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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
The sorption of platinum(II) and platinum(IV) at the surface of sorbents yields coordination compounds luminescing at 77 K under UV irradiation.
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In the course of complexation in each of the uranyl(VI)-ligand systems studied, only coordination compounds UO2L2 (L- is the deprotonated form of the ligand) are formed.
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Separation of Trivalent Americium and Rare-Earth Elements from Iron Impurity Using Certain Coordination Compounds
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The synergic effect was attributed to the formation of coordination compounds that are more hydrophobic than the initial compounds and have stronger bonds of Ce(III) with the ligands.
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Electrophysical Properties of Coordination Compounds Based on Cobalt(II) and Manganese(II) Chlorides and ε-Caprolactam
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| | In this paper the thermal stabilities of 25 oxalato coordination compounds have been studies mainly by gas chromatography.Information which can not be obtained from TG or DTA has been obtained by this method.The principal findings may be summarized as follows: 1.When the thermal decomposition of the oxalato complexes of various metals was carried out in helium,the crystalization and the coordination water were expelled.Thermal decomposition in hydrogen gave additional water as a result of ... | | 以气相色谱为主要手段,测定了25种草酸配位化合物的热稳定性,得到了许多差热分析和热失重方法所得不到的信息。二价金属草酸盐的热分解可分为三种类型:产生CO_2和金属,产生CO,CO_2和金属氧化物以及产生CO和金属碳酸盐。某些草酸盐的热分解同时按其中的两种类型进行。草酸配位化合物分解CO_2峰值温度随中心离子标准电极电位增加而降低,大致有线性关系t_p=-86.2E_1~0+273(℃)。还对二价金属草酸盐进行了理论计算,讨论了电子结构与热稳定性的关系。 | | 文摘来源 | | The hydrolytic polymerization of Cr3+ at rather high concentrations was studied pH-metrically. Four series of chromic nitrate solutions have been prepared of 0.160M, 0.200M,0.250M and 0.320M concentration, each with various pH and all with 0.5M sodium nitrate. The solutions were hold in polyethylene bottles and kept at 40±1°C. From time to time, a small portion of each solution was taken and its pH was measured at 30±0.1°C. When difference between the pH values measured over an interval of four days was les... | | 本文用pH法研究了Cr~(3+)在较高浓度下的水解聚合状态,发现了同一种Cr~(3+)水解体系的第二种“根+节”配位化合物——Cr[Cr(OH)]_n~((3+2n)+)(n=1,2)。其水解平衡常数为lgβ_(1,2)=-2.68,lgβ_(2,3)=-3.84。 | | 文摘来源 | | Solvent extraction of metal ions may be regarded as a multicomponental coordinative chemical reaction between two immiscible phases. This thermodynamic process is evidently influenced by the spatial configuration of both ligand and metal ion to be extracted. The steric feature consisting of shielding, conformational and spatial effects are, however, determined by the composition, structure and configuration of the coordination compounds. Steric effects play an important role in the investigation... | | 金属的溶剂萃取是两相间多组成的配位化学反应,配位体及被萃离子的空间结构对这个热力学过程有显著影响,它与形成热力学稳定的配位化合物有关。包括屏蔽效应,构象效应和空间张力在内的结构空间效应不仅决定于配位体及金属离子的结构,同时也与所形成的萃合物的结构和构型直接相联系,它是萃取剂分子设计数学模型中的重要结构参数。 稀土配位化合物一般为八面体构型,结构空间效应的影响不显著,但镧系收缩特性,为应用配位体的结构空间效应提供了可能性。 本文着重讨论了中性磷(膦)酸酯及酸性磷(膦)酸酯萃取稀土反应中的结构空间效应对萃取性能的不同影响,以及与反应的熵变值及萃合物结构的联系,同时对萃取稀土反应中有机取代基团Es值的测定作了探讨。 | | 文摘来源 | |   | | << 更多相关文摘 |
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