喹啉-8-甲醛缩4-甲基氨基硫脲Ni(Ⅱ)/Zn(Ⅱ)/Cd(Ⅱ)/Cu(Ⅱ)配合物的合成、结构和DNA结合性质（英文）

合成并通过单晶衍射、元素分析、红外光谱表征了配合物[NiL_2]·2CH_3OH(1),[ZnL_2]·CH_3OH(2),[CdL_2]·CH_3CH_2OH(3)和[Cu_2L_2Cl_2](4)(HL为喹啉-8-甲醛缩4-甲基氨基硫脲)。单晶衍射结果表明,配合物1~3结构相似,中心金属离子与来自2个硫醇化脱质子配体L-的4个N原子和2个S原子配位,采取扭曲的八面体配位构型。而配合物4中Cu(Ⅱ)离子与1个中性配体HL和3个氯离子配位,其中2个氯离子为μ~2桥联。荧光光谱结果表明,所有配合物,尤其是4与DNA的相互作用能力明显强于配体。     

五个吡嗪缩氨基硫脲过渡金属配合物的合成、结构和荧光性质

合成并通过单晶衍射、元素分析及红外光谱表征了配合物[NiL_2](1),[Zn(HL)_2](NO_3)_2(2),[Cd(HL)_2](NO_3)_2(3),[Cu_2L_2(NO_3)_2](4)和[Cu_2(L)_2(SO_4)]·4CH_3OH (5)的结构(HL为2-乙酰-3-甲基吡嗪-缩N-乙基氨基硫脲)。单晶衍射结果表明,配合物1中,Ni(Ⅱ)离子中心与2个脱氢的缩氨基硫脲配体中的N_2S供体配位,形成扭曲的八面体配位构型。在配合物2和3中,中心Zn(Ⅱ)和Cd(Ⅱ)离子与配合物1中Ni(Ⅱ)离子配位构型相同,但缩氨基硫脲为三齿中性配体。而配合物4和5中均存在双核的Cu_2S_2中心,每个Cu(Ⅱ)均采取扭曲的四方锥配位构型,所不同的是外轴向配位点分别由单齿配位的硝酸根和μ_2-桥联的硫酸根所占据。此外,荧光光谱表明配合物1～5与DNA的相互作用强于配体。     

吡嗪酰腙配体Cu(Ⅱ)/Ni(Ⅱ)配合物的合成、晶体结构及DNA结合性质（英文）

合成并通过单晶衍射、元素分析及红外光谱表征了配合物[Ni(L)(HL)](SO_4)_(0.5)·3CH_3OH (1)和[Cu_2(L)_2SO_4]·1.5CH_3OH (2)的结构(HL为3-甲基-2-乙酰吡嗪苯甲酰腙)。单晶衍射实验结果表明,在配合物1中,Ni(Ⅱ)中心离子与2个酰肼配体的[ONN]配位原子组配位,形成扭曲的八面体配位构型;2的最小非对称单元中含有1个独立的双核Cu(Ⅱ)配合物分子,它的2个Cu(Ⅱ)中心由2个酰肼配体中的2个O原子桥联。每个Cu(Ⅱ)离子还与L-配体中的2个氮原子和η_2-SO_4~(2-)阴离子中的1个O原子配位,拥有扭曲的四方锥配位构型。此外,荧光光谱表明配合物和DNA的结合能力强于配体。     

吡唑-3,5-二(N-烷基甲酰胺)类配体的双核铜配合物的合成和结构

合成了吡唑-3,5-二(N-烷基甲酰胺)(LH_3)的一系列配合物:(LH_2)_2Cu_2(NO_3)_2·H_2O,L_2Cu_2Na_2·nH_2O。得到了(PEAH_2)_2Cu_2(NO_3)_2·H_2O的单晶结构。(PEAH_3代表吡唑-3,5-二(N-乙基甲酰胺))。从元素分析及红外光谱讨论了不同pH时配合物的配位形式。配合物的ESR谱表明了分子内两个Cu原子间有自旋交换作用。     

2,6-二乙酰吡啶类双希夫碱配合物的合成和研究 Ⅱ.Cu(Ⅱ)配合物的合成和研究

合成了五个2,6-二乙酰吡啶缩肼基硫代甲酸酯双希夫碱合铜(Ⅱ)配合物,用元素分析、磁化率、红外光谱及紫外-可见光谱等对它们进行了表征,研究了配合物的电化学性质和Cu₃L₂²X₂(X=Cl^-、SCN^-)的光电子能谱。结果表明:五个Cu(Ⅱ)配合物均为三核配合物,在Cu₃L₂²(SCN)₂中存在Cu(Ⅱ)间的自旋-交换作用。     

吡咯甲亚胺镍/铜/锌配合物的合成、荧光性质及镍、铜配合物的晶体结构

合成并表征了3个配合物NiL(1),Cu_2L_2(2)和Zn_2L_2(3)(H_2L=1,2-双(3,5-二甲基-4-乙氧羰基-吡咯-2-基)苯)。单晶衍射结果表明在配合物1中,脱质子配体用4个氮原子与金属Ni(Ⅱ)配位,中心金属离子为扭曲的平面正方形配位构型。而双核配合物2拥有双螺旋结构,每个配体桥联2个具有平面正方形配位构型的铜中心。推测配合物3和2的结构类似。此外还研究了配体和配合物的荧光性质。     

吡嗪双腙配体铜配合物的合成、结构和DNA结合性质（英文）

合成并通过单晶衍射、元素分析及红外光谱表征了配合物[Cu_4(L)_2(CH_3O)_2(CH_3OH)_4(SO_4)_2]SO_4·6CH_3OH (1)的结构(L为3-乙基-2-乙酰吡嗪双缩水合肼)。单晶衍射结果表明,在配合物1中,每个Cu(Ⅱ)离子与来自半个腙配体的2个N原子和分别来自配位甲醇、桥联甲氧基及2个不同硫酸根的单齿配位和桥联氧原子配位,形成扭曲的八面体配位构型。4个Cu(Ⅱ)离子通过对称操作形成理想的平面四核铜簇。此外,荧光光谱表明配合物1与DNA的相互作用强于配体L。     

基于香豆素Schiff碱双核Ni(Ⅱ)和立方烷型Cu_4(μ_3-O)_4的四核Cu(Ⅱ)配合物的合成、晶体结构及光谱性质（英文）

合成了2个3-氨基-4-羟基香豆素类Schiff碱双核Ni(Ⅱ)和立方烷型Cu_4(μ_3-O)_4的四核Cu(Ⅱ)配合物,[Ni(L~1)(DMF)(H_2O)]_2(1)(H_2L~1=3-((5-溴-2-羟基-亚苄基)-氨基)-4-羟基-苯并吡喃-2-酮)和[Cu_4(L~2)_4]·DMF·CH_3OH·2H_2O (2)(H_2L~2=4-羟基-3-((2-羟基-3-甲氧基-亚苄基)-氨基)-苯并吡喃-2-酮),并通过元素分析、红外光谱、紫外光谱、荧光光谱及X射线单晶衍射分析等手段进行了表征。X射线单晶衍射分析结果表明:配合物1具有双核结构,由2个金属离子和2个配体单元组成,配合物2具有立方烷型Cu_4(μ_3-O)_4的四核结构,由4个金属离子和4个配体单元组成。配合物1是单斜晶系、C2/c空间群;配合物2是四方晶系,I4_1/a空间群,且中心金属Ni(Ⅱ)和Cu(Ⅱ)离子的空间构型均为六配位的扭曲的八面体。此外,配合物1通过分子间氢键、C-H…π及π…π作用形成1D超分子链结构,配合物2通过分子内氢键和π…π作用形成3D超分子结构。此外,研究了H_2L~1,H_2L~2及其相应的Ni(Ⅱ)和Cu(Ⅱ)配合物的荧光性质。     

两个线形三核配合物的晶体结构及性质

合成并表征了2个新的线性三核配合物[Co_2~ⅢCo~ⅡL_2(μ-OAc)_4](1)和[Ni_3L_2(μ-OAc)_2(CH_3OH)_2]·2H_2O(2),其配体L为2-羟基-1,3-丙二胺和5-氟水杨醛缩合的产物。配合物1与DNA的作用通过紫外-可见光谱、荧光光谱、粘度实验和电化学方法进行了研究。紫外-可见光谱的结果表明配合物1与DNA的结合常数为2.43×10~(5 )L·mol~(-1)。荧光光谱的研究结果表明配合物1能取代溴化乙锭和DNA结合,其淬灭常数为4.92×10~(3 )L·mol~(-1)。配合物1和2的变温磁学性质研究表明在2个配合物的三金属中心之间均存在反铁磁性耦合。     

铜(Ⅱ)与反式丁烯二酸根和2,2′-联吡啶配合物的研究

合成了铜(Ⅱ)与反式丁烯二酸根和2,2＇-联吡啶形成的配合物,并进行了元素分析、红外光谱、电子反射光谱和变温磁化率等研究,确定其组成为[Cu_2(fum)(bipy)_4][fum]·12H_2O,其中bipy=2,2＇-联吡啶,fum=反式丁烯二酸根.测定了配合物的晶体结构,[Cu_2(fum)(bipy)_4][fum]·12H_2O晶体属三斜晶系,P1(＃2)群;晶胞参数:α=1.0697(2)nm,b=1.2820(2)nm,c=1.0470(3)nm,α=101.88(2)°,β=101.93(2)°,γ=79.41(1)°;Z=1,最终偏离因子R=0.033.分子为反式丁烯二酸根桥联两个Cu(Ⅱ)单元的双核结构,每个Cu(Ⅱ)具有畸变的三角双锥配位环境.变温磁化率研究表明,配合物中存在弱的铁磁性偶合作用.     

2,6—二乙酰吡啶类双希夫碱配合物的研究——Ⅲ.Co(Ⅱ)、Ni(Ⅱ)、Zn(Ⅱ)、Pb(Ⅱ)和Cd(Ⅱ)配合物的合成和表征

制备了由2,6—二乙酰吡啶和肼基硫代甲酸酯衍生的希夫碱C_5H_3N[CH=NNHC(S)XR]_2(X=S,R=CH_3、C_6H_5CH_2;X=O,R=C_6H_5CH_2).离析出类型为MC_5H_3N[CH=NN=C(S)XR]_2(M=Co~(2+)、Ni~(2+)、Zn~(2+)、Pb~(2+)和Cd~(2+))的希夫碱配合物.配合物为元素分析、红外、可见—紫外光谱以及磁化率测量所表征.结果指出:上述希夫碱均为N_3S_2型五齿配体.     

Copper(II) mediated anion dependent formation of Schiff base complexes

A tetranuclear mixed ligand copper(II) complex of a pyrazole containing Schiff base and a hydroxyhexahydropyrimidylpyrazole and copper(II) and nickel(II) complexes of the Schiff base having N-donor atoms have been investigated. A 2 equiv amount of 5-methyl-3-formylpyrazole (MPA) and 2 equiv of 1,3-diamino-2-propanol (1,3-DAP) on reaction with 1 equiv of copper(II) nitrate produce an unusual tetranuclear mixed ligand complex [Cu4(L1)2(L2)2(NO3)2] (1), where H2L1 = 1,3-bis(5-methyl-3-formylpyrazolylmethinimino)propane-2-ol and HL2 = 5-methyl-3-(5-hydroxyhexahydro-2-pyrimidyl)pyrazole. In contrast, a similar reaction with nickel(II) nitrate leads to the formation of a hygroscopic intractable material. On the other hand, the reaction involving 2 equiv of MPA and 1 equiv each of 1,3-DAP and various copper(II) salts gives rise to two types of products, viz. [Cu(T3-porphyrinogen)(H2O)]X2 (X = ClO4, NO3, BF4 (2)) (T3-porphyrinogen = 1,6,11,16-tetraza-5,10,15,20-tetrahydroxy-2,7,12,17-tetramethylporphyrinogen) and [Cu(H2L1)X]X x H2O (X = Cl (3), Br (4)). The same reaction carried out with nickel(II) salts also produces two types of compounds [Ni(H2L1)(H2O)2]X2 [X = ClO4 (5), NO3 (6), BF4 (7)] and [Ni(H2L1)X2] x H2O [X = Cl (8), Br (9)]. Among the above species 1, 3, and 5 are crystallographically characterized. In 1, all four copper atoms are in distorted square pyramidal geometry with N4O chromophore around two terminal copper atoms and N5 chromophore around two inner copper atoms. In 3, the copper atom is also in distorted square pyramidal geometry with N4Cl chromophore. The nickel atom in 5 is in a distorted octahedral geometry with N4O2 chromophore, where the metal atom is slightly pulled toward one of the axial coordinated water molecules. Variable-temperature (300 to 2 K) magnetic susceptibility measurements have been carried out for complex 1. The separations between the metal centers, viz., Cu(1)...Cu(2), Cu(2)...Cu(2)A, and Cu(2)A...Cu(1)A are 3.858, 3.89, and 3.858 A, respectively. The overall magnetic behavior is consistent with strong antiferromagnetic interactions between the spin centers. The exchange coupling constants between Cu(1)...Cu(2) and Cu(2)...Cu(2A) centers have turned out to be -305.3 and -400.7 cm(-1), respectively, resulting in a S = 1/2 ground state. The complexes are further characterized by UV-vis, IR, electron paramagnetic resonance, and electrochemical studies.     

空间不对称席夫碱铜配合物的合成及其与金属卟啉的反应

合成了新型具有空间不对称四齿席夫碱配合物 (Cu[XBP- PHEN- 4 - CHO- Im] ,X=H,Cl,Br,CH3 ;Cu[CBP- PHEN- 2 - CHO- Im] ,C=Cl)。并进行了红外、元素分析、质谱等表征。研究了此类席夫碱铜配合物在二氯甲烷溶剂中与四苯基卟啉锌 (Zn TPP)反应的电子光谱 ,结果表明 ,此类席夫碱铜 ( )配合物可以与锌卟啉发生轴向配位反应。     

SYNTHESIS, CHARACTERIZATION AND SELECTIVITY STUDIES OF POLY(ACRYLAMIDE) INCORPORATING SCHIFF BASES

Three novel polymers incorporating Schiff bases,derived from condensation reactions of poly(acrylamide) with 5- chloro-2-hydroxybenzaldehyde,5-bromo-2-hydroxybenzaldehyde and 5-methyl-2-hydroxybenzaldehyde,have been synthesized,and their Cu(Ⅱ) and Ni(Ⅱ) complexes have been prepared.The ~1H-NMR signals of the—CH=N—and—NH_2 groups have been utilized to determine the relative abundances of Schiff base and acrylamide groups in the polymers containing Schiff bases.Poly(acrylamide) incorporating Schiff bases a...     

First structural example of a metal uncoordinated mesoionic imidazo[1,5-a]pyridine and its precursor intermediate copper complex: an insight to the catalytic cycle

Four copper complexes of a tridentate Schiff base ligand, 2-pyridyl-N-(2'-methylthiophenyl) methyleneimine, L(1) have been synthesized. All theses species, namely, [L(1)Cu(2)(SCN)(3)](n) (1), [Cu(SCN)(CH(3)CN)](n) (3), [(L(1))Cu(N(3))(Cl)] (4) and [(L(1))Cu(N(3))(SCN)] (5) have been structurally characterized. Complex 1 in acetonitrile promotes cycloaddition of a Cu(II) bound SCN(-) ion to L(1) that exclusively and stoichiometrically forms a mesoionic imidazo[1,5-a]pyridine, namely, 3-(imino-N'-2-methylthiophenyl)imidazo[1,5-a]pyridinium-1-thiolate (2) and a thiocyanato bridged Cu(i) complex, [Cu(SCN)(CH(3)CN)](n) (3). The X-ray crystal structure of 1 confirms the presence of square-pyramidal Cu(II) and tetrahedral Cu(I) ions in N(3)S(2) and N(2)S(2) coordination environments, respectively, bridged to each other via thiocyanate anion. The Cu(II) ions are bonded to a tridentate ligand L(1) and two SCN(-) ions occupy the remaining equatorial and an axial coordination site to adopt a square-pyramidal coordination geometry. To investigate which SCN(-) ion, axially or equatorially bound to Cu(II) center, underwent cycloaddition to L(1) to form 2, two mononuclear Cu(II) complexes 4 and 5 have been synthesized and their reactivity towards externally added KSCN was studied. The molecular structures of 4 and 5 feature a meridionally bound L(1) and an azide ion (N(3)(-)) in the square plane, while a Cl(-) or SCN(-) ion are occupying the axial site, respectively, to fulfill square-pyramidal coordination geometry. Complex 4 reacts with SCN(-) ion to form 5. That an MeCN solution of 5 itself, or of 5 in the presence of KSCN, does not produce 2, supports that possibly the Cu(II) bound equatorial SCN(-) ion is responsible for cycloaddition to L(1). Dark purple solid 2 has also been prepared (turnover number ~4 or 41% yield) efficiently following an alternative and easier one-pot synthesis procedure, that is from a mixture of KSCN and L(1) in the presence of a catalytic amount of anhydrous CuCl(2) (10 mol%) in MeCN in air. The X-ray crystal structure, (1)H NMR spectrum and solution conductivity measurements strongly support that 2 is mesoionic. An MeCN solution of 2 fluoresces at room temperature upon excitation at 240 nm with an emission maximum λ(em) at 470 nm, associated with a quantum yield of 0.16 with respect to a standard Rhodamine-6G fluorophore.     

Ruthenium(II) complexes containing the pentadentate SNNNS chelating ligand 2,6–diacetylpyridine bis(4–(p-tolyl)thiosemicarbazone). Synthesis,reactivity and electrochemistry

Ruthenium(II) heptacoordinate complexes containing the pentadentate SNNNS chelating ligand 2,6–diacetylpyridine bis(4–(p-tolyl)thiosemicarbazone) (L1H2) have been prepared. The compounds were of the type Ru(L1H2)X2 [X=Cl (1);Br (2); SCN (3)],[Ru(L1H2)- (Y)Cl]Cl [Y=imidazole (4); pyridine-N-oxide (5)] and [Ru(L1H2)(PPh3)X]Y, [X=Cl (6), (7);Br (8); Y=ClO4/ PF6]. The complexes were characterised by i.r., u.v.–vis. and n.m.r. spectroscopy and their electrochemical behaviour was examined by cyclic voltammetry. They exhibit a reversible to quasi-reversible RuII/RuIII couple in MeCN solution at a glassy carbon working electrode using an Ag/AgCl electrode as the reference. This revised version was published online in June 2006 with corrections to the Cover Date.     

Ligand-controlled mixed-valence copper rectangular grid-type coordination polymers based on pyridylterpyridine

Six mixed-valence Cu(I)Cu(II) compounds containing 4'-(4-pyridyl)-2,2':6',2' '-terpyridine (L1) or 4'-(2-pyridyl)-2,2':6',2' '-terpyridine (L2) were prepared under the hydrothermal and ambient conditions, and their crystal structures were determined by single-crystal X-ray diffraction. Selection of CuCl(2).2H(2)O or Cu(CH(3)COO)(2).H(2)O with the L1 ligand and NH(4)SCN, KI, or KBr under hydrothermal conditions afforded 1-dimensional mixed-valence Cu(I)Cu(II) compounds [Cu(2)(L1)(mu-1,1-SCN)(mu-Cl)Cl](n) (1), [Cu(2)(L1)(mu-I)(2)Cl](n) (2), [Cu(2)(L1)(mu-Br)(2)Br](n) (3), and [Cu(2)(L1)(mu-1,3-SCN)(2)(SCN)](n)(4), respectively. Compound 5, prepared by layering with CuSCN and L1, is a 2-dimensional bilayer structure. In compounds 1-5, the L1 ligand and X (X = Cl, Br, I, SCN) linked between monovalent and divalent copper atoms resulting in the formation of mixed-valence rectangular grid-type M(4)L(4) or M(6)L(6) building blocks, which were further linked by X (X = Cl, Br, I, SCN) to form 1- or 2-dimensional polymers. The sizes of M(4)L(4) units in 1-4 were fine-tuned by the sizes of X linkers. Reaction of Cu(CH(3)COO)(2).H(2)O with L2 and NH(4)SCN under hydrothermal conditions gave mixed-valence Cu(I)Cu(II) compound [Cu(2)(L2)(mu-1,3-SCN)(3)](n) (6). Unlike those in 1-5, the structure of 6 was constructed from thiocyanate groups and the pendant pyridine of L2 left uncoordinated. The temperature-dependent magnetic susceptibility studies on compounds 1 and 4 showed the presence of mixed-valence electronic structure.     

Increasing structure dimensionality of copper(I) complexes by varying the flexible thioether ligand geometry and counteranions

This work focuses on the systematic investigation of the influences of pyrimidine-based thioether ligand geometries and counteranions on the overall molecular architectures. A N-containing heterocyclic dithioether ligand 2,6-bis(2-pyrimidinesulfanylmethyl)pyridine (L1) and three structurally related isomeric bis(2-pyrimidinesulfanylmethyl)benzene (L2-L4) ligands have been prepared. On the basis of the self-assembly of CuX (X = I, Br, Cl, SCN, or CN) and the four structurally related flexible dithioether ligands, we have synthesized and characterized 10 new metal-organic entities, Cu4(L1)2I4 1, Cu4(L1)2Br4 2, [Cu2(L2)2I2.CH3CN]n 3, [Cu(L3)I]n 4, [Cu(L3)Br]n 5, [Cu(L3)CN]n 6, [Cu(L4)CN]n 7, [Cu2(L4)I2]n 8, [Cu2(L4)(SCN)2]n 9, and [[Cu6I5(L4)3](BF4).H2O]n 10, by elemental analyses, IR spectroscopy, and X-ray crystallography. Single-crystal X-ray analyses show that the 10 Cu(I) complexes possess an increasing dimensionality from 0D (1 and 2) to 1D (3-5) to 2D (6-9) to 3D (10), which indicates that the ligand geometry takes an essential role in the framework formation of the Cu(I) complexes. The influence of counteranions and pi-pi weak interactions on the formation and dimensionality of these coordination polymers has also been explored. In addition, the photoluminescence properties of Cu(I) coordination polymers 4-10 in the solid state have been studied.     

Synthesis,spectral characterization and biological activity of benzofuran Schiff bases with Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II) complexes

New Schiff bases have been synthesized from benzofuran-2-carbohydrazide and benzaldehyde, [BPMC] or 3,4-dimethoxybenzaldehyde, [BDMeOPMC]; complexes of the type MLX₂, where M = Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II), L = BPMC or BDMeOPMC and X = Cl, have been prepared. Structures have been elucidated on the basis of elemental analysis, conductance measurements, magnetic properties, spectral studies i.e., ¹H NMR, electronic, ESR and IR studies show that the Schiff bases are bidentate through the azomethine nitrogen and oxygen of the carbonyl. We propose tentative structures for all of these complexes. The antifungal and antibacterial activities of the ligands and their metal complexes have been screened against fungi Aspergillus niger and Aspergillus fumigatus and against bacteria Escherichia coli and S. aurious.