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1.
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。  相似文献   

2.
抗肿瘤铂配合物的研究进展   总被引:4,自引:2,他引:4       下载免费PDF全文
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。  相似文献   

3.
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  相似文献   

4.
信息存储的分子材料——自旋转换配合物   总被引:3,自引:0,他引:3  
从化学角度综述了一类具有信息存储功能的分子材料———自旋转换配合物。介绍了配合物的自旋转换现象;自旋转换配合物的表征;自旋转换配合物用于信息存储器件应具备的条件及实用自旋转换配合物的研制近况及展望。  相似文献   

5.
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。  相似文献   

6.
童叶翔  康北笙 《电化学》1999,5(4):361-370
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。  相似文献   

7.
岳蕾  周荫庄 《化学进展》2009,21(10):2093-2099
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。  相似文献   

8.
金属配位化合物溶液的电化学研究   总被引:5,自引:0,他引:5  
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  相似文献   

9.
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.  相似文献   

10.
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。  相似文献   

11.
The lipids of the kernels of ripe cotton seeds of varieties resistant and susceptible to verticillium wilt have been determined. Intra- and intervariety changes in these indices for the infected plants have been revealed. Different directions of the post-infection changes in the lipids according to the degree of resistance of the variety to wilt have been shown. Differences have been observed both in healthy and in infected plants.  相似文献   

12.
Four imidazoline derivatives: antazoline (AN), naphazoline (NN), tymazoline (TM), xylometazoline (XM), in the form of hydrochlorides in solid phase have been subjected to high energy e-beam irradiation from an accelerator (~10 MeV) at a dose varied from 25 to 200 kGy. The effects of the irradiation have been assessed by DSC, X-ray diffraction, FTIR, EPR and TLC. The standard sterilisation dose of 25 kGy has been found to produce changes in the properties of one derivative (XM), two other ones (AN and TM) have been found sensitive to doses >100 kGy, whereas NN has been resistant to irradiation in the whole range studied (25–200 kGy). EPR results indicated that the changes taking place in the therapeutic substances studied are related to radical formation. The irradiation induced changes in colour, a decrease or increase in the melting point, changes in the XRD pattern, small changes in the shape of FTIR peaks and the presence of radiolysis products. The XM compounds cannot be sterilised by irradiation because of the radiation induced changes in its physico-chemical properties.  相似文献   

13.
A model polyether-urethane with monodisperse N-alkyl polyurethane hard segment has been investigated by differential scanning calorimetry, dielectric spectroscopy and infrared spectroscopy. The temperature dependent changes in the enthalpic and dielectric properties have been correlated with specific molecular motions and transition processes in the hard and soft phase. The orientation of the hard and soft segments under uniaxial stress changes with the strain and mechanisms for the orientation and deformation behaviour have been proposed. Effects of the thermal history of the sample on the properties have been discussed as well.  相似文献   

14.
Various diphenylmethane diisocyanate-containing polyurethanes whose soft blocks differ in polarity and crystallizability have been investigated using deformation and scanning calorimetry to ascertain the contribution of different types of intermolecular interaction to elasticity of polyurethane elastomers. The phase composition of polyurethanes being investigated and its dependence on mechanical action have been analyzed on the basis of scanning calorimetry data. By measuring the mechanical work and thermal effect during extension (λ=1–3.5) deformation dependences of internal energy changes and the ratio of energy and entropy changes have been determined as well as energy contributions have been calculated. The data obtained for different temperatures demonstrate that a decrease in the fraction of energy changes is largely due to hard block structurization in the course of re-building the network of hydrogen bonds during deformation.  相似文献   

15.
Fourier transform infrared spectra have been obtained for polyethylene irradiated in oxygen and nitrogen atmospheres. The spectra before and after irradiation have been compared by digital subtraction. The difference spectra are indicative of changes caused by irradiation. Crosslinking and chain scission reactions produce the observed changes.  相似文献   

16.
The thermal curves and the enthalpy changes of the interaction between some oral sustained release preparations (Contac, Fenbid and Benza sustained release capsules) and physiological saline have been measured at 298.15 K with a MS-80 standard Calvet microcalorimeter. The curves that recorded the changes of heat effect with time have clearly shown the sustained release action and process of the above preparations. A method for examining the sustained release action of sustained release preparations can be developed from the above experiments. The principle of application and the experimental procedure of this method have been expounded, and some results of the above experiments have also been discussed.  相似文献   

17.
The Polarized lower-frequency infrared spectra (800–33 cm-1) of nylon 66 (α form), nylon 77 (γ form), and nylon 6 (both α and γ form) have been examined. The spectral changes which occur on complex formation of the polyamides with iodine-potassium iodide solution and on subsequent iodine desorption have been studied in relation to the changes in the polymer structures. On the basis of these results, most of the stronger bands have been reasonably assigned to the vibrations characteristic of the amide group and the methylene chain of the polyamides, and some new structure–frequency correlations have been established for the polymers.  相似文献   

18.
19.
Extraction coefficients for all lanthanides have been determined in two systems: 0.2M TBP-3M NaNCS, and 3.6M TBP-0.2M NaNCS. The data have been used for the calculation of relative changes in thermodynamic functions accompanying the investigated extraction process. The compensation of enthalpy and entropy changes is found as a result of dehydration of the lanthanide aquaions.  相似文献   

20.
Experiments show changes in the carbon-oxygen bond lengths when a carboxylic acid dimerizes. To see how these changes are depicted in the electronic structure, a series of ab initio calculations have been made on monomeric and dimeric formic acid. Both systems have been examined through energy optimalization and through a Mulliken population analysis.The experimental changes can be qualitatively explained by the calculations, however, the quantitative agreement is not as good as desired.The calculations on monomeric formic acid give valuable information on the possibility of separately computing the different structural parameters.  相似文献   

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