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Two qina ligands chelate a cobalt ion by 0 and N atoms and two DMSO ligands coordinate a cobalt ion by two O atoms at an axis. The complex formed inerratic octahedron configuration, and π-π stacking weak interaction was observed between the molecules.

配合物为单斜晶系，P2(1)/C空间群，2个qina配体以氮原子和氧原子与Co离子螯合配位，2个DMSO以氧原子与Co离子轴向配位，形成规则的八面体构型配合物，分子之间存在π-π堆积弱相互作用。

From the structural analysis of three praseodymium complexes, we could draw a conclusion that as the dentate arms of carboxyl group on ligands elongating, the coordination numbers of Pr and the coordination modes of ligands increase, and the mean distances between metallic atoms of metallic helices existing in these complexes augment.2. By altering 5-substituting group of isophthalic acid three series of lanthanide complexes 8～19 with 5-methylisophthalic acid and 5-nitroisophthalic acid have been prepared.

从得到的三个配体的镨配合物的结构分析可以看出，随配体的羧基齿臂的增长，Pr的配位数逐渐增大，配体的配位模式增多，配合物中存在的螺旋金属链中的金属间平均距离增大。2、通过改变间苯二甲酸配体的5位取代基，制备了5-甲基间苯二甲酸和5-硝基间苯二甲酸的三个系列稀土羧酸配合物8～19。

Notch1 is expressed by stem cells resided in the cervical loop epithelium, and Notch signaling pathway play a central role in fate decision of those stem cells. Notch receptors and their ligands are involved in both patterning and cell fate determination during odontogenesis. Moreover, many cell factors, which are closely related with odontogenesis, could regulate expression of Notch receptors or their ligands.

既往研究显示：早在牙齿发育期，Notch1就表达于颈环星网状层的干细胞中，是其保持干细胞性质的重要机制；Notch-Delta信号还与成釉细胞、成牙本质细胞分化有关，被认为是牙齿发育细胞分化多样性的原因之一；另外，目前已明确与牙胚细胞分化有关的生长因子如TGFβ、FGF、BMPs等均可诱导Notch受、配体的表达。

The recent advancement of the asymmetric addition of organozinc reagent s to ketones and α-ketoesters is reviewed according to the type of the chiral ligands, with an emphasis on the introduction of the ligands with high efficiency and high selectivity.

按照手性配体的结构类型分类，综述了近年来有机锌试剂对酮、α-酮酯等化合物的不对称加成反应的研究进展，对高效、高选择性的手性配体在该类反应中的应用进行了重点评述。

In order to investigate the effects of thecomposition and structure of the conductive coordinative polymolecular compounds on theirconductivity,we choose the functional organic molecules that can form stable free-radicalions as the ligands,investigate the coordinative bridging interaction of the transition metals orrare earth ions with the ligands and the compositions and properties of the complexes.It willprovide scientific basis for the development and application of new conductive materials.

为了探讨和总结导电性配位高分子化合物的组成及结构与化合物导电性能的关系和规律，我们选择了能形成稳定自由基离子的功能性有机小分子化合物作为配体，研究它们与过渡金属离子及稀土离子的配位桥联作用以及有关配合物的组成和性质，从而为新型导电材料的开发和应用提供科学依据。

Transition metal Pyrazolyl ligands have attracted considerable attention as in catalysis, magnetic coupling, biological mimicry, electron transfer, optic-physics area because of pyrazolyl ligands have luxuriant self-assembly chemistry and as a kind of multifunctional organic ligand.

吡唑类配体是一种较复杂的多功能有机配体，有着丰富的自组装化学，使其形成的过渡金属配合物在催化、生物仿生、磁学耦合、电子转移和光物理性质等方面具有潜在的应用价值，近年来受到广泛的关注。

A novel mixed ligands sandwich copper complex with hydrotris borate and bihydrobis borate ligands Tp: hydrotris (pyrazolyl borate; Bp: bihydrobis borate was synthesized.

合成了一种新型Ⅱ三吡唑硼酸根和二吡唑硼酸根混合配体的&三明治&型铜配合物（Tp：三吡唑硼酸根，hydrotris borate；Bp：二吡唑硼酸根，bihydrobis borate）。

The results from ultraviolet spectroscopy and photo -luminescence spectroscopy revealed that:(1) Europium complexes based on neutral ligands, such as azaphenanthroline 2-aryl-5-(α-pyridyl)-1,3,4-ozadiazole had a strong UV absorbance at the wavelength of 290-350 nm and the characteristic PL spectrum of europium ion at 613 nm respectively;(2) The structures of ligands had a critical role influence on PL intensity of europium complexes.

紫外光谱和光致发光光谱研究表明：(1)以氮杂邻菲罗啉、2-芳基-5--1，3，4-噁二唑为中性配体的铕配合物在290～350nm左右都有强烈的紫外吸收，且在紫外光的激发下都能产生铕离子的特征光谱(613nm)；(2)配体的结构是影响铕配合物发光强度的关键因素之一。

The design, synthesis of crosslinked poly-salenCo complexes and their application in the HKR of terminal epoxides Di-salicylaldehydcs and tri-salicylaldchydes S-3, S-4, S-5 were synthesized from some easily prepared acids. The crosslinked polymeric ligands could be prepared by condensation of -1, 2-cyclohexanediamine stoichiometrically with a mixture of S-3 and S-4 in different proportions, polymeric catalysts were obtained by inserting the Co atoms to the ligands.

四 交联poly-salenCo络合物的设计合成及其在末端环氧化合物的HKR中的应用以几种易得的羧酸为骨架，设计合成出了相应的双水杨醛和三水杨醛S-3、S-4、S-5，将双水杨醛S-3和三水杨醛S-4按不同比例混合后再与手性环己二胺缩合制备出交联聚合物配体，该配体与Co络合后得到交联聚合物催化剂。

But the electrochemical results show that complexes exhibitcompletely irreversible redox behaviour which is different from thatfound in diiron proteins. 1.3 To obtain the diiron species which are stable to elec-trochemical reduction, a series of new tetranuclear cage ironspecies containing two 〓 cores, with using hexadentatepolybenzimidazole ligands, were synthesized and characterized by vari-ous spectroscopic methods. Their physical properties have been investi-gated. The crystal structures of 〓〓tetrakis (benzimidazol-2-ylmethyl)-1, 4-diaminobutane and 〓,〓-tetrakis ( N-ethylbenzimidazol-2-ylmethyl )-1, 4-diaminobutane were determined. They contain two 〓 cores which arelinked to each other by -〓-chain in the ligands.

1.3为了获得电化学还原稳定双核氧桥联Fe化合物，使用六齿配体合成了一系列含有两个〓单元四核笼状化合物，并用各种谱学手段表征了它们，还研究了它们的物理化学性质确定了〓L=N，N，N'，N'-四(苯骈咪唑基-1，4-丁二胺和〓，〓四-1，4-丁二胺化合物的晶体结构，它们含有两个〓单元，其中两个〓单元是通过配体的〓链桥联成四核笼状结构。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了