首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 171 毫秒
1.
采用液相色谱流动相为0.05mol·L~(-1)草酸和0.095mol·L~(-1)氢氧化锂,流速为1.0ml·min~(-1);柱后衍生试剂为0.001mol·L~(-1)PAR+0.3mol·L~(-1)氨水+0.1mol·L~(-1)乙酸,流速为1.0ml·min~(-1),进样体积为20μl,检测波长为500nm,同时对Pb~(2+)、Cu~(2+)、Cd~(2+)、Co~(2+)、Zn~(2+)和Ni~(2+)检测。方法可用于水样检测。  相似文献   

2.
本文通过溶剂热法合成了三个基于4'-羧基-2,2':6',2"-三联吡啶(HL)的单核配合物,其分子式为[ML2]·4H2O(1,M=Zn(Ⅱ);2,M=Cu(Ⅱ);3,M=Fe(Ⅱ)),并分别对其进行了元素分析、波谱、单晶和粉末衍射表征。晶体结构测试结果表明3个配合物为异质同晶结构,都属于四方晶系的I42d空间群。配合物1~3都是1个二价金属离子和2个羧基未配位且去质子化的三齿螯合配体L配位形成的单核结构,通过分子间π-π堆积和氢键作用拓展成三维超分子网络结构。由于二价Zn离子的全充满d10配位构型,配合物1与其配体相比具有明显的室温固态蓝色荧光发射性质。  相似文献   

3.
通过水热或溶剂热合成的方法制备了3个Cd(Ⅱ)/Co(Ⅱ)/Zn(Ⅱ)配位聚合物[Cd(hbmb)0.5(pta)]n1),[Co(hbmb)(1,4-bdc)]n2)和{[Zn2(hbmb)1.5(bptc)(H2O)]·0.5hbmb·3H2O}n3)(hbmb=1,1''-(1,6-己烷)双-(2-甲基苯并咪唑),H2pta=邻羧基苯乙酸,1,4-H2bdc=1,4-苯二乙酸,H4bptc=3,3'',4,4''-二苯甲酮四羧酸))。单晶结构解析表明配合物1是一个4-连接的二维平面网络,拓扑符号为(44·62)。配合物2是一个4-连接的二维褶皱网络,拓扑符号为(42·6)(42·63·8)。配合物3是一个(3,4,4)-连接的三重穿插网络,拓扑符号为(42·62·82)(4·62)(4·64·8)。其中配合物1属于单斜晶系,空间群为P21/ca=0.758 32(15) nm,b=1.452 8(3) nm,c=1.911 3(5) nm,β=112.26(3)°,Z=4;配合物2属于单斜晶系,空间群为P21/na=1.090 8(2) nm,b=1.873 1(4) nm,c=1.301 9(3) nm,β=91.09(3)°,Z=4;配合物3属于三斜晶系,空间群为P1a=1.119 6(2) nm,b=1.481 2(3) nm,c=1.926 6(4) nm,α=89.72(3)°,β=87.65(3)°,γ=68.28(3)°,Z=2。  相似文献   

4.
本文通过溶剂热法合成了三个基于4’-羧基-2,2’∶6’,2"-三联吡啶(HL)的单核配合物,其分子式为[ML2]·4H2O(1,M=Zn(Ⅱ);2,M=Cu(Ⅱ);3,M=Fe(Ⅱ)),并分别对其进行了元素分析、波谱、单晶和粉末衍射表征。晶体结构测试结果表明3个配合物为异质同晶结构,都属于四方晶系的I42d空间群。配合物1~3都是1个二价金属离子和2个羧基未配位且去质子化的三齿螯合配体L配位形成的单核结构,通过分子间π-π堆积和氢键作用拓展成三维超分子网络结构。由于二价Zn离子的全充满d10电子构型,配合物1与其配体相比具有明显的室温固态蓝色荧光发射性质。  相似文献   

5.
合成了2个异双核金属Salamo型配合物[Cu(L)Nd(NO33(C2H5OH)](1)和[Zn(L)(OAc)Ce(NO32(CH3OH)](2)(H2L=O,O''-(ethane-1,2-diyl)bis(1-(3-ethoxy-2-hydroxyphenyl)-3-ethoxy-2-hydroxybenzaldehyde oxime)),并通过元素分析、红外、紫外、荧光光谱和X射线晶体学对其进行了表征。配合物1是不对称的双核结构,其中Cu(Ⅱ)原子为五配位具有稍微扭曲的四方锥几何构型,而钕(Ⅲ)原子是十配位具有一种扭曲的双帽十二面几何构型。配合物2也是不对称的双核结构,其Zn(Ⅱ)原子为五配位具有一种介于四方锥和三角双锥体之间的几何构型,Ce(Ⅲ)原子为十配位采用了一种扭曲的双面十二面几何构型。与配体相比,在激发波长为318 nm时配合物1发生了荧光淬灭,而配合物2表现出荧光增强。  相似文献   

6.
以取代的二硫代草酰胺根作为桥联配体, 合成了3种新的三核镍配合物[Ni3(Ped)2](ClO4)2(H2O) (1)、[Ni3(Ped)2](NO3)2(H2O) (2)和[Ni3(Ped)2](Ac)2(H2O)2 (3),及2种新的异三核铜镍和铜锰配合物[CuNi2(Ped)2](NO3)2(H2O)2 (4)和[CuMn2(Ped)2](NO3)2(H2O)2 (5) (H2Ped =N,N′-双(2-吡啶乙基)二硫代草酰胺)。通过元素分析、红外光谱、紫外可见光谱、电导、电子顺磁共振谱等对配合物进行了表征,对配合物进行了热分析。测定了配合物(5)的变温磁化率,研究了配合物(5)中Cu(Ⅱ)-Mn(Ⅱ)离子间的磁相互作用,结果表明在Cu(Ⅱ)-Mn(Ⅱ)离子间的磁相互作用具有高自旋基态的非正规自旋态性质。  相似文献   

7.
导电高分子;电化学聚合;聚(聚(N-乙烯基咔唑))膜;荧光光谱;阻抗谱  相似文献   

8.
用溶剂热法合成了2个以5-(4-(2,6-二(2-吡啶基)-4-吡啶基)苯氧基)间苯二甲酸(H2L)为配体的金属-有机配位聚合物:{[NiL(H2O)]·H2O}n(1),[CdL(phen)]n(2)。通过X-射线单晶衍射,元素分析和红外光谱进行了结构表征。结构分析表明,在1中,L2-配体的2个羧基氧原子桥连相邻的2个Ni(Ⅱ)离子,形成平行于a轴的一维链,链间则通过吡啶氮原子与金属离子连接,最终形成具有(4,4)-连接三维网络结构。在2中,Cd(Ⅱ)为七配位的单帽三棱柱几何构型,L2-配体通过2个羧基和1个吡啶基与3个中心金属Cd(Ⅱ)相连,形成(3,3)-连接的二维层面结构,又通过面间的ππ堆积作用形成了3D超分子结构。测定了配位聚合物的热稳定性和2的荧光性质。  相似文献   

9.
采用对苯二甲酸为模板剂, 溶剂热法合成了2个以5-(4-(2, 6-二(2-吡嗪基)-4-吡啶基)苯氧基)间苯二甲酸(H2L)为配体的金属-有机配位聚合物:{[MnL] ·0.5H2O}n (1), {[CaL(H2O)2]·H2O}n (2)。通过X-射线单晶衍射, 元素分析和红外光谱进行了结构表征。结构分析表明, 1具有(3, 3)-连接的不同手性型二维层面结构, 这些交替出现的单手性左旋型和右旋型二维平面通过配体的吡啶环与吡嗪环间ππ堆积作用构成了三维超分子结构;2是通过L2-配体羧基桥连接相邻的Ca(Ⅱ)金属中心, 形成一条平行于b轴方向的一维链结构。研究了配位聚合物的热稳定性和2的荧光性质。  相似文献   

10.
以3-甲氧基水杨醛与乙醇胺缩合得到席夫碱化合物hmmpH2(hmmpH2=2-[(2-羟乙基亚氨基)甲基]-6-甲氧基苯酚),以hmmpH2为配体合成了配合物[Fe2(hmmp)2(hmmpH)2]·1.5CH3CN·0.5H2O(1)和[Co2Na(hmmp)2(N32(CH3O)(CH3OH)2](2)。以3,5-二溴水杨醛与乙醇胺缩合得到化合物hmdbrpH2(hmdbrpH2=2-[(2-羟乙基亚氨基)甲基]-4,6-二溴苯酚),以hmdbrpH2为配体合成了一个混价三核配合物[Mn(Ⅱ)Mn(Ⅲ)2(hmdbrp)2(O2CPh)4(CH3OH)2]·2CH3CN·2CH3OH(3)(HO2CPh为苯甲酸)。对配合物分别进行了元素分析、X射线单晶衍射分析,还对13进行了磁性研究。单晶结构分析表明配合物1中2个六配位的Fe(Ⅲ)离子通过2个醇羟基氧原子相连形成二聚体结构,配合物2中Co(Ⅲ)也为六配位,通过2个甲醇中氧原子相连形成双核结构,配合物3为一混价三核锰结构,3个Mn离子呈线性排列。磁性测试表明配合物1中Fe(Ⅲ)离子之间存在反铁磁相互作用,配合物3的三核锰单元内Mn(Ⅱ)、Mn(Ⅲ)离子之间存在反铁磁相互作用。  相似文献   

11.
在水热条件下合成了一个新颖的夹心结构四核镍有机-无机杂化锗钨酸盐[Ni(dien)(H2O)3]2·[Ni(Hdien)2]{[Ni(dien)]2Ni4(H2O)2(GeW9O34)2}·10H2O(1), 利用X射线单晶衍射确定了其结构, 并通过红外光谱、热重、X射线粉末衍射、X射线能谱和元素分析对其进行了表征. 其晶体属三斜晶系, P1, a=1.1937(3) nm, b=1.4323(3) nm, c=1.6394(4) nm, α=93.424(2)°, β=96.058(3)°, γ=109.758(4)°, V=2.6094(1) nm3,Z=1. X射线单晶衍射结果表明, 化合物1是由夹心构型的多阴离子通过镍-二乙烯三胺配阳离子连接形成的一维线性结构.  相似文献   

12.
在水热条件下合成了一个新颖的配位聚合物[Cd(nip)(bix)0.5H2O]n (1) (nip=5-硝基间苯二甲酸,bix=1,4-(二亚甲基)二咪唑)。单晶X-射线衍射分析表明,晶体属三斜晶系,P1 空间群,晶胞参数a=0.827 1(2) nm,b=1.016 5(3) nm,c=1.147 4(3) nm,α=70.862(4)°,β=68.988(4)°,γ=69.001(4)°。V=0.818 4(4)nm3,Z=2,Dc=1.861g·cm-3,μ=1.380 mm-1,F(000)=454,最终的R1=0.040 0,wR2=0.090 1。配合物1中,nip2-离子以μ3桥联的方式连接Cd(Ⅱ)中心形成含有交替8元环和16元环的一维聚合链,进而,bix配体柱撑一维链形成了(3,4)-连接的二维配位网;最后,通过R22(6)氢键环的作用,二维网拓展为具有(3,5,5)-连接{3.4.5}{3.42.5.64.7.8} {3.43.52.62.72}拓扑结构的三维超分子体系。此外,本文还研究了配合物1的热稳定性和荧光性质。  相似文献   

13.
A novel two-dimensional cadmium(Ⅱ) complex {[Cd(bpds)(bpp)2]·2H2O}n (1) with 4,4′-biphenyldisulfonic acid (H2bpds) and 1,3-bis(4-pyridyl)propane (bpp) has been synthesized by means of hydrothermal method and characterized by elemental analysis, IR spectrum, thermal analysis and single-crystal X-ray diffraction. The crystal is of triclinic, space group P1 with a=0.900 96(12) nm, b=1.098 84(14) nm, c=1.125 71(15) nm, α=115.907(2)°, β= 92.307 (2)°, γ=105.383 (2)°, V=0.950 8(2) nm3, Dc=1.497 g·cm-3, Z=1, F(000)=440, Goof=1.046, R1=0.028 2, wR2= 0.074 9. Complex 1 shows a novel two-dimensional (2D) lamellar structure and further extended into a 3D supramolecular structure through O-H…O and C-H…O hydrogen bonding interactions. Luminescent studies show that complex 1 exhibits intense blue fluorescent emission. CCDC: 769593.  相似文献   

14.
以二氰胺钠[Na(dca)]和异烟酰胺(L)为共配体分别与铜盐和镉盐反应合成了2种新的配合物:一维的[Cu(L)2(dca)2]·2MeOH(1)和二维的[Cd(L)2(dca)2](2)。通过元素分析和红外光谱进行了表征。X射线晶体结构分析表明配合物1属于三斜晶系,P1空间群,a=0.68007(6)nm,b=0.73759(6)nm,c=1.15405(10)nm,α=99.9550(10)°,β=90.3070(10)°,γ=103.2940(10)°,V=0.55428(8)nm3,Z=2。2属于单斜晶系,P21/c空间群,a=1.04377(7)nm,b=0.95630(6)nm,c=1.05593(7)nm,β=119.3330(10)°,V=0.91885(10)nm3,Z=4.1是一个中性的配位链,CuⅡ之间通过双μ1,5-dca桥而连接,L是单齿配位的。这些配位链通过链间的N-H…N氢键作用扩展为二维的层,甲醇分子位于层间,甲醇分子与酰胺基团之间的N-H…O,O-H…O氢键作用进一步将二维的层拓展为三维的网络。在2中,每个镉离子通过μ1,5-dca连接相邻的4个镉离子,从而形成了二维的(4,4)网,层与层之间通过酰胺基团之间的氢键作用扩展为三维的网络。  相似文献   

15.
A novel heteropoly compound, containing two kinds of coordinated cations, [K(H2O)2Ni(H2O)6]2[V10O28], has been synthesized through routine process and characterized by elemental analyses, IR, 51V NMR and single crystal X-ray diffraction. It crystallizes in the triclinic system, space group P1 with a=0.87382(17) nm, b=1.075 4(2) nm, c=1.111 1(2) nm, α=65.10(3)°, β=75.01(3)°, γ=70.63(3)°, V=0.884 8(3) nm3 and Z=1. The X-ray analysis reveals that the two kinds of coordinated cations are linked by three shared coordinated water molecules, and K+ cations coordinate with ten oxygen atoms: five of which come from V10O286- anion, the other five from water molecules. The title compound exhibits extended 2D array building up of V10O286- groups connected by ten-coordinated K+ cations. The hexahydrated nickel cations Ni(H2O)62+ lie in neat apposition to three adjacent V10O286- clusters. CSD: 413271.  相似文献   

16.
The hydrothermal reaction of pyridine-3,4-dicarboxylic acid (pydcH2), 4,4′-bipyridine and GdCl3·6H2O yield a novel gadolinium coordination polymer {[Gd2(pydc)23-OH)2(H2O)2]·H2O}n(1). The compound was chara-cterized by elemental analysis, thermal analysis, IR spectra and single-crystal X-ray structure analysis. The crystal of the Gd(Ⅲ) complex belongs to triclinic system, space group P1 with: a=0.796 25(16) nm, b=0.944 46(19) nm, c=1.262 1(3) nm, α=76.50(3)°, β=84.95(3)°, γ=83.04(3)°, Z=2, V=0.914 4(3) nm3, Dc=2.669 g·cm-1, μ=7.269 mm-1, F(000)=692, and R1=0.033 3, wR2=0.062 3. The crystal structure revealed that compound 1 has a 2D layer structure incorporating 1D Gd-O-Gd double chain, and hydrogen bonding interactions result in the former of 3D supramolecular network structure. CCDC: 669079.  相似文献   

17.
水热合成了1个新配合物[Cd(BDC)(H2C2EIm)(H2O)]n(BDC=对二苯甲酸;H2C2EIm=2,2'-乙基双苯丙咪唑).通过元素分析、红外光谱、热重以及X-射线单晶洐射对其进行了表征.该晶体属三斜晶系,P(1)空间群.Cd(Ⅱ)原子通过BDC和H2C2EIm 2种配体连接成一维Z型带状结构,带与带之间通过N-H…D,O-H…O连接成三维超分子结构.室温下配合物具有较强的荧光发射光谱.  相似文献   

18.
张寿春  邵颖 《无机化学学报》2006,22(9):1733-1739
A novel dinuclear copper(Ⅱ) complex, [Cu2(phen)(dipic)2(H2O)2]·2H2O (phen=1,10-phenanthroline, dipicH2=2,6-pyridinedicarboxylic acid), has been prepared and structurally characterized. The complex crystallizes in the triclinic system, space group P1 with cell parameters a=0.846 0(17) nm, b=1.289 5(3) nm, c=1.452 7(3) nm, α=77.42(3)°, β=79.11(3)°, γ=87.08(3)°, and V=1.518 8(6) nm3. The dinuclear complex shows potential DNA cleavage activity at micromolar concentration in the presence of H2O2 and exhibits higher nuclease efficiency than mononuclear complex [Cu(dipic)(H2dipic)]·H2O. Without external reductants, the added H2O2 may contribute to the generation of hydroxyl radicals that result in DNA strand scission.CCDC:291786.  相似文献   

19.
A 3D infinitely extended structural rare earth coordination compound with a formula of K3{[Sm(H2O)7]2Na[α-SiW11O39Sm(H2O)4]2}·14H2O has been synthesized by reaction of Sm2O3, HClO4, NaOH with α-K8SiW11O39·nH2O, and characterized by IR,UV spectra, ICP, TG-DTA, cyclic voltammetry, variable-temperature magnetic susceptibility and X-ray single-crystal diffraction.X-ray single-crystal diffraction indicates that the title compound crystallizes in a triclinic lattice, Pī space group, with a=1.2462(3) nm, b=1.2652(3) nm,c=1.8420(4) nm,α=87.45(3)°,β=79.91(3)°,γ=82.57(3)°,Z=1, R1=0.0778,wR2=0.1610.Structural analysis reveals that Sm3+(1) coordination cation has incorporated into the vacant site of [α-SiW11O39]8- entity,forming the [α-SiW11O39Sm(H2O)4]5- subunit.The two adjacent [α-SiW11O39Sm(H2O)4]5- subunits are combined with each other through two Sm(1)-O-W bridges accompanying the formation of dimmer structural unit [α-SiW11O39Sm(H2O)4]210- of the title compound.The neighboring dimmer structural units [α-SiW11O39Sm(H2O)4]210- are linked to form the 1D chainlike structure by means of two Sm3+(2) and a Na+(1) coordination cations.The K+(1) cations connect the 1D packing chains constructing the 2D netlike structure, and adjacent netlike layers are also grafted by K+(2) cations to build the novel 3D infinitely extended structure.The result of TG-DTA curves manifests that the decomposition temperature of the title polyanionic framework is 554℃.The cyclic voltammetry measurements show that the title polyanion has the two-step redox processes in aqueous solution with pH=3.1.Variable temperature magnetic susceptibility indicates the title compound obeys the Cruie-Weiss Law in the higher temperature range from 110 to 300 K, while in the lower temperature range from 2 to 110 K the comparatively strong antiferromagnetism interactions can be observed.  相似文献   

20.
A novel coordination polymer [(C10H16N)2(Pb2I6)·2DMF·H2O]n (C10H16N=N-butyl-2-Methy-Pyridinium) was synthesized by the reaction of Pb(NO3)2 with C6H10NI at room temperature in DMF solvent and structurally characterized by means of X-ray single diffraction. The title compound crystallizes in triclinic system, space group P1 with a=1.1237(2) nm, b=1.25330(16) nm, c=0.808 00(12) nm, α=102.523(4)°, β=92.475(5)°, γ=95.712(10)°, V=1.102 9(3) nm3, Z=1, Dc=2.470 Mg·m-3, F(000)=738, chemical formula C26H48N4O3Pb2I6 and Mr=1 640.46, μ(Mo)=11.849 mm-1, the final R=0.057 8 and wR=0.166 5 for 3716 observed reflections with I > 2σ(I). The title compound consists of cations ([(C10H16N)+] and anion chain(PbI3-),they are combined by static attracting forces in the crystal. DMF and H2O locate between the organic and inorganic moiety. CCDC: 210812.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号