| 希土(Ⅲ)—氨基多羧酸配位热的测定 |
| DETERMINATION OF HEATS OF COORDINATION FOR RARE-EARTH IONS WITH AMINOPOLYCARBOXYLATE LIGANDS |
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| 摘要: 本文测量了置换反映:RE3++MgY2-=REY-+Mg2+和RE3++MgZ3-=REZ2-+Mg2+在离子强度I=0.10MNaClO4,298.15K时的焓变(RE=La、Ce、Pr、Nd、Sm、Eu、Gd、Dy、Ho、Yb、Y.Y4-为EDTA酸根,Z5-为DTPA酸根).借助配离子MgY2-和MgZ3-的生成热文献数据,求得了RE3+—Y4-和RE3+—Z5-的配位热△H,并进一步计算出配离子REY-和REZ2-的其他生成热力学参数△G和△S.利用内插法粗略地估算了Tb、Er、Tm、Lu四元素相应的热力学量. |
| 关键词: 配位热 希土 氨基多羧酸 |
| 基金项目: 中国科学院科学基金资助的课题 |
| Abstract: The enthalpy changes of the replacement reactions: RE3++MgY2-=REY-+Mg2+和RE3++MgZ3-=REZ2-+Mg2+ have been measured ca-lorirnetrically at 298.15K, keeping ionic strength I=0.10M NaC1O4; where RE=La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Yb, Y; Y4- and Z5- represent the radical of ethylenediamine tetra-acetic acid(EDTA)and di-ethylenetriamine-penta-acetic acid(DTPA)respectively. Using literature data of heats of formation for coordination ion MgY2- and MgZ3-, the thermodynamic parameters(△H,△G and △S)of formation of coordination ions REY- and REZ2- were calculated. Furthermore, corresponding thermodynamic quantities for other four rare-earth elements(Tb, Er,Tm, Lu)were estimated by interpolation. |
| Keywords: heat of coordination rare-earth aminopolycarboxylate |
| 投稿时间：1986-07-17 |
| 摘要点击次数: 1898 |
| 全文下载次数: 1734 |
| 尹敬执,蒋本杲,孙同山,孙宏建.希土(Ⅲ)—氨基多羧酸配位热的测定[J].无机化学学报,1987,3(3):69-77. |
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