高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (2): 195.

• 论文 • 上一篇    下一篇

Zn(NO3)2-Leu-H2O体系(25℃)的相平衡及新相配合物的合成与性质

高胜利, 杨旭武, 陈三平, 李焕勇, 史启祯   

  1. 陕西省物理无机化学重点实验室, 西北大学化学系, 西安 710069
  • 收稿日期:2002-03-26 出版日期:2003-02-24 发布日期:2003-02-24
  • 通讯作者: 高胜利(1946年出生),男,教授,博士生导师,从事配位化学和热化学研究.
  • 基金资助:

    国家自然科学基金(批准号:29871032和20171036)资助

Synthesis, Properties and Phase Equilibrium of Zn(NO3)2-Leu-H2O System(25 ℃)

GAO Sheng-Li, YANG Xu-Wu, CHEN San-Ping, LI Huan-Yong, SHI Qi-Zhen   

  1. Shaanxi Key Laboratory of Physico-inorganic Chemistry, Department of Chemistry, Northwest University, Xi′an 710069, China
  • Received:2002-03-26 Online:2003-02-24 Published:2003-02-24

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摘要： 用半微量相平衡方法研究了硝酸锌-亮氨酸-水体系在25℃及全浓度范围内的溶度性质,绘制了体系的相图和饱和溶液折光率曲线,发现并制备了未见报道的非一致溶解配合物[Zn(Leu)(NO3)2(H20)]·H20(A)和Zn(Leu)2(NO3)2·H20(B),通过化学分析、元素分析、IR和TG-DTG等对其组成、结构及热稳定性进行了研究.用精密转动弹热量计测定配合物的标准燃烧能分别为(-12692.80±5.83)和(-15345.71±9.11)J/g,求得它们的标准燃烧焓分别为(-4523.22±2.08)和(-7208.86±4.28)kJ/mol,标准生成焓分别为(-615.67±2.27)和(-1863.16±4.60)kJ/mol

关键词: 三元体系, 硝酸锌, 亮氨酸, 表征, 标准生成焓

Abstract: The solubility of Zn(NO3)2-Leu-H20 system at 25 ℃ in the entire concentration range has been investigated by phase equilibrium method. The corresponding phase diagram and refractive index diagram have been constructed. The incongruently soluble complexes [Zn(Leu)(NO3)2(H20)]·H20(A) and [Zn(Leu)2(NO3)2·H20(B)] which have not been reported in literature, have been prepared. The compounds are characterized by IR spectra, TG-DTG, as well as chemical and elemental analyses. The constant volume combustion energies of the complexes, ΔcE(complex, s), have been determined by a precision rotating bomb calorimeter at 298.15 K. The standard enthalpies of combustion, ΔcHmθ(complex, s), and standard enthalpies of formation, ΔfHmθ(complex, s), are calculated for the complexes.

Key words: Ternary system, Zinc nitrate, Leucine, Characterization, Standard enthalpy of formation

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