钪—铬天青S—镍—邻菲罗啉混合多核配合物显色反应的研究

在弱酸介质中，钪与铬天青Ｓ形成的阴离子配合物，可以和镍－邻菲啉配阳离子通过静电引力成缔合型混合多核配合物。本文详细地研究了钪一铬天青Ｓ－镍－邻菲罗啉配合物的形成条件及反应过程。配合物的最大吸收峰位于６３０ｎｍ处，摩尔吸光系数ε５３０＝３．３１×１０＾４Ｌ．ｍｏｌ＾－＾１．ｃｍ＾－＾１，各组分的摩尔比；Ｓｃ＋ＣＡＳ＋Ｎｉ＋Ｐｈｅｎ＝２＋６＋３＋３，相应的分子式为［Ｓｃ（ＣＡＳ）３］２［ＮｉＰｈｅｎ     

钪—偶氮氯膦Ⅲ—铜—邻菲罗啉混合多核配合物显色反应研究

本文研究了钪—偶氮氯膦Ⅲ—铜—邻菲罗啉配合物的形成条件。在pH3.6醋酸钠—盐酸介质中配合物的最大吸收峰在606nm处,摩尔吸光系数ε_(606)=7.02×10~(-4)L·mol~(-1)·cm~(-1)。配合物各组分摩尔比Sc∶R ∶Cu∶Phen=1∶1∶1∶3。分子式为[ScOH·H_4R][Cu(Phen)_3]。应用于以铜基合金合成试样中钪的直接测定,结果较好。     

钪—铋—三溴偶氮胂混合多核络合物显色反应及其在钪光度分析中应用研究

本文研究了钪-铋-三溴偶氮胂络合物的共显色反应。实验表明,共显色反应是由于形成混合多核络合物所致。钪络合物最大吸收峰在635nm,表观摩尔吸光系数为7.1×10~4L·mol~(-1)·cm~(-1)。钪在0～5μg/25ml遵守比尔定律。     

钪-钙-茜素S异多核络合物的极谱吸附波

报道了钪－钙－茜素Ｓ（ＡＲＳ）异多核络合物极谱吸附波的形成及利用它测定钪的最佳实验条件。用此方法测定了矿石中的微量钪,并初步探讨了该极地的性质和电极反应机理。在单扫描极谱上用等魔鬼洋连续变化法和单纯形法测得络合物组成的摩尔比为ｎｓｃ＾３＋,ｎｃａ＾２＋;ｎＡＲＳ＝２：１：２。     

钪-钇-茜素红S异多核络合物极谱吸附波的研究

报道了钪－钇－茜素红Ｓ异多核铬合物的形成及该异多核络合物极谱吸附波测定钪的最佳实验条件。用此方法测定了纯氧化钇中的微量钪,并探讨了该极谱波的性质和电极反应机制。在单扫描示波极谱上用单纯形法和改良的平衡移动法测得该异多核络合物组成的摩尔比为：ｘＳｅ＾３＋：ｘＹ＾３＋：ｘＡＲＡ＝１：２：５。     

稀土-铬天青S-邻菲啰啉体系中混合胶束的形成及分析应用

在多元络合物RE-CAS-Phen-CTAB中引入非离子表面活性剂Triton-X100,提高了钇组稀土元素反应的灵敏度,其摩尔吸光系数为1.45×10~5;改变了铬合物的组成,Y:CAS=1:3;展宽了反应的pH范围,pH在8.5～11.5之间络合物均可稳定存在;提高了反应的选择性,大量的铈组元素(La-Gd)和大多数非稀土元素均不干扰钇组稀土的测定。提出了直接测定铈组稀土元素中的微量钇组元素的新方法。     

铅—铋—三溴偶氮胂混合多核络合物显色反应的研究及应用

研究了铅－铋－三溴偶氮胂络合物的显色反应条件。试验表明，显色反应帅于形成混合多核络合物所致，铅络合物的最大吸收峰在６３８ｎｍ。获得满意结果。     

钪 钇茜素红S异多核络合物极谱吸附波的研究

报道了钪钇茜素红Ｓ异多核络合物的形成及该异多核络合物极谱吸附波测定钪的最佳实验条件。用此方法测定了纯氧化钇中的微量钪, 并探讨了该极谱波的性质和电极反应机制。在单扫描示波极谱上用单纯形法和改良的平衡移动法测得该异多核络合物组成的摩尔比为： ｘＳｃ３＋ ∶ｘＹ３＋ ∶ｘＡＲＳ＝１∶２∶５ 。     

镧与氨荒乙酸钴多核配合物的合成及抗癌活性

在微波辐射下用低温固相配位反应合成出多核配合物．通过元素分析确定配合物组成为Ｌａ２（ＣｏＬ２）３（Ｌ＝－Ｓ２ＣＮＨＣＨ２ＣＯ－２），并研究了该配合物的摩尔电导、红外光谱、紫外光谱和核磁共振氢谱．配合物的抗癌活性测定结果表明Ｃｏ（ＨＬ）２和Ｌａ２（ＣｏＬ２）３有一定的抗癌活性；Ｌａ２（ＣｏＬ２）３对肝癌细胞生长有显著抑制作用，对正常肝细胞的生长无影响．     

Scandium Reduced Arene Complex: Protonation and Reaction with Azobenzene

The reactivity of the reduced anthracene complex of scandium [Li(thf)₃][Sc{N(tBu)Xy}₂(anth)] ( 2-anth-Li ) (Xy=3,5-Me₂C₆H₃; anth=C₁₄H₁₀²⁻, thf=tetrahydrofuran) toward Brønsted acid [NEt₃H][BPh₄] and azobenzene is reported. While a stepwise protonation of 2-anth-Li with two equivalents of [NEt₃H][BPh₄] afforded the scandium cation [Sc{N(tBu)Xy}₂(thf)₂][BPh₄] ( 3 ), reduction of azobenzene gave a thermolabile, anionic scandium reduced azobenzene complex [Li(thf)][Sc{N(tBu)Xy}₂(η²-PhNNPh)] ( 4 ), which slowly lost one of the anilide ligands to form the neutral scandium azobenzene complex dimer [Sc{N(tBu)Xy}(μ-η²:η²-Ph₂N₂)]₂ ( 5 ). Exposure of 3 to CO₂ produced the scandium carbamate complex [Sc{κ²-O₂CN(tBu)(Xy)}₂][BPh₄] ( 6 ) as a result of CO₂ insertion into the Sc−N bonds. In an attempt to prepare scandium hydrides, the reaction of 3 with the hydride sources LiAlH₄ and Na[BEt₃H] led to the terminal aluminum hydride [AlH{N(tBu)Xy}₂(thf)] ( 7 ) and the scandium n-butoxide [Sc{N(tBu)(Xy)}₂(μ-OnBu)] ( 8 ) after Sc/Al transmetalation and nucleophilic ring-opening of THF, respectively. All reported compounds isolated in moderate to good yields were fully characterized.     

Synthesis and Structural Characterization of One-dimensional Polynuclear Complex [La(bipyN2O2)(TFA)3]n

Some of rare earth-β-diketone-2,2'-bipyridyl-N,N'-dioxide ternary complexes have been studied1,2. Very few work dealing with 4,4'-bipyridyl-N,N'-dioxide complex appeared. In our previous work, some ternary complexes of europium with β-diketones and 4,4'-bipyridyl-N,N'-dioxide with the formula of Ln (β-dik)3·0.5(bipyN2O2) have been isolated and well characterized.3 Here we report a newly synthesized ternary complex [La (bipyN2O2) (TFA)3]n. Crystal analysis showed it had an infinite on…     

膦桥多核银络合物[Ag4(dppe)3(NO3)4]的合成与结构

A new polynuclear silver complex with bridging diphorsphine ligand has been synthesized and characterized by :single cryatsl X-ray diffraction method The compound crystallizes in the triclinic space group P1 with a=1.27489, b=1.34715, c=1.47015 nm; α=59.747, β=63.949, γ=70.196°; V=1.9369 nm. The simplest formularis [Ag_4· dppe)_3(NO_3)_4], Mr=1874.79, D_c=1.607 g·cm~(-3), Dm=1.62 g·cm~(-3), μ(MoKa)=11.69 cm~(-1), F(OOO)=942. The structure was solved by conventional heavy-atom techniques and refined by full-matrix least squares to give discrepany indices of R=0.048 and RW=0.060(W=1/[σ(Fo)~2+(PWT*Fo)~2+QWT]-Fo) for 5052 reflections. An empirical absorption correction program DIFABS was performed.Silver atoms are linked by bridging ligands of dppe and nitrate, forming a network extending in space. Each structural unit contains two binuclear subunits, of which silver atoms are bridged by nitrates. The two subunits are connected by one dppe ligand. Silver atoms are not equivalent in subunit and one of the nitrates functions not only as a monodentate bridging ligand, but also as an asymmetric bidentate chelating lingand. All coordinate configurations of silver are shown as distorted tetrahedron.     

CTMAB存在下钪多元络合物的研究

本文系统研究了在阳离子表面活性剂存在下钪与溴邻苯三酚红及三乙烯四胺形成多元络合物的条件，测定了络合物的最大吸收波长和摩尔吸光系数，确定了络合物的组成。并初步探讨了反应机理。     

Novel Roles of Metal Ions in Layered Self-assembled Films of Polynuclear Complexes on Their Photoinduced Electron Transfer Properties

Three metal ion bridged self-assembled(SA)films of cis-di(thiocyanato)-bis(2,2'-bipyridyl-4,4'-dicarboxylate)ruthenium were fabricated and characterized by contact angle,UV spectra,cyclic voltammetry and XPS.Theirphotoinduced electron transfer properties(PETP)were examined.Among the titled systems,the highest steady an-odic photocurrent of 1773—1843 nA/cm~1 and the highest quantum yield of 3.2% were achieved.The effects of in-cident light intensity,bias voltage,and electron donor were also studied.The possible mechanism of electron trans-fer was proposed.The results reveal that different metal ion in SA films could affect significantly the photoinducedelectron transfer property.Our experimental results clearly show that bridging metal ions can play both functionaland structural roles in these self-assembled systems.This method of forming functional films can provide a new ap-proach to regulate the property of similar systems.