| 微量热法测定RE(Et2dtc)3(phen)配合物的比热容 |
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| 引用本文： | 葛红光,焦宝娟,帅琪,刘明艳,陈三平,胡荣祖,高胜利.微量热法测定RE(Et2dtc)3(phen)配合物的比热容[J].中国化学,2005,23(11):1495-1498. |
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| 作者姓名： | 葛红光 焦宝娟 帅琪 刘明艳 陈三平 胡荣祖 高胜利 |
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| 作者单位： | [1]Department of Chemistry, Shanxi Key Laboratory of Physical and Inorganic Chemistry, Northwest University, Xi＇an, Shaanxi 710069, China [2]Department of Chemistry, Shanxi University of Technology, Hanzhong, Shaanxi 723001, China [3]Mianyang Chinese Physics Thermal Analysis Instrument Co. Ltd., Mianyang, Sichuan 621900, China [4]Xi＇ an Modern Chemistry Research Institute, Xi＇ an, Shaanxi 710065, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （No. 20271036）, the Foundation of Education Committee of Shaanxi Province （No. 01JK229） and the National State Doctoral Foundation. |
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| 摘 要： | A calculation formula for determining the specific heat capacity of solid compound with an improved RD496-Ⅲ microcalorimeter was derived. The calorimetric constant and precision determined by the Joule effect were （63.901±0.030）μV/mW and 0.3% at 298.15 K, respectively, and the total disequilibrium heat has been measured by the Peltier effect. The specific heat capacities of two standard substances （benchmark benzoic acid and α-Al2O3） were obtained with this microcalorimeter, and the differences between their calculated values and literature values were less than 0.4%. Similarly, the specific heat capacities of thirteen solid complexes, RE（Et2dtc）3（phen） （RE=La, Pr, Nd, Sm-Lu, Et2dtc： diethyldithiocarbamate ion, phen： 1,10-phenanthroline） were gained, and their total deviations were within 1.0%. These values were plotted against the atomic numbers of rare-earth, which presents tripartite effect, suggesting a certain amount of covalent character in the bond of RE^3＋and ligands, according to Nephelauxetic effect of 4f electrons of rare earth ions.
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| 关 键 词： | 镧 化合物 热容量 分子结构 微观结构 |
| 收稿时间： | 2005-02-01 |
| 修稿时间： | 2005-02-012005-07-21 |
Determination of the Specific Heat Capacity of RE(Et2dtc)3(phen) by Microcalorimetry |
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| GE,;Hong-Guang;JIAO,;Bao-Juan;SHUAI,;Qi;LIU,;Ming;-Yan;CHEN,;San-Ping;HU,;Rong-Zu;GAO,;Sheng-Li.Determination of the Specific Heat Capacity of RE(Et2dtc)3(phen) by Microcalorimetry[J].Chinese Journal of Chemistry,2005,23(11):1495-1498. |
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| Authors: | GE ;Hong-Guang;JIAO ;Bao-Juan;SHUAI ;Qi;LIU ;Ming;-Yan;CHEN ;San-Ping;HU ;Rong-Zu;GAO ;Sheng-Li |
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| Abstract: | A calculation formula for determining the specific heat capacity of solid compound with an improved RD496‐III microcalorimeter was derived. The calorimetric constant and precision determined by the Joule effect were (63.901±0.030) µV/mW and 0.3% at 298.15 K, respectively, and the total disequilibrium heat has been measured by the Peltier effect. The specific heat capacities of two standard substances (benchmark benzoic acid and α‐Al2O3) were obtained with this microcalorimeter, and the differences between their calculated values and literature values were less than 0.4%. Similarly, the specific heat capacities of thirteen solid complexes, RE(Et2dtc) 3(phen) (RE=La, Pr, Nd, Sm? Lu, Et2dtc: diethyldithiocarbamate ion, phen:1,10‐phenanthroline) were gained, and their total deviations were within 1.0%. These values were plotted against the atomic numbers of rare‐earth, which presents tripartite effect, suggesting a certain amount of covalent character in the bond of RE3+ and ligands, according to Nephelauxetic effect of 4f electrons of rare earth ions. |
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| Keywords: | microcalorimetry disequilibrium heat solid complex specific heat capacity |
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