配体

Inthis papor,we synthesize and symbolize three sulphide bicarboxylate ligands such as 2.5-bis-1.3,4-thiadiazole;2,2 -(o-phenylenedimethylenethio) diacetic acid(L11); 2,2 -(m-phenylenedimethylenethio) diacetic acid.

本文合成和表征了2，2′-(1，3，4-噻二唑-2，5-二硫基)二乙酸、2，2′-邻苯二甲硫基二乙酸和2，2′-间苯二甲硫基二乙酸三个含硫二元羧酸配体。

For certain reactions, they function as chemoenzymes and produce both good chemical and optical yields. Over the last decade a wide range of C〓-symmetric chiral bisoxazoline ligands have been synthesized from readily available diacid derivatives and amino alcohols.

但是，手性双噁唑啉催化的某些不对称反应的机理以及影响双噁唑啉分子催化性能的结构要素目前仍不是很清楚，诱导某些反应的不对称选择性仍有待于进一步提高，因此需设计和合成新的双噁唑啉类配体。

The three tetranuclear copper complexes are structurally analogous and they all consist of a pair of [Cu22]+ or [Cu22]+ fragments bridged by a deprotonated dicarboxylate into dumbbell-shaped, neutral, tetranuclear molecules.

三个四核混合价铜化合物具有相似的分子结构，它们由一对[Cu22]+或 [Cu22]+碎片和一个架桥的二羧酸配体组成中性的四核的哑铃型结构。

On the other hand, a method for the synthesis of-vinyl chalcogenides by the coupling of vinyl bromides with thiols or diphenyl diselenide using copper salts as catalysts in ionic liquids based on amino acids also has been described. The ionic liquids play multiple roles in the reaction: they act as solvent, base, and excellent promoter for the copper-catalyzed coupling reactions.

在新型的氨基酸负离子的离子液体中，开发了一个亚铜盐催化的Z-型溴代烯烃与硫族元素的交叉偶联反应，为立体选择性的制备Z-型烯基硫醚或烯基硒醚类化合物提供了一个新的方法；在此反应体系中，离子液体不仅起到了反应溶剂的作用，而且还起到了金属催化剂的配体和中和反应副产物的碱的作用。

Firstly,two novel rare earth complexes(CH_2=CHO)Ln~Ⅲ[2,6-_2PhNSiMe _3]_2Li_3Ln=Y(2,Yb(3)containing arylamido and enolate mixed ligands have been synthesized by treatment of 2 equiv of of 2,6-~iPr_2PhNHSiMe_3 with exces n-BuLi at -78℃in THF for 12h,followed by reaction with 1 equiv of LnCl_3at 80℃for 24h in one-pot.All the two compounds were characterized by spectroscopic methods,elemental analyses,and a single-crystal X-ray diffraction study.

首先，-78℃下，在两当量的2，6-~iPr_2PhNHSiMe_3(1)THF溶液中加入过量的n-BuLi，反应12小时，再加入一当量的LnCl_380℃下，反应24小时，一锅法合成了含胺基、乙烯醇基混合配体的新型稀土金属配合物(CH_2=CHO)Ln~Ⅲ[2，6-_2PhNSiMe_3]_2Li_3Ln=Y(2、Yb(3)，上述化合物结构经单晶X-ray衍射、光谱和元素分析表征，表明我们得到的是一类新型的三价稀土配合物。

Erythrina trypsin inhibitor is a Kunitz-type trypsin inhibitor, which inhibits both trypsin and tissue-type plasminogen activator. Immobilized ETI is an effective ligand for the affinity purification of these enzymes.

刺桐胰蛋白酶抑制剂是一种Kunitz型胰蛋白酶抑制剂，能够抑制胰蛋白酶及组织型纤溶酶原激活剂的活性，因此ETI可以作为配体与固定相偶联用于亲和层析。

There are three different superfamilies of extracellularly activated ligand-gated ion channel subunits: nicotinic receptor, ATP gated channels and glutamate activated cationic channels.

其间有三个不同的细胞外激活的配体门控离子通道亚基的超家族，烟碱受体、ATP门控通道受体和谷氨酸激活阳离子通道。

With the development of molecular biology, based on yeast two-hybrid, many techniques such as yeast one-hybrid, reverse two-hybrid, three-hybrid, and extranuclear two-hybrid were set up to be applied in the research on the interaction between protein-protein, protein-DNA, protein-RNA, and protein-ligand.

随着分子生物学的发展，在酵母双杂交的基础上又建立起了酵母单杂、反向双杂交、三杂交及核外双杂交等多项技术，并已经成功地运用于蛋白质之间、蛋白质与DNA、RNA和配体之间相互作用的研究。

And 〓 are the first of the ligands appended fluorenyl.

合成含芴的配体这是第一个。

We have synthesized fourdioxotetraamine ligand appended with fluorenyl group and their transition metal complexes.The crystal structures of the complexes were determined by x-ray diffraction. Stability,electrochemistry and switch properties in aqueous solution was studied by pH-potentiometricand fluorimetric titration as well as cyclic voltammetry.

合成了带侧链荧光基团—芴的二氧四胺配体及其过渡金属配合物，测定了过渡金属配合物的晶体结构，研究了他们在水溶液中的稳定性、电化学性质和荧光开关性质。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。