离子键

FT-IR spectrum showed that the new bands at 3000cm-1~2700cm-1 and 1600cm-1~1400cm-1 were assigned to the C-H telescopic vibration and the framework vibration feature of imidazole ring, besides the characteristic bands of BMMs appeared in all samples, however, all of characteristic bands for imidazolium ionic liquid disappeared in the samples when calcined at 550oC, which implied that the structure of imidazolium ionic liquid has been destroyed during calcinations.

FT-IR分析测试中3000cm-1~2700cm-1及1600cm-1~1400cm-1波数范围内的谱带被认为是饱和的C-H伸缩振动和芳环骨架振动，说明离子液体的存在，这些峰只在萃取样品中出现，可见键连的离子液体的结构在焙烧过程中被破坏。

As metal ions can interact with both of ADM and DNA, they undoubtedly affect the interaction between ADM and DNA. Addition of a large excess of Cu or Fe into a solution of well-formed ADM-DNA complex makes the metal ions simultaneously bind to ADM and DNA to form a ternary complex. Otherwise,〓 or 〓 complexes can bind directly to DNA to form a ternary complex.

金属离子-ADM-DNA三元体系的光谱研究表明，当ADM与DNA结合后，大量Cu或Fe的加入可以使金属离子进入到ADM-DNA复合物中，并同时与ADM和DNA键合，形成三元复合物；反之，若ADM先与Cu或Fe配位，生成的金属配合物则能够直接与DNA结合形成三元复合物。

Films are obtained via dip-coating process. The results show that the isolated and tetrahedrally coordinated Ti(superscript 4+) which formed Ti-O-Si bondon the pore inner surface of the framework.

实验结果表明，多孔薄膜中的钛离子形成了Si-O-Ti键的孤立四配位形态，使薄膜具有复合型钛离子的催化效果，并且有介孔结构。

According to element bonding parameter topological index and calculate topological index of 36 variety metal ions.

本文应用元素键参数拓扑指数计算了36种金属离子的拓扑指数，用于关联金属离子与氨三乙酸配位稳定常数的研究，得到了好的线性相关性。

The initial interaction modes of pyreno[2,1-b]pyrrole and its dimeric derivative with F in MeCN can be understood as hydrogen-bonded complexes. Excess F ions promotes deprotonation of N-protons and results in the bathochromic changes in both absorption and fluorescence spectra.

实验过程中发现，在初始模式中，芘骈吡咯及双芘骈吡咯与氟离子形成氢键附合物；之后加入的氟离子，因其带有极强的碱性，将促使吡咯官能基中氮上氢进行去质子化，而造成吸收及萤光光谱的红位移现象。

The extraction equilibrium constants of Nd , Eu , Am in the system of seven monoacidic organophosphorus compounds dodecane 1. 0mol/l NO〓are reported. The dependency of the extractability on the PO〓function group、bonding charactor、metallic ion species and the structure of substitute has been examined.

给出了七个烷基磷酸的正十二烷熔液从1.0mol／lNO〓水溶液中萃取Nd、Eu、Am的平衡分配常数Kex，考察了萃取剂PO〓官能团、萃合物成键特性、金属离子及取代基结构与萃取性能间的关系，发现了：（1）可运用取代基自由能加和模型预测辛基膦酸辛基酯对La、Eu、Nd、Am等三价离子的平衡分配数据。

In complexes 8～16 synthesized by hydrothermal method, most of the ligands adopt multidentate coordination modes joining several lanthanide ions into high-dimensional coordination polymers. And changing of 5-substituting group on isophthalic acid has a little effect on the coordinated abilities of the meta-carboxyl groups.

水热法制备的配合物8～16中，配体多采取多齿配位模式桥连多个稀土离子，形成高维配位聚合物，同时由于羧基氧原子和稀土离子的强的键合力，间苯二甲酸的5位取代基的变化对间位羧基的配位能力的影响不大。

By using density functional theory B3LYP/6-311G++method, the geometric configuration was optimized for tetrahydrofuran、butylene oxide、 secondary oxonium ion and tertiary oxonium ion. And parameters about the electronic structure, bondlength, energy of frontier orbital of these species were determined.

采用DFT中的B3LYP/6-311G++方法对四氢呋喃和环氧丁烷单体、仲氧鎓离子以及叔氧鎓离子进行了几何构型的全优化，确定了各个构型的电子结构、键长和前线轨道能量等参数，并运用前线轨道理论从微观层次上分析了四氢呋喃和环氧丁烷的阳离子均聚反应机理。

Triatomic molecules We studied the interaction of linear triatomic molecules CO〓 and CS〓 with the intense femtosecond laser field at different intensities and polarization states. The kinetic energy of the C ion is much less than that of the O ion at the same charge states indicating that the Coulomb explosion is a concerted process, that is, the two C=O broke simultaneously.

三原子分子研究了不同强度的不同偏振的飞秒强激光场和线性三原子分子CO〓和CS〓的相互作用。C离子的平动能要远小于同电荷数的O离子的平动能，表明库仑爆炸是一个协同过程，两个C=O键同时断裂。

The carboxyl of the tripodal ligand is a goodbridging group. The building blocks are linked together by the bridging group andother weak interactions (hydrogen bond and π-π stacking interaction, etc), thusgenerating a one, two or three-dimensional metal complexes.2. Studies on the fluorescence properties of the lanthanide complexes indicated that:(1) The excitations in the ligand-based π-π〓 transitions cause the structuredemission of lanthanide complexes while the ligand luminescence is completelyquenched showing that ligand-to-metal energy transfer occurs.

三脚架配体所带的羧基是一个很好的桥联基团，配合物的结构基元通过这种基团的桥联作用及其它一些弱的作用力(如氢键、π-π堆积作用等)联系起来，构成了一维、二维或三维的超分子空间结构。2、稀土配合物的发光研究发现：(1)用配体的π-π〓跃迁波长进行激发，配合物均显示出稀土离子的特征发射峰，同时，配体的荧光峰没有出现，这说明在三脚架配体与稀土离子间进行了有效的能量传递。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。