期刊文摘

<正> 含金属的环氧-螯合聚合物合成螯合固化剂:由Cu,Zn,Co,Ni,Fe,Mn,Cd等金属盐与多胺以等摩尔比直接复合,在螯合物的熔点温度搅拌2～4小时,产品由元素分析,IR鉴定。环氧-螯合物组份在20～60℃有长的寿命,而加热100～120℃时有足够快的固化速度。因加热使固化剂分解为阴离子、阳离子、多胺配位体等,与环氧树脂反应。固化速度与胶含量、金属离子特性等有关。而影响固化物强度与挠曲温度的最重要因素是金属性质。改变螯合固化剂的结构能获得强度高的环氧聚合物。 J.Macro.Sci.A 29(6)483-498(1992)     

基于3-吡啶-3-苯甲酸构筑的配合物[M(3,3-PBC)_2(H_2O)_2](M=Zn,Ni,Co)的合成、表征和性能研究

在水热条件下,采用3-吡啶-3-苯甲酸(3,3-HPBC)和过渡金属盐合成了3种新型配合物[M(3,3-PBC)2(H2O)2](M=Zn,Ni,Co)。通过元素分析、化学分析、红外光谱、热重分析等方法对配合物组成进行了分析和表征。此外,研究了Zn(3,3-PBC)2(H2O)2配合物的荧光性质。     

金属离子对二(2-乙基己基)磷酸钠微乳体系相行为的影响

对于由二(2-乙基己基)磷酸钠(NaDEHP)、正辛烷和金属盐水溶液组成的微乳体系,研究了金属离子(Na+、Ca2+、Mn2+、Fe3+、Co2+、Ni2+、Cu2+、Zn2+、Al3+)对相行为的影响。随金属盐水溶液浓度增加,体系发生WinsorI→Ⅲ→Ⅱ型转变。含不同金属盐的体系产生中相微乳液的金属盐浓度范围(中相盐宽)是不同的。所研究的金属离子按中相盐宽增加排出的顺序是:Fe3+相似文献   

1,2,3,4-丁烷四羧酸过渡金属配合物的制备和表征

用过渡金属盐与 1,2 ,3,4 -对所制金属配合物的组成和结构进行了表征。利用热重分析对该配合物的热稳定性进行了研究 ,得出其热稳定性次序为 :Cu2 C8H6O8相似文献   

2-羟基-2-二茂铁基丙胺过渡金属配合物的合成与表征

采用2-羟基-2-二茂铁基丙胺与Ni(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)、Cd(Ⅱ)、Hg(Ⅱ)反应合成了5个新的配合物,经元素分析、红外光谱、核磁共振氢谱、差热-热重分析和摩尔电导对配合物的结构进行了表征,确定配合物的组成为M(FcA)Cl2.nH2O(M=Ni,Cu,Zn,Hg,n分别为5,2,1,0;Cd为Cd(FcA)2Cl2.2H2O),FcA为2-羟基-2-二茂铁基丙胺。     

助剂对Ni/SiO2催化剂1,4-丁炔二醇加氢性能的影响

通过分步浸渍法在Ni/SiO 2催化剂中分别引入Zn、Cu、La、Mo、Co金属助剂,结合N 2物理吸附-脱附、XRD、H 2-TPR和NH 3-TPD等表征手段研究金属助剂对1,4-丁炔二醇加氢性能的影响。结果发现,Mo的引入使Ni/SiO 2催化剂的初始活性大幅增加,但反应2 h后活性下降,归因于催化剂表面酸中心使催化剂积炭失活;引入Cu、La及Co后的催化剂活性较低,推测是由于催化剂表面产生强吸附氢物种,不利于1,4-丁炔二醇加氢反应进行;与其他样品相比,Zn的引入使催化剂保持了Ni/SiO 2催化剂高的1,4-丁炔二醇加氢活性,同时可有效降低产物中2-羟基四氢呋喃副产物含量,提高目标产物1,4-丁二醇收率。     

2,1,3-苯并[c]硒二唑金属配合物的固相合成与表征

探索了硒二唑金属配合物的固相合成方法,以2,1,3-苯并[c]硒二唑(PS)为配体,与过渡金属盐MCl2(M=Co,Ni,Cu,Zn和Cd)通过固相反应合成了配合物M(PS)Cl2(M=Co,Ni)和M(PS)2Cl2(M=Cu,Zn和Cd),通过X-射线衍射(XRD)、等离子体原子发射光谱(ICP-AES)、元素分析(EA)、红外光谱(IR)、紫外可见光谱(UV-Vis)、荧光光谱(FS)和电导率等对配合物进行了表征。荧光光谱分析结果表明:配体PS在液相和固相中均没有荧光,但是与CoCl2和CdCl2配位后形成的配合物有强的荧光。     

设计和组装一组新型配位聚合物

用过渡金属与 Dpy的简单配合物为构筑块 ,用 Fe(CN) 3-6作粘接剂 ,设计和组装了 Ni( )、Co( )、Cu( )、Cr( )、Zn( )和 Cd( )的配位聚合物。该类配合物溶解度很小 ,没有培养出单晶测其结构 ,仅用元素分析、红外光谱和热分析结果进行表征。     

新型过渡金属配合物的合成、表征及生物活性研究

为了寻找更好的生物活性化合物,以1-苯基-3-甲基-5-吡唑啉酮和苯甲酰氯为原料,二氧六环为溶剂,回流反应合成了4-酰基吡唑啉酮配体及4种过渡金属配合物,通过元素分析、红外光谱、差热-热重分析、紫外光谱等对其结构进行了表征,表明配合物组成分别为:Cu(L)2、Zn(L)2、Ni(L)2、Mn(L)2;同时利用抑菌圈大小...     

糖析-HPLC法测定几种重金属离子

根据糖能引发乙腈和水的混合溶液的相分离原理,将二乙基二硫代氨基甲酸钠与Ni2＋、Co2＋、Cu2＋和Hg2＋形成的螯合物萃取到体积较小的乙腈相,实现了待测金属螯合物的浓缩富集,并在C18柱上完成了各螯合物的分离。将这种方法应用到红糖样品中Cu2＋的检测,获得了满意的结果。     

Complexes with biologically active ligands. Part 9 metal complexes of 5-benzoylamino- and 5-(3-nitrobenzoyl-amino)-1,3,4-thiadiazole-2-sulfonamide as carbonic anhydrase inhibitors

Complexes containing the anions of 5-benzoylamido-1,3,4-thiadiazole-2-sulfonamide and 5-(3-nitro-benzoylamido)-1,3,4-thiadiazole-2-sulfonamid as ligands, and V(IV); Cr(III); Fe(III); Co(II); Ni(II); Cu(II) and Ag(I) were synthesized and characterized by standard procedures (elemental analysis; IR, electronic, and EPR spectroscopy; TG, magnetic and conductimetric measurements). The original sulfonamides and their metal complexes are strong inhibitors of two carbonic anhydrase (CA) isozymes, CA I and II.     

新显色剂2-(四氮唑偶氮)-5-二乙氨基苯甲酸光度法测定钴的研究

研究了新显色剂 2 - (四氮唑偶氮 ) - 5 -二乙氨基苯甲酸 (简称 TTZDBA)与钴的显色反应 ,试剂与钴在 p H3 .5的 HAc- Na Ac缓冲溶液中形成稳定的紫红色配合物 ,其组成比为 Co2 + :TZDBA=1∶ 2 ,λmax=6 2 0 nm;试剂的 λmax为 5 0 0 nm,对比度 Δλ为 1 2 0 nm,配合物表观摩尔吸光系数为 ε=9.1 1× 1 0 4。Co2 +浓度在 0～ 0 .5 mg/L范围内符合比尔定律。配合物形成后在强酸溶液中能稳定存在 ,可消除大量金属离子的干扰 ,有良好的选择性。方法可以不经分离直接测定维生素 B12 和工业废水中的微量钴 ,结果令人满意     

2（3—（5—硝基并异噻唑）偶氮）—6—异丙基苯酚的合成及其性质研究

以２－氰基－４－硝基苯为原料合成了３－氨基－５－硝基－２，１－苯并异噻唑，并使之与邻异丙基苯酚偶联，得到２－（３－５－硝基苯并异噻唑）偶氮）－６－异丙基苯酚，它有可能成为一个敏锐的酸碱指示剂和Ｃｕ＾２＋，Ｃｏ＾２＋，Ｎｉ＾２＋等离子的显色剂。     

SOLVENT EXTRACTION OF METALS WITH 4-DINITROBENZOYL-2, 4-DIHYDRO-5-METHYL-2-PHENYL-3H-PYRAZOL-3-ONE (DMPP)

ABSTRACT

The mechanism of the extraction of copper (II), nickel (II), cobalt (II) and thorium (IV) from aqueous buffer media with 4-dinitrobenzoyl1-2, 4-dihydro-5-methyl-2-phenyl-311-pyrazol-3-one (DMPP) in benzene has been investigated. The values of log K^*where K^*refers to the extraction equilibrium Mn⁺+-nHL ? MD_n+ nH⁺are Cu(II)& lpar; + 0.3), Co(II) (?6.65), Ni(II) (?5.04) and Th(IV) ( + 6.1). Solid complexes synthesized have the composition CuL₂· 2H₂O, NiL₂· 2H₂O and ThL₄respectively (L = anion of the ligand). DMPP seems to be superior to the corresponding 4-benzoyland 4-nitrobenzoyl derivatives of 2,4-dihydro-5-methyl-2-phenyl1-3 H-pyrazol1-3-one (MPP) and also better than thenoyltrifluoroacetone, the popularly employed fluorinated β-dike tone in the system investigated.     

2-取代硫醚-5-[5-(4-氯苯基)吡唑-3-基]-1,3,4-(噁)二唑类化合物的合成及其荧光性质

以5-(4-氯苯基)-3-吡唑甲酰肼为起始原料,经关环和硫醚反应合成了6个新型的标题化合物,其结构经元素分析、IR、1HNMR表征,利用UV以及单光子液体荧光光谱探讨了其光学性质.结果表明,目标产物具有良好的荧光性质,最大发射波长在342 ～ 345 nm之间.     

The solvent extraction of nickel from acidic solutions using synergistic mixtures containing pyridinecarboxylate esters. Part 2: Systems based on alkylsalicylic acids

The synergistic solvent extraction of nickel and cobalt by pyridinecarboxylate esters (2-, 3- or 4-C₅H₄N.CO.OR) in admixture with 3-bromo- or 3-nitro-derivatives of 5-alkylsalicylic acids was studied. Nickel is extracted more strongly than cobalt in all cases and, for systems containing a given pyridinecarboxylate, the pH₅₀ values (pH values for 50% extraction) of both metals decrease in the order: alkylsalicylic acid > bromo-derivative > nitro-derivative. For systems containing a given salicylic acid, the separation between the pH₅₀ values for nickel and cobalt was found to increase in the order: pyridine 2-ester < 4-ester ≈ 3-ester. The extractability of divalent base metals from sulphate solutions by mixtures of isodecyl 3- or 4-pyridinecarboxylate and 3-bromo- or 3-nitro-5-nonylsalicylic acid in Shellsol K decreases through the series: Cu > Ni > Co ≈ Zn > Ca > Mg. In single-stage batch extraction experiments with a simulated leach liquor containing Ni 2·2, Cu 0·5, Ca 0·4 and Mg 5·0 g dm⁻³ (and smaller amounts of other base metals), adjustment of the equilibrium pH value to between 3·3 and 4·0 with magnesium oxide gave extractions of nickel and copper of 97–100%, with co-extractions of calcium and magnesium of <0·5 and <0·1%, respectively. Amongst the metals present in lower concentrations, manganese (2–5%) and lead (5–10%) were extracted only slightly whereas cobalt (40–80%), zinc (15–65%) and iron (100%) were more strongly extracted.     

Ni掺杂对Cu_3N薄膜结构与性能的影响

采用射频反应磁控溅射方法在玻璃基底上制备了Ni掺杂Cu3N薄膜,并研究了Ni掺杂对Cu3N的结构、电学性能和光学性能的影响。研究发现:Ni的加入使得Cu3N薄膜的(111)晶面向小角度偏移;随着Ni含量的增加,Cu3N薄膜的电阻率从1450×10-6Ω.cm减小到184×10-6Ω.cm,光学能隙从1.09eV增加到1.52eV。     

Fabrication of Narrow-Fraction Micropowders of NiAl-Based Refractory Alloy CompoNiAl-M5-3

Powders of new CompoNiAl M5-3 heat-resistant alloy were prepared by mechanoactivated SHS from (Ni–Al–Cr–Co–Hf)–NaCl mixtures. Ni dissolution in Al melt was found to be the motive force of combustion. Unlike the binary Ni–Al system, NiAl is formed not in the melt but in the post-combustion zone as a result of diffusion-controlled processes. Conditions for MASHS were optimized toward fabrication of a superalloy with homogeneous composition/structure and low content of gas impurities. As-prepared combustion product was disintegrated into a powder and the latter was subjected to plasma spheroidization, keeping in mind the needs of additive manufacturing. The attained degree of spheroidization was 98%. The structure and phase/chemical compositions of spherical powders did not differ from those of the synthesized powders. After plasma treatment, the content of gas impurities (О₂ and N₂) decreased.     

Biologically Active Co(II) and Ni(II) Complexes of N-(2-Thienylmethylene)-2-Aminothiadiazole

Co(II) and Ni(II) complexes Schiff base, N-(2-thienylmethylene)-2-aminothiadiazole have been prepared and characterized by their physical, spectral and analytical data. The title Schiff-base acts as NNS donor tridentate during the complexation reaction with these metal ions having a composition, [M(L)(2)]X(n) where M=Co(II) or Ni(II), L=, X=NO(3) (-), SO(4) (2-), C(2)O(4) (2-) or CH(3)CO(2) (-) and n=1 or 2 and show an octahedral geometry. In order to evaluate the effect anions upon chelation, the Schiff-base and its new complexes have been screened for their antibacterial activity against bacterial strains e.g., Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa.     

Bis[4-(methylthio)phenylmethyleneaminophenyl] disulfide, 2-[4-(methylthio)phenyl]-2,3-dihydro-1,3-benzothiazole,and its nickel(II) and cobalt(II) complexes: Synthesis,adsorption on gold surface and electrochemical characterization

2-[4-(Methylthio)phenyl]-2,3-dihydro-1,3-benzothiazole (1) and bis[4-(methylthio)phenylmethylene-aminophenyl] disulfide (2) were synthesized. Novel coordination compounds of Ni(II) and Co(II) with 2-[4-(methylthio)phenylmethyleneamino]thiophenol, M(1)₂ (M=Co (3); M=Ni (4)), were prepared by reacting 1 with M(OAc)₂·6H₂O or MCl₂·6H₂O in EtOH solution. The structure of 2 was proved by X-ray crystallography. Electrochemical behavior of 1–4 in CH₃CN solution and at the surface of a gold electrode was studied by cyclic voltammetry. The modification of the electrode by ligand 1 and its complexes with Ni²⁺ and Co²⁺ is described in detail. Two procedures were used to obtain a self-assembled monolayer of a metal complex on the gold surface: the adsorption of prepared coordination compound 3 or 4 on the electrode and the initial modification of the electrode with ligand 1 followed by the formation of a coordination complex between the ligand adsorbed on the electrode and a metal salt occurring in solution. On the basis of the electrochemical data, it was found that the structure of complexes formed on the surface differs from that of the complexes produced in solution.