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Saccharin,as ligand in crystal,may be existed intypes of monodentate,bidentate,bridge and free anion.

对于糖精作为配体，在晶体中可以以单齿、双齿、桥联、自由阴离子等多种方式存在。

In addition,compared with Eu32,Eu3DPEPO has excellent fluorescent properties and a high thermal stability originating from the rigidity influence of DPEPO as bidentate ligand.

与Eu32 进行比较，证明中性双齿DPEPO 的刚性结构增强了铕配合物的荧光性能和热稳定性，可满足于印刷包装防伪等的需要。

The invention pertains to the field of chemical technology, which more particularly relates to a catalyst preparation method of Polystyrene by coordinating an type of bidentate ligand and a transition metal.

本发明属于化工技术领域，具体涉及一类型双齿配体与过渡金属配位的催化剂制备聚苯乙烯方法。

Because the solubility of the complex monomers is very important for polymerization, the bidentate ancillary ligand of the bicycloiridium complexes also has an effect on the luminous properties of the chelating polymer.

实验证明了在这类电磷光聚合物中配合物单元辅助配体合理的分子设计，可以提高配合物单体的溶解度，提高聚合物的分子量和发光性能。

At high pH value, histidine is transformed into a bidentate ligand after the deprotonization of its R-NH2, and thus the aggregation process is suppressed greatly.

这是由于多肽二级结构转化是一个协同性过程，只有pH值和温度的协同作用，才能诱导具有疏水特性的β-折叠片结构的形成，从而导致金纳米粒子的聚集和颜色变化。

In addition, compared with Eu3 (TPP0)2 , Eu3DPEPO has excellent fluorescent properties and a high thermal stability originating from the rigidity influence of DPEPO as bidentate ligand.

与Eu3(TPP0)2进行比较，证明中性双齿DPEPO的刚性结构增强了铕配合物的荧光性能和热稳定性，可满足于印刷包装防伪等的需要。

Metal-Organic coordination polymer is formed by self-assembly through coordination bond between bidentate or multbentate organic ligand and central metal ion.

金属有机配位聚合物是通过含给电子基团的双齿或多齿有机配体和一种或几种中心金属离子通过配位键自组装而形成的。

Bulky and electron-rich MOP-type phosphine ligand 2-ditertbutylphosphino-2'-isopropyloxy- 1,1'-binaphthyl (L1) shows good catalytic activity in palladium-catalyzed α-arylation of 1,3-dicarbonyl compounds.

富电子、大位阻MOP型烷基膦配体2-二叔丁基膦-2'-异丙氧基-1，1'-联萘(L1)在钯催化的1，3-二羰基化合物的α-芳基化反应中显示了较好的催化活性。

Bulky and electron-rich MOP-type phosphine ligand 2-ditertbutylphosphino-2 -isopropyloxy 1,1 -binaphthyl (L1) shows good catalytic activity in palladium-catalyzed α-arylation of 1,3-dicarbony compounds.

富电子、大位阻MOP型烷基膦配体2-二叔丁基膦－2'-异丙氧基－1，1'-联萘(L1)在钯催化的1，3-二羰基化合物的α-芳基化反应中显示了较好的催化活性。

X-ray single crystal analysis of a new paramagnetic manganese complex with DTPA-BpABA (a DTPA- bisamide derivative), Mn·4H2O, shows that four oxygen atoms and three nitrogen atoms from the ligand coordinate to Mn cation, forming a seven-coordinate distorted pentagonal bipyramid polyhedron.

采用X-射线单晶衍射法对锰与DTPA-BpABA(DTPA-二酰胺衍生物)形成的一个新的顺磁性配合物Mn·4H2O进行了结构测定。

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。