离子结构

The recent progresses in the study on the fluorescence of rare earth complexes and application for the determination of the rare earth elements and organic compounds, as fluorescent probes for bioactive materials analysis and as detection means in separation technology were reviewed in detail. In chapter two, the absorption spectra of the 4f electron transitions of the complexes of the neodymium, praseodymium, holmium and erbium with fleroxacin in the presence of CPC have been studies by normal and derivative spectrophotometry.

本文以稀土元素配位化学为基础，以导数吸收光谱技术和荧光光谱技术为研究手段，利用新一代喹诺酮类抗菌药物，抗凝血类杀鼠药物的化学结构特点和大环化合物冠醚与金属离子突出的配位能力，以分析应用为目标，系统研究了这些化合物同稀土元素形成的配合物的光吸收和荧光特性，通过对体系实验条件的优化，使体系的稳定性、选择性和灵敏度得到显著改善。

Cu and Co ions are coordintated with six oxygen atoms from two water molecules and four ligands to form an octahedral geometry. Each ligand links two metal ions in a μ2-bridge coordination mode and two-dimensional wavelike structures are formed.

Cu和Co均为六配位，八面体构型，每个金属离子与4个配体和2个水分子配位，每个配体采取μ2-桥联模式，形成二维层状结构。

This paper shows the importance of ability of iron to occur on both the tetrahedral and octahedral sites of the spinel structure.

表明铁离子出现在尖晶石结构中四面体间隙位和八面体间隙位的能力是极为重要的。

Co ion is six?coordinated to form a distorted octahedron.

配合物中Co离子是六配位变形八面体结构。

Each Cu atom is coordinated by four nitrogen atoms from two different dpphens and two oxygen atoms from fumarate with a distorted octahedron geometry.

配合物中每个Cu离子与来自两个dpphen的4个N和一个fum的2个O配位，形成畸变的八面体结构单元。

On the base of reviewing the development of lithium ion battery and its cathode materials in detail, olivine LiFePO4 were chosen as cathode material and their synthesis and modification were studied.

本文在详细评述了锂离子电池及其正极材料研究进展的基础上，选取橄榄石结构的LiFePO4为研究对象，对其合成和改性进行了详细研究。

Ion pairs with different structure of either dye anion or onium cation have different properties.

染料母核和碘翁阳离子的结构均对离子对体系的性质有影响。

At least one layer of said I-Polar is optically anisotropic and is made by means of Cascade Crystallization Process, is characterized by a globally ordered biaxial crystalline structure with an intermolecular spacing of 3.4 } 0.3 A in the direction of one of optical axes, is transparent in the visible spectral range, and is formed by rodlike supramolecules representing at least one polycyclic organic compound with a conjugated -system and ionogenic groups.

所述I-Polar中至少有一层是光学各向异性的，并通过级联结晶工艺制得，其特征是在一个光轴方向上具有3.4±0.3的分子间间距的全局有序的双轴晶体结构，该层在可见光光谱区域内是透明的，并由代表至少一种具有共轭π体系和离子型基团的多环有机化合物的棒状超分子形成。

Electron paramagnetic resonance spectrum is an effective tool to investigate the optical and magnetic properties of crys...

电子顺磁共振谱是研究掺过渡和稀土金属离子晶体及络合物的微观结构、光学和磁学性质等的有力工具。

Methods: Antineoplastic compounds were screened by bioassay-guided method with partitive extraction and multiple column chromatographies(Sephadex LH-20, ODS and preparative HPLC). Structures of active compounds were determined by high-resolution 2D NMR(600 MHz) and ESI-MS techniques.

通过分级萃取和多种硅胶柱层析（Sephadex LH-20凝胶过滤、ODS反相层析和HPLC）追踪分离抗癌活性成分；利用电喷雾离子质谱和高分辨(600 MHz)核磁共振二维谱技术鉴定化合物的结构。

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。