间苯二甲酰腙分子钳的合成及阴离子识别研究

设计合成了3种新型间苯二甲酰腙类化合物,利用UV-Vis及¹H NMR考察了其与F^-、Cl^-、Br^-、I^-、CH₃COO^-、HSO₄^-、H₂PO4-、ClO4-阴离子的相互作用。结果表明,主体分子4a(双对硝基苯并呋喃甲醛间苯二甲酰腙)在DMSO溶液中对F-和CH₃COO-有显著识别效果,溶液颜色由黄色变为深黄色和棕红色。通过¹H NMR滴定及质子溶剂效应进一步证明,主体分子与阴离子之间是以氢键作用方式相结合。Job曲线表明,主客体间形成1：1型氢键络合物。基于实验结果,探讨了主客体间形状和大小匹配对识别能力的影响以及主客体之间的识别模式。     

固态1,4-二-(4-羧基吡啶基)丁烷锰(Ⅱ)配位化合物中的二维互相穿插和三维互锁结构

利用1,4-二-(4-羧基吡啶基)丁烷(L)合成了两种锰的新配位化合物{[MnL2(H2O)4]·2H2O·2ClO4}n(1)和[MnL(H2O)3]·H2O·2Cl}n(2).单晶X-射线衍射结构分析表明,1是由氢键所连接而成的二维互相交织的结构,2呈现出二重互锁的三维结构.结果显示在固体中反离子形成氢键的能力对1和2的结构起关键作用.     

阴离子主导的手性Cu(II)配位聚合物:可逆的结构转换,圆二色谱和二次谐波响应

用手性的V形双齿配体N,N''-（（1R,2R）-1,2-二取代环己二胺）双（N-苯甲酸（3-吡啶亚甲基）酰胺（1R,2R）-3-bcpb）和不同的Cu(II)盐反应,组装成2个新的手性Cu(II)配位聚合物{[Cu（（1R,2R）-3-bcpb）]Cl₂}_n（1）和{[Cu（（1R,2R）-3-bcpb）₂]（ClO₄）₂·2H₂O·2CH₃OH}_n（2）。其中1是一维链状结构,2具有二维（4,4）网络拓扑。溶剂热条件下,在甲醇溶剂体系中,通过引入AgClO₄,1能转换成2,同时通过加入NaCl,2也能转换成1。圆二色谱和二次谐波响应测试验证了它们具有结构上的手性。     

2,3-二甲基吡嗪铜配位聚合物的合成与结构

利用2,3-二甲基吡嗪与硝酸铜及氯化铜合成了铜配位聚合物[Cu(Mepz)]2n+(Mepz=2,3-二甲基吡嗪),并通过单晶X射线衍射方法进行了表征.该晶体属于正交晶系,空间群为:Cmca,相关晶胞参数为:a=0.68617(11)nm,b=1.365 2(2)nm,c=1.953 3(3)nm,V=1.8297(5)nm3.该配位聚合物中的Cu原子与2个N原子、2个O原子和2个Cl原子配位,形成了一个稍微畸变的配位八面体,每相邻的2个配体之间通过Cu离子与吡嗪环上的2个N原子配位连接成无限延伸的一维链状结构,并通过分子间的氢键作用进一步将其连接成为二维的超分子网络结构.     

1,2,4-苯三甲酸铜二维网状配合物的合成及结构表征(英)

在室温下,MnSO₄·H₂O和1,2,4-苯三甲酸(H₃BTC)反应得到化合物[Mn(H₂BTC)₂(H₂O)₄]·2H₂O (1),化合物1和CuSO₄·5H₂O反应得到化合物[Cu(HBTC)(H₂O)_1.5]·H₂O (2)。化合物1是一个单核分子化合物。在化合物1中,每个锰离子和两个H₂BTC^－离子及四个水分子配位。化合物2中,每个铜离子和三个HBTC^2－及两个水分子配位,其中的一个水分子起桥联作用从而形成二维网状结构。     

1，3-二羟基丙酮衍生物的合成

以五氧化二磷为引发剂，二甲亚砜氧化1，3-二芳氧基(烷氧基)-2-丙醇化合物合成了一系列1，3-二羟基丙酮衍生物．通过IR和^H NMR对化合物进行了表征．     

以阴离子交换纤维素膜作基质室温燐光法测定痕量2,6-二氨基嘌呤的研究

本文对2,6-二氨基嘌呤(DAP)在不同的基质上和不同的重原子微扰剂存在下的室温燐光(RTP)强度进行比较,结果表明,NaI-NaAc是有效的重原子体系。适宜的固体基质为阴离子交换纤维素(二乙氨基乙基纤维素)膜(DEAE)和慢速定量滤纸。前者对酸度的变化具有较好的缓冲能力,本文提出了以DEAE为固体基质,测定痕量DAP的RTP法。     

1，2-二[3-（6，8-二叔丁基-3，4-二氢-1，3-苯并噁嗪）基]乙烷的合成及晶体结构

N-取代的3，4-二氢-1，3-苯并噁嗪具有生物活性，是潜在的安定剂和镇静剂，还是制备酚醛树脂的潜在中间体。一般以酚、伯胺和甲醛为原料，通过Mannish缩合反应来制备。本文通过2，4-二叔丁基苯酚、乙二胺和甲醛反应，合成了亚乙基桥联的双噁嗪，X-射线单晶衍射测定了它的晶体结构。     

显色剂2-苯并噻唑偶氮-7-(4-甲氧基苯偶氮)-1,8-二羟基萘-3,6-二磺酸的合成及与铁(Ⅲ)显色反应研究

合成了一种新的杂环不对称双偶氮变色酸试剂2 苯并噻唑偶氮 7 (4 甲氧基苯偶氮) 1,8 二羟基萘 3,6 二磺酸(简称BTAMOPACA)。研究了试剂的结构和光度性质,结果表明,在pH6.0的邻苯二甲酸氢钾 氢氧化钠缓冲介质中,铁(Ⅲ)与BTAMOPACA及CTMAB形成1∶2∶1的三元配合物,其最大吸收波长为690nm,表观摩尔吸光系数ε=1.19×105L·mol-1·cm-1,在0～5μg/25ml范围内符合比耳定律,建立了测定石灰石和高炉渣中铁的方法,结果满意。     

A Two-coordinate Copper(I) Complex Constructed from Cyanuric acid and 4,4′-bipyridyl: Synthesis, Structure and Photoluminescence

A two-coordinate copper（Ⅰ） complex, Cu2（bipy）（H2L）2 （1） （H3L=cyanuric acid, bipy=4,4＇-bipyridyl）, which exhibits strong photoluminescence, has been synthesized under hydrothermal conditions and structurally characterized by single crystal X-ray diffraction. The compound crystallizes in the monoclinic space group P21/n, with cell parameters： Mr= 539.42, a= 13.4806（5）A↑°, b=4.5234（2） A↑°, c= 15.4952（8）A↑°,β = 105.526（3）°, V=910.39（7）A↑°^3, Z=2 and μ=3.52 mm^ -1. In the structure the two Cu（Ⅰ） ions are bridged by bipy to form a two-coordinate copper（Ⅰ） dimer. The adjacent dimer units are connected by hydrogen bonding interactions, resulting in 1D zigzag chains along the c axis. 1 emits intense yellow light when excited with UV light.     

CuI‐catalyzed homocoupling of terminal alkynes to 1,3‐diynes

A simple and efficient protocol for CuI‐catalyzed oxidative homocoupling reaction of terminal alkynes to symmetrical 1,4‐disubstituted 1,3‐diynes was reported. The reaction can be carried out in the open air, using NaOAc as a base in the absence of any other additives. A variety of terminal alkynes were converted to the corresponding 1.3‐diynes in good to excellent yields without any side product formation. Copyright © 2010 John Wiley & Sons, Ltd.     

Synthesis,Antibacterial Activities and Nuclease Properties of Ternary Copper(II) Complex Containing 2‐(2′‐Pyridyl)benzothiazole and Glycinate

A new ternary complex [Cu(PBT)(Gly)(H₂O)]ClO₄ (PBT=2‐(2′‐pyridyl)benzothiazole, and Gly=glycinate) has been synthesized and characterized by elemental analysis, molar conductivity, and IR methods. The complex, structurally characterized by single‐crystal X‐ray crystallography, shows a slightly distorted square‐pyramidal coordination geometry in which two nitrogen atoms of PBT and the carboxylate oxygen atom O and the amino nitrogen atom N of Gly bind at the basal plane, a water molecule is coordinated at the apical position. The complex, Cu(ClO₄)₂ and free PBT were each tested for their ability to inhibit the growth of two Gram(?) (Escherichia coil, Salmonella) and two Gram(+) (Bacillus subtilis, Staphylococcus aureus) microorganisms. The complex showed good antibacterial activities against the microorganisms compared with free PBT and Cu(ClO₄)₂. The interaction between the complex and calf thymus DNA in aqueous solution was investigated using electronic spectroscopy, fluorescence spectroscopy, circular dichroic spectroscopy, and viscosity measurements. Results suggest that the complex could bind to DNA by an intercalative mode. In addition, the result of agarose gel electrophoresis showed that the complex can cleave the plasmid DNA by hydroxyl radicals and singlet oxygen‐like species under the condition of physiological pH and room temperature.     

Synthesis and characterization of three dinuclear copper(I) complexes of 1,2‐bis(diphenylphosphino)‐1,2‐dicarba‐closo‐dodecaborane

Three dinuclear copper(I) complexes, [Cu₂(µ‐Cl)₂(1,2‐(PPh₂)₂‐1,2‐C₂B₁₀H₁₀)₂]·2CH₂Cl₂ ( 1 ), [Cu₂(µ‐Br)₂(1,2‐(PPh₂)₂‐1,2‐C₂B₁₀H₁₀)₂]·2THF ( 2 ) and {Cu₂(µ‐I)₂[1,2‐(PPh₂)₂‐1,2‐C₂B₁₀H₁₀]₂} ( 3 ) have been synthesized by the reactions of CuX (X = Cl, Br and I) with the closo ligand 1,2‐(PPh₂)₂‐1,2‐C₂B₁₀H₁₀. All these complexes were characterized by elemental analysis, FT‐IR, ¹H and ¹³C NMR spectroscopy and X‐ray structure determination. Single crystal X‐ray structure determinations show that every complex contained di‐µ‐X‐bridged structure involving a crossed parallelogram plane formed by two Cu atoms and two X atoms (X = Cl, Br, I). The geometry at the Cu atom was a distorted tetrahedron, in which two positions were occupied by two P atoms of the PPh₂ groups connected to the two C atoms of carborane (Cc), and the other two resulted from two X atoms which bridged the other Cu atom at the same time. To the best of our knowledge, this is the first example of copper(I) complexes with 1,2‐diphenylphosphino‐1,2‐dicarba‐closo‐dodecaborane as ligand characterized by X‐ray diffraction. The catalytic property of the complex 3 for the amination of iodobenzene with aniline was also investigated. Copyright © 2005 John Wiley & Sons, Ltd.     

Synthesis,characterization and 1,3‐butadiene polymerization behaviors of cobalt complexes bearing 2‐pyrazolyl‐substituted 1,10‐phenanthroline ligands

A series of cobalt(II) complexes containing tridentate 2‐pyrazolyl‐substituted 1,10‐phenanthroline ligands (L) with the general formula [LCoCl₂] have been successfully synthesized and fully identified by IR spectroscopy, elemental analysis and mass spectroscopy. Cobalt complexes Co4–Co8 were further confirmed by X‐ray crystallographic analysis, and all the complexes adopted distorted trigonal pyramid geometries around the cobalt center. In combination with methylaluminoxane, the complexes exhibit high cis‐1,4‐selectivity for 1,3‐butadiene polymerization. The catalytic activities of the complexes mainly depend on the nature of the substituent and its position at the pyrazolyl ring of the ligand. Complexes having a bulkier substituent on the pyrazolyl ring of the ligand show lower catalytic activity and the incorporation of electron‐withdrawing substituent enhances the activity. Polymerization behaviors were almost not affected with varying [Al]/[Co] ratio, but both activity and the cis‐1,4 content decrease slightly as polymerization temperature increasing. Copyright © 2013 John Wiley & Sons, Ltd.     

A New Copper(I) Complex Based on Imidazole and Triphenylphosphine Ligands: Synthesis,Structure, Third‐Order NLO,and Fluorescence Properties

A new candidate [Cu(PPh₃)₂Him]Br ( 1 , PPh₃=triphenylphosphine, Him=1‐H‐imidazole) for nonlinear optical (NLO) materials has been synthesized and characterized crystallographically. The third‐order NLO optical properties were measured by the Z‐scan technique with an 8 ns pulsed laser at 532 nm. Compound 1 exhibits strong NLO absorptive abilities [α₂=(61±5)×10^?12] and effective self‐focusing performance [n₂=(15±3)×10^?18 m²·W^?1] in 1.01×10^?4 mol·dm^?3 DMF solution. The compound also exhibits luminescence in DMF solution at room temperature and shows narrow emission with maximum at 382 nm. The electronic structure and photoluminescent process were investigated by means of TD‐DFT calculations. The results suggest that the contribution to the frontier orbitals from the Cu? Br δ bond plays a crucial role in its linear optical properties, and the origin of luminescence is attributable to the π??→n transitions.     

Recyclable Porous Polymer‐Supported Copper Catalysts for Glaser and Huisgen 1,3‐Diolar Cycloaddition Reactions

A family of polymer‐attached phenanthrolines was prepared from solvothermal copolymerization of divinylbenzene with N‐(1,10‐phenanthroline‐5‐yl)acrylamide in different ratios. The polymer‐supported copper catalysts were obtained through typical impregnation with copper(II) salts. The polymers and supported copper catalysts have been characterized by N₂ adsortion, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermogravimetric analysis (TG); they exhibit a high surface area, hierarchical porosity, large pore volume, and high thermal and chemical stabilities. The copper catalyst has proved to be highly active for Glaser homocoupling of alkynes and Huisgen 1,3‐diolar cycloaddition of alkynes with benzyl azide under mild conditions at low catalyst loading. The heterogeneous copper catalyst is more active than commonly used homogeneous and nonporous polystyrene‐supported copper catalysts. In particular, the catalyst is easily recovered and can be recycled at least ten times without any obvious loss in catalytic activity. Metal leaching was prevented due to the strong binding ability of phenanthroline and products were not contaminated with copper, as determined by ICP analysis.     

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.     

Preparation and Molecular Structure of Binuclear Nickel (I) Complex Bridged by 1,2,4, 5‐Benzenetetracarboxylato Tetravalent Anion

The title complex [(H₂O)₂(IMI)₃Ni(TCB)Ni(IMI)₃‐(H₂O)₂] H₂O (TCB = 1,2,4,5‐benzenetetracarboxylato te‐travalent anion; IMI = imidazole) has been prepared by the reaction of Ni(IMI)₃(Ac)₂ and TCB in aqueous solution. The crystal structure has been determined by single‐crystal X‐ray diffraction method. It crystallizes in the monoclinic system, space group P2₁/c(# 14), a = 1.2714(4) nm, b = 0.9411 (3) nm, c = 1.5869(4) nm, β= 108.54(2)°, V= 1.8001(9) nm³, Z = 2. The main feature of the crystal structure is a symmetric binuclear unit made up of two slightly distorted coordination octahedrons, which are bridged by TCB in monodentate fashion to each metal ion. Moreover three nitrogen atoms from three imidazoles, three oxygen atoms from two water molecules and one carboxylate group of TCB coordinated to a nickel (I) ion are found on a face of the octahedron respectively, so the octahedron is a facial isomer.