| 希土硝酸盐冠醚Yb(NO3)3·3H2O/B15C5配合物的研究 |
| STUDIES ON COMPLEXES OF CROWN ETHER WITH RARE EARTH NITRATES |
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| 摘要: 用改进的半微量相平衡方法研究了Yb(NO3)3·3H2O-B15C5-CH3COCH3三元体系在18℃时的溶解度,测定了各液相的折光率.结果指出只有一种化学计量的配合物(Yb(NO3)3·B15C5·3H2O·2CH3COCH3)生成.分离、洗涤、浓硫酸干燥器中恒重后,经化学分析,确定配合物的组成为:Yb(NO3)3·B15C5·3H2O·O65CH3COCH3.用红外光谱、DTG、TG及DSC等对配合物进行了研究.测得配合物的脱溶剂与热分解的热焓值(△H).按照Kissinger法,求得配合物热分解过程的表现活化能. |
| 关键词: 配合物 B15C5 硝酸镱 |
| 基金项目: 中国科学院科学基金资助课题 |
| Abstract: The solubility of Yb(NO3)3·3H2O-B15C5-CH3COCH3 system at 18℃ has been investigated by the modified semimicro method to study of phase equilibrium. The resultant indicated that there are two solubility curves in the ternary system: the long one corresponds to Yb(NO3)3·B15C5·3H2O·2CH3COCH3 solid phase, the short one the solid phase B15C5. The eutec-tic ponit occurs at 7.45%Yb(NO3)3·3H2O, 35.27% B15C5 and 57.28% CH3COCH3. The curve of refractive indexes in saturated solutions consist of two curves which correspond with solubility curves.The behavior of water in this system has been examined. The resultsindicate that the mole ratio, H2O/Yb(NO3)3 no matter whether it is in li-quid phase or solid phase, is equal to 3:1.The complex has,been isolated. Its chemical; analysis results show that it is Yb(NO3)3·B15C5·BH2O·0.65 CH3COCH3. This complex investigated by infrared spectra,DTG, TG and DSC. The infrared spectra; show that the nitrate, group is bidentate coordination ligand for this complex. The enthalpies of desolvent(H2O and. CH3COCH3)and, decomposition have been determined by DSC and the apparent activation energy, of the thermal decomposition, has been evaluated, by DSC curves with Kissinger method. |
| Keywords: coordination compound corwn ether ytterbium nitrate |
| 投稿时间：1986-09-17 |
| 摘要点击次数: 1482 |
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| 薛鸿福,吕余刚,邱向明,任德厚,刘子如,阴翠梅.希土硝酸盐冠醚Yb(NO3)3·3H2O/B15C5配合物的研究[J].无机化学学报,1987,3(4):69-76. |
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