A Kinetic Study on Dismutation of Superoxide Ion by Macrocyclic Dioxotetramine-Copper(Ⅱ) Complex by Using Pulse Radiolysis

We studied the reaction kinetics of dismutation for superoxide ion by copper (Ⅱ) complex of macrocycllc dioxotetramine ligand 12- ( 4' - nitro )- benzyl-1,4,7,10- tetraazacy-clotridecane-11,13-dionato copper (Ⅱ) by using pulse radiolysis. The rate constants of dismutation kcat's were measured to be 1. 78×106 mor-1 . L.s-1(at pH 7. 0) and 1. 06×106 mol-1. L. s-1(at pH 7. 8). The reaction mechanism is similar to that catalyzed by super-oxide dismutase.

Crystal Structure,Fluorescence and Thermal Stability Properties of a Dinuclear Copper(Ⅱ) Complex[Cu_2(L)_2(phen)_2]-5H_2O(H_2L = Bicycle[2.2.1]hept-2-en-5,6-dicarboxylic acid)

A new dinuclear copper（II） complex [Cu2（L）2（phen）2]·5H2O （1） with bicycle[2.2.1 ]hept- 2-en-5, 6-dicarboxylic acid （H2L） and 1,10-phenanthroline （phen） as ligands has been synthesized in the mixed solvents of ethanol and water. It crystallizes in the monoclinic space group P21/c, with a = 17.925（4）, b = 19.908（4）, c = 11.235（2） A, β = 97.65（3）°, V= 3973.4（14） A3, Dc = 1.552 g/cm^3, Z = 8, F（000） = 1910, the final GOOF = 1.056, R= 0.0519 and wR= 0.1293. The crystal structure shows that the whole molecule consists of two independent dinuclear units, in which two copper ions are bridged by twoμ2-η1 ：η0-3-carboxylate groups of L^2- anions. The fluorescence and thermal stability properties of 1 were studied. The results show that 1 has an intense fluorescent emission at around 381 rim. The TG analysis shows that I is stable below 143 ℃.

Syntheses and Structures of Three Hybrid Materials Using Vanadium Polyoxoanions and Macrocyclic Copper Complex as Building Blocks

The reactions of the four-coordinated macrocyclic copper complex [CuL]（ClO4）2（L = 1,4,8,11-tetraazacyclotetradecane） with NH4VO3 under different conditions gave three inorganic-organic hybrid materials of [CuL][VO3]2·2.33H2O（1）, [CuL]3[V（10）O（28）]·8H2O（2） and [Cu L]3[V6O（18）]·8H2O（3）. Single-crystal X-ray diffraction analyses reveal that three diverse vanadium polyoxoanions, [V6O（18）]6- ring, [V（10）O（28）]6- cluster, and [V（12）O（35）]^10- ring, were isolated from the same reactant NH4VO3 under different conditions. The [CuL]^2＋ bridges the [V10O28]6- clusters to form a two-dimensional sheet in 2, and link the [V6O（18）]^6- rings in 1 and [V（12）O（35）]^10- rings in 3 into three-dimensional frameworks, respectively.

Synthesis and Crystal Structure of a Novel Dinuclear Copper(Ⅱ) Complex Containing Benzimidazole Schiff Base Ligand

A novel dinuclear copper（Ⅱ） complex [CuL（NO3）]2·2MeOH was obtained by the coordination reaction of Cu（NO3）2·3H2O with ligand HL （HL=N-（methyl-2-benzimidazol- methylidene）-2-hydroxyaniline）. The single-crystal X-ray analysis has revealed that the complex crystallizes in triclinic, space group P with a=9.535（3）, b=10.009（3）, c=10.666（4） , α=104.303（4）, β=100.105（4）, γ=115.917（4）o, V=839.0（5） 3, C16H16CuN4O5, Mr=407.87, Z=2, Dc=1.614 g/cm3, F（000）=418, μ=1.338 mm-1, R=0.0543 and wR=0.0980. The basic dinuclear copper（Ⅱ） complex units [CuL（NO3）]2 are formed by NO3- as co-bridging ligands and L as NNO tridentate chelate coordinating to the copper ions. The ladder-like one-dimensional chain motifs are formed by O…H-O and O…H-N hydrogen bonds from methanol molecules connecting the dinuclear copper（Ⅱ） units.

Crystal Structures of Dinuclear Copper(Ⅱ) Complexesof bis (1,4,7-triazacyclononane) Ligands Containing Rigid Bridging Groups

Dinuclear Cu(Ⅱ) complexes (Cu,LCl4). 2H2O and Cu2L'Cl4 are pre-pared and characterized by X-ray structure analysis. (Cu2I-Cl4). 2H2O, C20 H40N6Cu2Cl4O2, Mr=665. 54, monoclinic, 6 for 188l observed reflections with I>3(I). Cu2L'Cl4, C20H36N6Cu2Cl4, M.=629. 41, monoclinic, for 1330 observed reflections with I>3(I). In both complexes the stereo-chemistry about Cu(Ⅱ) is 5-coordinated with two secondary amine N atoms and twoCl- occupying sites at the base of a distorted square pyramid capped by the tertiaryamine N atom. The pair of Cl' attached to the two Cu(Ⅱ) are held in anti configuration.

Electrochemical and Spectroscopic Studies on the Interaction between Tetracoordinate Macrocyclic Copper（Ⅱ）, Nickel（Ⅱ） and Cobalt（Ⅲ） Complexes with DNA

Mononuclear copper（Ⅱ）, nickel（Ⅱ） and cobalt（Ⅲ） tetracoordinate macrocyclic complexes were synthesized and spectroscopically characterized. The crystal structure of the three compounds were determined by X-ray crystallography. The electrochemical experimental results indicate that the three complexes could interact with DNA mainly by electrostatic interaction. The interaction of tetracoordinate macrocyclic cobalt（Ⅲ） complex with DNA was studied by cyclic voltammetry and UV-vis spectroscopy. The experimental results reveal that tetracoordinate macrocyc- lic cobalt（Ⅲ） complex could interact with DNA by electrostatic interaction to form a 1 ： 1 DNA association complex with a binding constant of 7.50 ×10^3 L·mol^-1.

Accelerated Hydrolysis of p-Nitrophenyl Picolinate Catalyzed by Metallomicelle Made from a Novel Macrocyclic Polyamine Copper（Ⅱ） Complex

A copper（Ⅱ） complex 1 of a novel macrocyclic polyamine ligand with hydroxylethyl pendant groups, 4,11-bis（hydroxylethyl）-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane （L） has been synthesized and characterized. Rate enhancement for hydrolysis of p-nitrophenyl picolinate （PNPP） catalyzed by 1 was studied kinetically under Brij35 micellar condition. For comparision, the catalytic activity of corresponding copper（Ⅱ） complex 2 of non-substituted macrocyclic polyamine ligand, 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraaza-cyclotetradecane （L＇） toward the hydrolysis of PNPP was also investigated. The results indicate that the macrocyclic polyamine copper（Ⅱ） complex 1 effectively catalyzed the hydrolysis of PNPP, and the pendant ligand hydroxyl group or deprotonated pendant ligand hydroxyl group can act as catalytically active species in the reaction. A ternary Complex kinetic model involving metal ion, ligand and substrate has been proposed, and the results confirmed the reasonability of such kinetic model.

Synthesis and Characterization of New Macrocyclic Cu（Ⅱ） Complexes from Various Diamines, Copper（Ⅱ） Nitrate and 1,4-Bis（2-formylphenoxy）butane

Six new macrocyclic complexes were synthesized by a template reaction of 1,4-bis（2-formylphenoxy）butane with diamines and Cu（NO3）2·3H2O and their structures were proposed on the basis of elemental analysis, FT-IR, UV-Vis, magnetic susceptibility measurements, molar conductivity measurements and mass spectra. The metal to ligand molar ratios of the Cu（Ⅱ） complexes were found to be 1 ： 1. The Cu（Ⅱ） complexes are 1 ： 2 electrolytes as shown by their molar conductivities （∧m） in DMF at 10^-3 mol·L^-1. Due to the existence of free ions the Cu（Ⅱ） complexes are electrically conductive. Their configurations were proposed to be probably distorted octahedral.

脉冲辐解法研究大环二氧四胺铜(Ⅱ)配合物歧化超氧离子的动力学

用脉冲辐解法研究大环二氧四胺配体的铜配合物12-(4~1-硝基)-苄基-1,4,7,10-四氮杂环十三烷-11,13-二酮合铜(Ⅱ)歧化超氧离子的动力学,求得其歧化速率常数K_(cat)为1.78×10~6 mol^(-1)·L·s^(-1)(pH=7.0)和1.06×10~6 mol^(-1)·L·s^(-1)(pH=7.8)。其反应机理与超氧歧化酶有类似之处。

双核Cu(Ⅱ)-2,4-二羟基苯甲醛缩邻氨基苯甲酸Schiff碱配合物的合成、表征和晶体结构

The novel dinuclear copper(Ⅱ) complex with with N (2,4 dihydroxybenzalidene) o aminobenzoic acid ligand, [Cu(C14H9NO4)]2· 2H2O, has been synthesized and characterized by elemental analysis, IR, UV Vis and thermal analysis. Its crystal structure was determined by single crystal X ray diffraction techniques. The crystal belongs to monoclinic with space group P21/c. The cell parameters are: a=0.82510(11)nm, b=0.68870(9)nm, c=2.3007(3)nm, β =100.847(2)° , V=1.2840(3)nm3, Z=2, Dc=1.742Mg· m- 3, μ (MoKα )=1.723mm- 1, F(000)=684. The structure was refined to final R1=0.0267, wR2=0.0735. The complex molecule structure has dinuclear centrosymmetric dimeric structure in which a planar Cu2O2 core features. The ligand N (2,4 dihydroxybenzalidene) o aminobenzoic acid dianion is μ 2 tridentate, chelating one copper? ion via one nitrogen, one hydroxy oxygen atom and one carboxylate oxygen atom, and the hydroxy oxygen atom simultaneously coordinates to the other copper? ion of the dimer. In the structure the copper? ion rendered four coordination in a distorted square planar geometry structure. CCDC: 212695.

双大环多胺Zn(Ⅱ)配合物及其与DNA作用的溴乙锭荧光探针

以1,4,7,10-四氮杂环十二烷(Cyclen)为原料合成的一种新型双大环多胺配体及其双核Zn2+配合物,其结构用1HNMR、质谱和元素分析等测试技术进行了表征。以溴乙锭(EB)为探针,用荧光光谱法研究了双环多胺配体及其Zn(Ⅱ)配合物与小牛胸腺DNA的作用,当cComplex6/cDNA=0.51时,DNA/EB体系的荧光强度降低至原来的47.3%,表明双大环配合物是以嵌入方式与小牛胸腺DNA结合。化合物对DNA/EB体系的荧光猝灭顺序为:双大环多胺双核Zn(Ⅱ)配合物>双大环多胺配体>四氮杂环多胺-Zn(Ⅱ)配合物>四氮杂环多胺。

铜(Ⅱ)-5-取代邻菲啰啉-二氧四胺大环三元体系的稳定性研究

用pH法在25±0.1℃、I＝0．lmol·dm－3KNO3条件下研究了钢（Ⅱ）与13－（2’-羟基-3’、5’-取代苄基）－1，4，8，11-四氮杂环十四烷-12，14-二酮所形成的二元配合物的稳定性以及铜（Ⅱ）－5-取代-1，10-邻菲啉与13－（2’-羟基-3’，5’-取代苄基）－1，4，8，11-四氮杂环十四烷-12，14-二酮所形成的三元配合物的稳定性，并探讨了大环配体的取代基效应及二元、三元配合物的结构．

配合物的直线自由能关系（ⅩⅤⅡ）──铜（Ⅱ）－二氧四胺大环－α－氨基酸三元混配配合物的稳定性研究

用ｐＨ法在２５．０±０．１℃、Ｉ＝０．１ｍｏｌ／ＬＫＮＯ３条件下研究了铜（Ⅱ）与１２－（２＇－羟基－５取代苄基）－１，４，７，１０－四氮杂环十三烷－１１，１３－二酮－α－氨基酸所形成的竞争性三元混配型配合物的稳定性，测定了该体系的二元、三元配合物的稳定常数，并探讨了大环配体的取代基效应及二元、三元配合物的结构。

双核铜(Ⅱ)配合物在H_2O_2存在下对DNA的氧化切割活性(英文)

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.

双核铜(Ⅱ)配合物{[Cu(Phen)(Nap)2]2·(EtOH)2·(H2O)2}(Phen=1，10-菲咯啉，Nap=1-萘甲酸，EtOH=--乙醇)的合成、晶体结构及性质

合成了一种新型的配合物{[Cu（Phen）（Nap）2]2·（EtOH）2·（H2O）2}（Phen=1，10-菲咯啉，Nap=1-萘甲酸，EtOH=乙醇）。通过元素分析、红外光谱、热重等测试技术对其进行了表征，同时用X射线单晶衍射确定了其晶体结构，其配合物为双核铜结构。利用循环伏安法和发射光谱研究了该配合物的电化学和发光性能；采用紫外光谱和荧光光谱法研究了配合物与小牛胸腺DNA（ct-DNA）的相互作用。结果表明，配合物为不可逆氧化还原过程，其荧光发射光谱为416nm，与小牛胸腺DNA（ct—DNA）以沟面结合方式相互作用，配合物结合常数Kbl=4．68×10^3L／mol。

若干大环铜(Ⅱ)、锰(Ⅱ)配合物模拟超氧化物歧化酶的研究

用核黄素光照法测定了,8种大环铜(Ⅱ)、锰(Ⅱ)配合物的超氧化物歧化酶活性(SOD),结果表明,它们在1×10-4-1×10-7mol/L的浓度范围内均有50%以上抑制率,锰(Ⅱ)配合物表现出较铜(Ⅱ)配合物更低的SOD活性,对各模型化合物活性和结构的关系进行了探讨。

双(4,5-二氮杂芴酮)缩对,对'-二氨基二苯甲烷桥联的二(邻菲咯啉合铜(Ⅱ))的合成及其与DNA作用的光谱研究

A new bimetallic Cu?complex, [(phen)Cu(μ bdmp)Cu(phen)](ClO4)4·2H2O, where phen and bdmp denote 1,10 phenanthroline and 1,1′ bis(nitrilomethylidyne 4,5 diazafluoren) 4,4′ (μ methylene)bisphenyl respectively was synthesized and its DNA binding behavior was studied by photophysical methods. It has been found that calf thymus DNA could result in significant decrease both in electronic absorption and fluorescent emission of the complex. The fluorescence quenching by ferrocyanide could be reduced to some extent for the complexin presence of DNA. These facts suggest that this dicopper?complex binds to double helix DNA by partial intercalation.

一个新型氰根桥联铁(Ⅲ)-铜(Ⅱ)大环配位聚合物的合成和晶体结构

合成了新型大环配位聚合物 [Cu(L) ]2 [Fe2 (H2 O) (CN) 10 ]·8H2 O(L =1,8-二正丙基- 1,3,6 ,8,10 ,13-六氮杂 - 14-冠 - 4 ) ,用元素分析、ICP分析、IR光谱对配合物进行了表征 ,X -射线衍射测定了其单晶结构 .结果表明 ,该晶体属正交晶系 ,Pddd空间群 ,a =1.8310 (4)nm ,b =2 .6 0 6 0 (5)nm ,c =3.16 80 (6 )nm ,α =β =γ =90° ,V =15.116 (5)nm3,Z =8,dc=1.0 85g/cm3,F(0 0 0 ) =52 0 0 ,R1=0 .10 2 4 ,WR2 =0 .2 6 57,GOF(F2 ) =0 .992 .该配合物结构中氰根桥联铁 (Ⅲ )和铜 (Ⅱ ) ,形成Fe -CN -Cu -NC -Fe一维链 ,链与链之间经由Fe-O(H2 O) -Fe而相互联结 ,形成相互交叉的网状结构 .铁和铜均形成 6配位畸变 8面体构型 .

具生物功能的二氧四胺大环金属配合物的研究 Ⅱ．Cu（Ⅱ），Ni（Ⅱ）配合物的电化学研究

用循环伏安法研究了四个ｎｐｄｔ和ｄｔ的铜（Ⅱ）和镍（Ⅱ）配合物在水溶液中的氧化还原过程，讨论了ｐＨ值对ｎｐｄｔ的铜（Ⅱ）、镍（Ⅱ）配合物的ＣＶ曲线的影响，并测定了两种铜（Ⅱ）配合物在电极表面的异相电子转移反应速率常数，二者的速率常数相近。

Cu(Ⅱ)大环希夫碱配合物的合成与表征

以邻苯二甲醛和邻苯二胺为原料,三水合硝酸铜为模板剂,用模板反应在无水乙醇中制备了一种新的固体配合物[CuL](NO_3)_2·6H_2O。通过元素分析、磁化率及摩尔电导测定、红外光谱和电子光谱分析、热重-差热分析等,确定了配合物的组成、立体结构与对称性,并对其电致变色机理进行了初步的探讨。