《多酸基功能配合物》

本书共分为8章,主要按照多酸的结构类型将配合物划分为八大类:Keggin型多酸基功能配合物、Wells-Dawson型多酸基功能配合物、Lindqvist型多酸基功能配合物、Anderson型多酸基功能配合物、多钼酸盐基功能配合物、多钨酸盐基功能配合物、多钒酸盐基功能配合物、P2Mo5和P4Mo6基功能配合物。比较系统地介绍了每种多酸基功能配合物的结构特点和合成方法,总结了合成规律,并有选择性地介绍了各类多酸基功能配合物的一些代表性性质。     

抗肿瘤铂配合物的研究进展

综述了30年来抗肿瘤铂配合物的研究进展,重点介绍了违背原有构效关系的铂的新型配合物的设计思想及研究情况,包括铂(Ⅳ)配合物、反式铂配合物、铂高分子配合物等。     

多酸基功能配合物

正本书共分为8章,主要按照多酸的结构类型将配合物划分为八大类:Keggin型多酸基功能配合物、Wells-Dawson型多酸基功能配合物、Lindqvist型多酸基功能配合物、Anderson型多酸基功能配合物、多钼酸盐基功能配合物、多钨酸盐基功能配合物、多钒酸盐基功能配合物、P2Mo5和P4Mo6基功能配合物。比较系统地介绍了每种多酸基功能配合物的结构特点和合成方法,总结     

萘酞菁类配合物的气敏特性

在阐述了萘酞菁配合物的结构特点和气敏机理的基础上,讨论了影响萘酞菁配合物气敏性的主要因素,介绍了近年来萘酞菁配合物气敏物特性研究的最新进展,并对萘酞菁配合物作为气敏材料的发展趋势进行了展望。     

金属配位化合物溶液的电化学研究所

在已有的研究基础上,综述了近年来金属配位化合物溶液的电化学研究。内容包括：采用多种电化学方法研究金属配合物、簇状化合物溶液的电化学,配合物氧化还原电对的标准电极电位及有关的平衡常数,配合物的电极反应动力学及其与结构性能的关系,配合物的电催化作用,配合物的电合成,探讨配合物电极反应机理,测定多种电化学参数,提供了许多关于配合物性质、结构和功能的重要信息。     

金属配位化合物溶液的电化学研究

在已有的研究基础上,综述了近年来金属配位化合物溶液的电化学研究．内容包括：采用多种电化学方法研究金属配合物、簇状化合物溶液的电化学,配合物氧化还原电对的标准电极电位及有关的平衡常数,配合物的电极反应动力学及其与结构性能的关系,配合物的电催化作用,配合物的电合成．探讨配合物电极反应机理,测定多种电化学参数,提供了许多关于配合物性质、结构和功能的重要信息     

非经典铂类抗肿瘤药物研究

本文综述了非经典铂类抗肿瘤药物的发展概况,介绍了具有口服活性的铂(Ⅳ)配合物,具有空间位阻的铂(Ⅱ)配合物,反式铂(Ⅱ、Ⅳ)配合物,多核铂(Ⅱ)配合物和含有铂-硫键的铂(Ⅱ)配合物,并总结了这几类新型铂配合物的抗肿瘤机理,克服顺铂的耐药性机理及其临床进展。     

配位化合物[Cd（hca）2（H2O）3]（H2O）2,[Cu（hca）2（phen）]的合成与表征

配合物1由醋酸镉和Nahca(对羟基肉桂酸钠)在水溶液中反应得到,配合物2由醋酸铜,Hhca和phen在水和乙醇混合溶液中反应得到.配合物1属正交晶系,Pbcn空间群.配合物2属单斜晶系,C2/c空间群.配合物1和2中配体中的羧酸根与金属离子都是螯合配位的,末端羟基没有参与配位.配合物1和2的结构中都包含了丰富的氢键.通过氢键作用,配合物1形成了三维网状超分子结构,配合物2形成了二维层状超分子结构.     

Co（Ⅱ）和Co（Ⅲ）配合物与C—C的反应性研究

从二炔丙基胺（１）出发,用二氯化钴和三苯膦经二（三苯膦）氯合然合成了戊二烯Ⅱ）配合物（８）;用改进方法,八羰基二钴经多核然配合物１０合成了双钴（Ⅱ）配合物１１．分别考察了这两种不同价态的钴环配合物对富马酸二乙酯的反应活性,配合物８与活性烯烃２反应产生新的稳定的配合物９,配合物１１则生成有机化合物３,根据配合物８的Ｘ射线晶体结构解释了Ｃｏ（Ⅲ）对活性烯烃的反应活性。     

具有切割DNA活性的铬配合物*

铬配合物切割DNA的活性在医学、药学及生物学领域引起了广泛关注。本文综述了具有切割DNA活性的铬配合物的研究进展,介绍了不同价态铬的多种配位模式配合物切割DNA的活性,总结了铬配合物切割DNA的作用机理,展望了不同价态铬配合物的研究和发展方向。     

Ion selectivity of crown ethers investigated by UV and IR spectroscopy in a cold ion trap

Electronic and vibrational spectra of benzo-15-crown-5 (B15C5) and benzo-18-crown-6 (B18C6) complexes with alkali metal ions, M(+)?B15C5 and M(+)?B18C6 (M = Li, Na, K, Rb, and Cs), are measured using UV photodissociation (UVPD) and IR-UV double resonance spectroscopy in a cold, 22-pole ion trap. We determine the structure of conformers with the aid of density functional theory calculations. In the Na(+)?B15C5 and K(+)?B18C6 complexes, the crown ethers open the most and hold the metal ions at the center of the ether ring, demonstrating an optimum matching in size between the cavity of the crown ethers and the metal ions. For smaller ions, the crown ethers deform the ether ring to decrease the distance and increase the interaction between the metal ions and oxygen atoms; the metal ions are completely surrounded by the ether ring. In the case of larger ions, the metal ions are too large to enter the crown cavity and are positioned on it, leaving one of its sides open for further solvation. Thermochemistry data calculated on the basis of the stable conformers of the complexes suggest that the ion selectivity of crown ethers is controlled primarily by the enthalpy change for the complex formation in solution, which depends strongly on the complex structure.     

冠醚配合物的研究XV．若干席夫碱及仲胺型双冠醚和碱金属离子的配位反应

本文运用微量电导滴定及计算机拟合技术，研究了若干席夫碱及仲胺型双冠醚和减金属离子的配位反应，测定了配合物的组成及稳定常数，并对实验结果进行了讨论．     

冠醚配合物的研究XV.若干席夫碱及仲胺型双冠醚和碱金属离子的配位反应

本文运用微量电导滴定及计算机拟合技术，研究了若干席夫碱及仲胺型双冠醚和碱金属离子的配位反应，测定了配合物的组成及稳定常数，并对实验结果进行了讨论。     

Potentiometric and AM1d studies of the equilibria between silver(I) and diaza-15-crown and diaza-18-crown ethers with nitrogen in different positions in various solvents

Abstract

Complex formation and stability constants between typical and atypical diaza-15-crown and diaza-18-crown ethers with silver(I) were determined in methanol, acetonitrile and propylene carbonate by the potentiometric method. In two of the diaza crown ethers, AA-diaza-15 and AA-diaza-18-crown, two nitrogens in the macrocyclic ring replaced two consecutive oxygens instead of two opposite ones in the two other diaza crown ethers. It was found that complexes of 1:1 and 1:2 metal-to-ligand stoichiometry were formed. The solvent composition and cavity size of crown ethers significantly influences the stability constants of complexes. AA-diaza-15 and AA-diaza-18-crown ethers were examined for comparison with diaza-15-crown and diaza-18-crown ethers. AA-diaza crown ethers formed less stable 1:1 metal-to-ligand complexes with silver(I) than typical diaza crown ethers but their ability to form 1:2 metal-to-ligand complexes was stronger. The energetically most favorable structures of the 1:1 metal-to-ligand complexes were calculated and visualized by the AM1d method at the semiempirical level of theory.     

Komplexierungseigenschaften von Pyridinokronenethern gegenüber Alkali- und Erdalkaliionen in Methanol

Complexing Properties of Pyridino Crown Ether with Alkali and Alkali-Earth Cations in Methanol The stability constants and thermodynamic values of the complex formation of several pyridino crown ethers with alkali and alkaline-earth cations were determined by calorimetric titration in methanol. The stability of the complexes is lower than with crown ethers. This is mainly caused by a decrease of reaction enthalpies. Compared with other mono substituted crown ethers the complexes with pyridino crown ethers are fare more stable due to entropic effects. With increasing cavity size the stability constants, enthalpies and entropies for the reaction of crown ethers and pyridino crown ethers approach similar values.     

Study on Molecular Recognition of Crown Ethers to Aniline and Monosaccharides

1 INTRODUCTION Chemical systems can store information on supra-molecular structures in a comparative way on diffe-rent states of chemical species in a numerical way.Davis[1] reviewed non-covalent weak interaction be-tween biomimetic hosts and carbohydrates. Inouye[2]synthesized macrocyclic polypyridine and observedits molecular recognition to ribose and monosacc-harides. Furuta[3] indicated that crown ethers can ex-tract AMP. Kobayashi[4] investigated 1:1 host-guestcomplexes of crown et…     

Spectroscopic studies of complex compounds derived from the tribochemistry reactions of KBr and HgX2(Cl, Br, I, CN) with crown ethers (DC18C6 and DB18C6)

Several new K and Hg(II) complexes derived from crown ethers (DC18C6, DB18C6) have been prepared by tribochemistry reactions. The isolated solid complexes have been characterized by I.R. spectral measurements. The isolated solid complexes are compared with the corresponding metal complexes prepared in solution. Also, the IR and NMR spectra of the solid complexes have been used to determine the strength of bond between Hg(II) ion and the crown ether.     

Collision-activated dissociation mass spectra of crown ethers,perfluorinated crown ethers and related macrocycles

The collision-activated dissociation (CAD) mass spectra for a series of crown ethers, perfluoro crown ethers, cryptands and several dicyclohexano substituted crown ethers are reported. The CAD spectra were acquired with a triple quadrupole mass spectrometer, and in some cases spectra were recorded as a function of collision energy. In general, the protonated crown ethers dissociate via a series of losses of C₂H₄O units. The perfluoro crown ethers dissociate predominantly via losses of C₂F₄O units. The dicyclohexano ethers fragment in analogous ways in conjunction with cleavage of the cyclohexano rings. CAD spectra are also reported for acyclic ether systems.     

Conductance studies of salt solutions in the presence of poly(vinylbenzo crown ethers)

The conductance of acetone and methyl ethyl ketone solutions of tetraphenylborate salts in the presence of homopolymers and styrene copolymers of vinylbenzo-15-crown-5 and vinylbenzo-18-crown-6 was studied, and the results compared with data obtained for crown ethers. Polycations are formed on binding cations to the poly(crown ethers), and the conductance behavior of the polyelectrolytes depends on the nature of the cation-crown complex and the spacing between crown moieties which in turn determines the charge density on the polymer chain. The compositions of the crown-cation complexes were determined for crown ethers. The complex formation constants of sodium and potassium cations to poly(vinylbenzo-18-crown-6) were found to change as more cations bind to the chain. This is not the case for the copolymers where the crown ligands are spaced farther apart. A mixture of poly(vinylbenzo-15-crown-5) and 10^?3M potassium tetraphenylborate in methyl ethyl ketone or acetone has a minimum conductance at a crown to cation ratio of 3.0, but the conductance rapidly increases on addition of crown ether. This was used to qualitatively determine the binding efficiency of a series of crown ethers since the rate of increase in the conductance is a measure of the binding ability of the crown ether to the cation.     

DFT Study for a Series of Less-Symmetrical Crown Ethers and Their Complexes with Alkali Metal Cations

A series of ring‐contracted (14‐crown‐5, 17‐crown‐6) and ring‐enlarged (16‐crown‐5, 17‐crown‐5, 19‐crown‐6, 20‐crown‐6) crown ethers and their complexes with alkali‐metal cations Na⁺ and K⁺ had been explored using density functional theory (DFT) at B3LYP/6‐31G* level in order to reveal the effects of the methylene‐chain length in a crown ether. The nucleophilicity of all crown ethers had been investigated by the Fukui functions. The quantum chemistry parameters, such as the energy gap (ΔE), the highest occupied molecular orbital energy (E_HOMO) and the lowest unoccupied molecular orbital energy (E_LUMO) for less‐symmetrical crown ethers and symmetrical frameworks (15‐crown‐5, 18‐crown‐6) had been calculated. In addition, the thermodynamic energies of complexation reactions had also been studied. The results of the DFT calculations show that the methylene‐chain length plays an important role in determining the structure characters of the crown ethers and also strongly influences the properties of the ethers. Some of the calculated results are in a good agreement with the experimental values.