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用双-(2-羟乙基)二硫代甲酸铵(HEDC)在反相液相色谱中作检测某些金属离子的衍生化试剂,HEDC的金属螯合物微溶于水,可直接水样注射于C18柱中进行检测,范围为0.006~10mg/L相对偏差1%~2%,检测波长254nm,金属汞的整合物在HPLC分析前进行浓缩富集检测限可低至0.06~25μg/L,相对偏差小于2%。  相似文献   

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在桥式双核配合物中,金属中心之间的磁交换作用的研究对阐明金属酶的活性和寻找新功能材料均具有重要意义。前报我们已合成  相似文献   

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合成了两个氰基桥连的异金属配位聚合物[{Mn(dpa)2}2W(CN)8·CH3CN·4H2O]n(1)和[Mn2(H2O)4{W(CN)8}·3H2O]n(2),并对它们进行了结构和磁性表征.X-射线单晶结构分析表明,在化合物1中,W2(CN)4Mn2四核片段通过公共的[W(CN)8]^4-离子相互连接,形成一个无限延伸的一维链状结构.化合物2的结构较为复杂,是一个含有一维孔道(约13.21A×11.82A)的三维网状结构.磁性研究表明,在两种化合物中,相邻的两个锰离子之间抗磁性的八氰基配离子均传递非常微弱的反铁磁相互作用.  相似文献   

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在pH 9.80的硼砂-氢氧化钠缓冲溶液、十六烷基三甲基溴化铵(CTMAB)存在下,铜(Ⅱ)、镉(Ⅱ)、镍(Ⅱ)和锌(Ⅱ)与二甲酚橙(XO)发生灵敏的显色反应,所形成的络合物吸收光谱严重重叠,各组分间相互干扰。采用人工神经网络结合分光光度法,设计不经分离同时测定铜(Ⅱ)、镉(Ⅱ)、镍(Ⅱ)和锌(Ⅱ)含量的方法。结果表明...  相似文献   

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TheoreticalStudiesontheStructuresandReactivityofStannylenoides(Ⅱ)QiuHua-yu*,DengCong-hao(TheoreticalChemistryGroup,ShandongUn...  相似文献   

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用正相薄层色谱法研究了乙醛酸缩氨基硫脲和锌(Ⅱ)、铅(Ⅱ)、铜(Ⅱ)、锰(Ⅱ)、镍(Ⅱ)、钴(Ⅱ)配合物的色谱行为,各组分配合物的比移植Rf相差较大,得到了满意的分离。讨论了该系列配合物正相吸附薄层色谱比移植与紫外光谱R带λ(max)变化关系的一致性。  相似文献   

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李怀娜  尤进茂  李峰  田君濂  刘翠 《色谱》1995,13(3):203-204
 用正相薄层色谱法研究了乙醛酸缩氨基硫脲和锌(Ⅱ)、铅(Ⅱ)、铜(Ⅱ)、锰(Ⅱ)、镍(Ⅱ)、钴(Ⅱ)配合物的色谱行为,各组分配合物的比移植Rf相差较大,得到了满意的分离。讨论了该系列配合物正相吸附薄层色谱比移植与紫外光谱R带λ(max)变化关系的一致性。  相似文献   

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吴建人  林云雁 《分析化学》1998,26(7):861-864
卡尔曼滤波(KF)用于解析互相干扰离子的Co(Ⅱ),Ni(Ⅱ),Zn(Ⅱ)的伏安重叠峰。用该法地钢铁试样中的这些离子进行了测试,效果良好,设计了BASIC程序,将有关数据输入后,直接给出结果,为保证结果准确度,程序中设置了两个监控出口。  相似文献   

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Two 3d-4f heterometallic one-dimensional chains with neutral 4,4'-bipyridine ligands as linkers and[Cu2Ln2] clusters (Ln = Gd for 1, Dy for 2) as nodes have been hydrothermally synthesized and structurally characterized. Magnetic studies indicate that complex 1 exhibits a relatively large magnetocaloric effect, with an entropy change -△Smax m= 24.8 J kg 1 K^-1, whilst, complex 2 features slow magnetic relaxation at low temperature.  相似文献   

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Homobinuclear complex (HCuL)2 (1) (H3L: N-3-carboxylsalicylidene-N'-salicylaldehyde-1,2-diaminoethane) was obtained from self-organization of the reported complex HCuL, and its crystal structure was determined through X-ray diffraction at room temperature. The crystal of complex 1 belongs to monolinic system, the space group Cc, a=2.5326(5) nm, b=0.88861(18) nm, c=1.3738(3) nm, β=96.95(3)°, Z=4, R1=0.0520, wR2=0.1185. (HCuL)2 is a dimeric molecule and has extended phenolic oxygen-bridged structure. In addition, using mononuclear complex HCuL as building blocks, Cu(Ⅱ)-Mg(Ⅱ)-Cu(Ⅱ) heterotrinuclear complex 2 was synthesized, and its crystal structure also has been determined by X-ray analysis. The crystal of complex 2 is of monoclinic system, space group Pc, a=1.1816(2) nm, b=1.5599(3) nm, c=1.9642 (4) nm, β=98.22°, Z=2, R1=0.0701, wR2=0.1498. Each dissymmetricai cell unit of complex 2 contains two heterotrinucler neutral molecules: {[CuL(H2O)]Mg[CuL(CH3OH)]} and {[CuL]Mg[CuL(H2O)]}.  相似文献   

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用二甲酚橙作柱前衍生试剂,在C18色谱柱上,以乙腈-水(12:88,V/V)作流动相,六次甲基四胺为对离子试剂,反相离子对高效液相色谱-光度法快速分离测定痕量Ni^2+,Zn^2+,Cu^2+配合物和试剂在8min内出峰完毕,575nm处检测,检出限分别为(ng/mL):Ni^2+0.83,Zn^2+0.01,Cu^2+,1.30,用于植物样品中Ni^2+,Zn^2+,Cu^2+的测定,结果令人满  相似文献   

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The title complex, [Mn(DPPZ)(PZDC)(H2O)] 1 (DPPZ = dipyrido[3,2 -a:2',3'- c]phenazine and H2PZDC = pyrazine-2,3-dicarboxylic acid), has been hydrothermally synthesized and structurally characterized by X-ray single-crystal diffraction, elemental analyses, IR, TG- DTA and magnetic susceptibility measurement. It crystallizes in triclinic, space group P1^- with a = 6.6842(5), b = 7.5741(6), c = 20.5755(15)A, α = 90.1160(10), β = 97.0560(10), γ = 97.3350(10)°, V= 1025.16(13)A^3, Z = 2, MnC24H14N6O5, Mr= 521.35, Dc= 1.689 g/cm^3, F(000) = 530, μ(MoKa) = 0.699 mm^-1, R = 0.0366 and wR = 0.0810. Compound 1 contains one- dimensional chains which are further stacked through π-π interactions to form a 3D supramolecular architecture. The water molecule O(1W) is involved in hydrogen bonding interactions with symmetric carboxylate oxygen atom 0(4) at (x+ 1, y+1, z) and symmetric PZDC nitrogen atom N(6) at (1-x, 1-y, 1-z), which completes the structure of 1. Magnetic susceptibility measurement indicates that the compound behaves a weak antiferromagnetic exchange interaction.  相似文献   

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<正> A new series of hexatungstate compounds has been prepared recently in this laboratory. The starting material is white powdery tungstic acid,and its extraction solution by DMSO reacts with many transition metal carbonates to give the hexatungstates of the respective metallic ions coordinated by DMSO. Among them,the structures of hex-akis(dimethylsulfoxide)-manganese (Ⅱ) hexatungstate [{(CH3)2SO}6Mn] [W6O19](1) and hexakis(dimethyl sulfoxide)-copper(Ⅱ) hexatungstate [{(CH3)2SO}6Cu}][W6O19] (2) have been determined from three-dimensional x-ray diffraction data and are hereby reported.Both compounds (1) and (2) crystallize in the monoclinic space group C2/c. The u-nit cell parameters for compound (1) are α=16. 398(3),b= 15. 026(1) ,c= 17. 827(2) A,β=111. 84(2)°,Z=4;and those for compound (2) are α=19. 165(4) ,b=14. 131 (2),c=16. 626(4) A ,β=117. 40(2)°, Z= 4. Both structures were solved by direct methods. Full matrix least squares refinements of positional and anisotropic temperature factors based o  相似文献   

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郎建平  蔡进华 《结构化学》1995,14(4):297-299
StructureofCopper(Ⅱ)Bis(piperidyldithiocarbamate)LangJian-ping;LuJian-Mei;BianGuo-Qing(DepartmentofChemistry,SuzhouUniversity...  相似文献   

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使用改进的RD—1型热导式自动量热计测定了Ni(Ⅱ)、Co(Ⅱ)、Zn(Ⅱ)-N-(间位取代苯基)亚氨基二乙酸三个二元体系的表观生成热.当将其与它们的配体的质子化热相关联时,发现在两者之间存在着良好的直线焓关系.这些金属离子配合物的生成热也符合Irving—Williams序列,即有Co(Ⅱ)<Ni(Ⅱ)>Zn(Ⅱ)的顺序.配体上取代基不同,其生成热的大小有Cl->CH3O->H->CH3-的顺序.从两级生成热来比较,有一级大于二级的普遍规律.本文详细地讨论了这些规律.  相似文献   

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