本文用荧光光谱法初步研究了卟啉与金属离子配位反应机理和部分催化剂的催化机理。
The present paper covers the mechanism of coordination reaction of porphyrins with some metal ions studied by fluorometry and the catalytic mechanism of some catalysts.
主要原因可能是形成配合物后电子由配体流向配位的中心阳离子，增加了电子的转移能力。
Thus could be resulted from the complexation by which increases the electron density of the metal ion through partial sharing of its positive charge with donor groups.
这与大量的理论研究——一个主要的四面体配位结构是2或3左右，取决于离子对的流动率的溶剂化数是相悖的。
This contradicts numerous theoretical studies which indicated a primarily tetrahedral coordination structure with a solvation number near 2 or 3, depending on the prevalence of ion pairing.
用稀土金属离子通过形成配位结合来固着丝胶，制备了不同增重率的丝纤维，研究了增重丝纤维结构变化。
The structure changes of silk fiber with different weight gain, by using sericin fixing agent containing rare earth metal ion, were studied in this paper.
而要形成螯合物其中有一个因素非常重要，就是金属离子周围必须有足够的原子与它产生配位。
One of the important factors to form chelate is there should be enough atoms to coordinate with metal ion.
此类化合物具有近似三角架形结构，能产生荧光，可以与稀土离子进行选择性配位。
These compounds have tripodal structure, can produce strong fluorescence and can coordinate selectively with rare earth ions.
考察了烷氧基链长、配位金属离子和分子空间结构对液晶性能的影响。
The effects of alkoxy chains, metal ions of complexes and molecular space structure on liquid crystal properties have been investigated.
当增大金属离子与血清白蛋白的浓度比时，也发生类似的配位中心构型变化。
When the concentration of the serum albumin was fixed and the ratio of metal ions to serum albumin increased, there exists similar configuration of the coordination center.
同中心离子连接的配位体，数目称为配位数。
The number of ligands attached to the central ion is called the coordination number.
通过碱金属离子与聚氧化乙烯（PEO）的络合配位制备了不同比例的PEO聚电解质，将PEO聚电解质与尼龙6熔融共混挤出，制备抗静电尼龙6复合材料；
Nylon 6/Polyethylene oxide (PEO) polyelectrolyte composites with different molar ratio of alkali metal ion and PEO polymer unit were prepared by means of complexation reaction.
一种配位(络合)化合物，其中的金属离子与氮、碳或氧等非金属原子结合生成有配位共价键的杂环。
An organic coordination (complexing) compound in which the metal ion is bound to atoms of nonmetals, e. g. nitrogen, carbon, or oxygen, to form a heterocyclic ring having coordinate covalent bonds.
稀土离子位于双硅酸根和八面体层之间，形成（8+3 ）配位的A（1）多面体和10配位的A（ 2 ）多面体。
The rare earth ions lie between the disilicate groups and the sheets of octahedra to form (8+3)-coordinated A(1)-polyhedra and 10-coordinated A(2)-polyhedra.
结果表明金属离子与其中的葡萄糖基、羟基、羧基、胺基等配位基发生了配位反应。
Results indicate the metal ions have coordinated with thereinto glucose, hydroxy, carboxyl, amidocyanogen etc.
这种规律性的变化可由石榴石晶格中处于八次配位时不同阳离子的配位半径不同作出解释。
This change can be explained by different cation radiuses in the octahedral coordination site of garnet lattice.
通过上述晶体结构中配位键长键角的分析，得到了一个行之有效的标准，判断羧基与中心金属离子是单齿配位还是螯合配位。
A new criterion to decide whether the carboxy group coordinating to the metallic ion in mono or bi dentate-fashion in an ambiguous situation, base on coordination bond distances and angles.
从金属络合吸收剂的结构出发，分析了铁、钴等金属中心离子和氨基羧酸类或巯基类配体的配位化学；
Starting from the metal complexes solution structures, this paper analysizes the ligand chemistry of metal centers such as iron and cobalt and binding of aminocarboxylate and thiochelate complexes.
获得了高离子电导率的固体电解质，其由一种含有锆酸化合物、聚乙烯醇和水的配位化合物组成。
The high ion conductive solid electrolyte is obtained which is composed of the complex compound having zirconic acid compound, polyvinyl alcohol, and water.
研究发现，这些配合物的中心离子都采用了六配位，形成了八面体构型。
The study found that the central ion of these complexes have adopted the six-coordinated, forming octahedral geometry.
所有的K离子均同时与酚羟基和硝基的氧原子配位。
All K atoms coordinate with o atoms of phenolic hydroxyl group and nitro-group simultaneously.
吡啶脲类配体因其既能够与过渡金属配位，又能与阴离子形成氢键作用，近年来备受化学家的关注。
Urea-based pyridyl ligands have drawn much attention in recent years due to their capacity of coordinating with metal ions by the pyridyl group and binding anions by the urea functionalities.
镍离子与两个丁二酮肟配体上的四个氮原子和两个甲酸根离子上的碳原子配位进而形成八面体配位环境。
The Ni(II) cation has a distorted octahedral geometry defined by five N atoms from two dimethylglyoxime molecules and two O atoms from two formate anions.
随着温度升高，溶液的结构发生了变化，离子的缔合度增加，内层配位水的数目减少，出现了离子的多核簇组成。
With the increasing of temperature, the degree of ion associate increases, the number of water nearest the ion decreases, and the multinuclear ions structure appears.
按照已有的酶活性中心的金属-氨基酸侧链配位和空间关系，设计合成多齿配体，并使配体和金属离子通过配位作用形成配合物。
They are designed according to the special relations and coordination of metal-amino acid side chain in the active centre in known enzymes.
其中，配合物1和2是以镉为中心离子的八配位四方反棱柱构型；3-5属于异质同晶体，呈现一维链结构。
The complexes 1 and 2 have formed the distorted square antiprism geometry with Cd ions as the central ions. 3-5 are isostructural with 1D chain structure.
构筑配位聚合物时首先要考虑配体的几何构型和金属离子的配位倾向性。
The geometric configuration of ligand and the coordination tendency of metal cation should be considered when constructing the coordination polymers.
从聚合物的结构表征及机理探讨表明：颜色突变后，体系产生了新的活性中心，催化机理发生了转变——由配位机理转变为阳离子机理。
Structure characterization and mechanism study showed that, after the color change, new active center formed and polymerization changed from coordination to cationic mechanism.
高离子电导率的固体电解质由一种含水的配位化合物组成，该配位化合物含有锆酸化合物和聚乙烯醇。
The high ion conductive solid electrolyte is composed of a complex compound including water that has zirconic acid compound and polyvinyl alcohol.
因为神经递质和受体结合（配位）启动了这些离子通道， 所以他们被称为配位门通道，以区别于电压门通道。
Because the binding of the neurotransmitter (ligand) to the receptor activates these ion channels, they are called ligand-gated channels to distinguish them from voltage-gated channels.
因为神经递质和受体结合（配位）启动了这些离子通道， 所以他们被称为配位门通道，以区别于电压门通道。
Because the binding of the neurotransmitter (ligand) to the receptor activates these ion channels, they are called ligand-gated channels to distinguish them from voltage-gated channels.
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