol-5-yl)benzene.The crystal structure of the resulting complex,[Cu3(1,4-bis(2-allyl-2H-tetrazol-5-yl)benzene)Br3]n(1),has been determined by single-crystal X-ray diffraction analysis.Complex 1 is of monoclinic system,space group P21/c with a=10.983(7),b=6.294(4),c=17.606(10)A,β=102.465(6)°,V=1188.4(3)A3 and Mr=577.52.Structural analyses revealed complex 1 shows a three-dimensional(3D)framework.The thermal stability and luminescent properties of the complex are also investigated.
Two metal-organic coordination complexes, [Zn(2,6-ndc)(1,2-bix)]_n(1) and [Zn(2,6-ndc)(1,3-bix)]n(2)(2,6-H_2ndc = 2,6-naphthalenedicarboxylic acid, 1,2-bix = 1,2-bis(imidazole-1-ylmethyl)-benzene and 1,3-bix = 1,3-bis(imidazole-1-ylmethyl)-benzene) have been synthesized by the hydrothermal method. Though the two complexes both crystallize in a triclinic system, space group P1 and show similar two-dimensional structures, weak intermolecular interactions(π-π packing interactions) only exist in complex 2. They are characterized by single-crystal X-ray diffraction analysis, fluorescence measurement, IR spectroscopy and TGA. Moreover, the solid-state fluorescence spectra of two complexes show maximal emission peaks at 365(λ_(ex) = 329 nm) and 367 nm(λex = 344 nm), respectively.
Under hydrothermal conditions,2-(pyridin-4-yl)-1H-imidazole-4,5-dicarboxylaic acid(H_3PIDC)reacted with Gd(NO_3)_3 to give a 3D complex{[Gd(HPIDC)·(μ_4-C_2O_4)_(0.5)·H_2O]·2H_2O}_n(1).Single-crystal X-ray determination shows that complex 1 crystallizes in the monoclinic system,space group P2_1/c with a=8.287(8),b=14.796(14),c=11.559(11)A,β=90.969(15)°,Z=4,V=1417(2)A^3,C_(11)H_(11)GdN_3O_9,D_c=2.280 g/cm^3,M_r=486.48,λ(MoKa)=0.71073 A,μ=4.738 mm^(-1),F(000)=936,R=0.0248 and wR=0.0522.Dielectric constant of complex 1 was measured at different frequencies with temperature variation.
A new Gd coordination polymer based on 2-(pyridin-4-yl)-1H-imidazole-4,5-dicarboxylate(H_3PIDC) has been synthesized under hydrothermal conditions,formulated as {[Gd_3(HPIDC)_3(PIDC)(H_2O)_4]·3H_2O}_n(1).The compound crystallizes in the monoclinic system,space group C2/c with a=20.951(7),b=9.515(3),c=27.483(10) A,β=106.176(6)°,Z=4.V=5262(3) A^3,C_(40)H_(45)Gd_3N_(12)O_(30).D_c= 2.071 g/cm^3,M_r=645.63,λ(MoKa)=0.71073A,μ=3.846mm^(-1),F(000)=3204,the final R=0.0390 and wR=0.1332.Complex 1 is a two-dimensional MOF built up from T-shaped 3-connected HPIDC^(2-),PIDC^(3-) and 4-connected metal nodes.Dielectric constant of complex 1 was measured at different frequencies with temperature variation.
利用复合共沉积法,在涂有中间层SnO2-Sb2O5的Ti基体上制备了PbO2+nano-WO3复合电极材料.采用X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)和双电层电容法等对复合电极表面的组成、结构、形貌及有效电化学面积进行测试.结果表明,随着纳米WO3掺杂量逐渐增大,复合电极的表面粗糙度和孔隙率逐渐变大,电化学有效面积也随之增大;利用线性扫描及Tafel曲线等电化学测试方法研究了nano-WO3的掺杂对复合电极析氧活性的影响,结果表明,掺杂nano-WO3的复合电极较纯PbO2电极的析氧活性大幅提高,其起始析氧电位发生负移,析氧过电位下降,最大可降低近300 m V.
Two novel metal-organic coordination compounds with molecular structures of {[Co(TMBC)4Cl2]·2H2O}(1) and {[Ni(TMBC)4Cl2]·2H2O}(2)(TMBC = 4'-((1H-1,2,4-triazol-1-yl)methyl)-[1,1'-biphenyl]-2-carbonitrile), have been synthesized under hydrothermal conditions of Co Cl2·6H2O and Ni Cl2·6H2O with 4'-((1H-1,2,4-triazol-1-yl)methyl)-[1,1'-biphenyl]-2-carbonitrile, respectively. Both compounds crystallize in triclinic systems, space group P 1. They are characterized by single-crystal X-ray diffraction analysis, elemental analysis, IR spectroscopy and TGA. Moreover, their electrochemical behaviors have also been studied in different electrolyte solutions, respectively.
A new series °f 11-pyridyl substituted dibenz°-diazepin-1-°ne derivatives 1 was synthesized by a tw° step cycl°c°ndensati°n reacti°n. All the c°mp°unds were characterized by IR,MS, and 1H NMR. And crystals °f 1a and 1b were °btained and determined by X-ray single-crystal diffracti°n. Crystal data °f 1a: C48H52N6O7, m°n°clinic system, space gr°up C2/c, a = 28.39(4), b =9.275(12), c = 16.84(2) A, β = 104.98(3)°, V = 4284(10) A3, Z = 4, F(000) = 1752, Dc = 1.279 g/cm3,R = 0.0603, and wR = 0.1314. Crystal data °f 1b: C24H21N3 O, m°n°clinic system, space gr°up P21/c,a = 11.625(5), b = 19.055(9), c = 8.741(4) A, β = 95.547(6)°, V = 1927.2(15) A3, Z = 4, F(000) =776, Dc = 1.266 g/cm3, R = 0.0494, and wR = 0.1287.
Two novel coordination polymers with molecular structures(2MI)^+[Zn(2MI)Cl_3]^-(1) and(2MI)^+NO_3^-(2) based on ligand 2-methylimidazole(2MI) were synthesized under solution method. Compound 1 crystallizes in the monoclinic system, space group Cc with a=7.489(2), b=13.448(4), c=13.983(4) ?, β=98.402(2)°, Z=4 and V=102.246(2) ?~3. Compound 2 crystallizes in the orthorhombic system, space group pnma with a=14.296(3), b=6.3180(12), c=7.3862(13) ?, β=90°, Z=4 and V=667.1(2) ?~3. Dielectric measurements show compounds 1 and 2 have reversible dielectric anomalous behaviors with variation frequencies at different temperature.
