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在THF介质中合成了2:1型固体配合物2EuCl_3·DCH-24-c-8·2THF·2H_2O和4:3型团体配合物4SmCl_3·3(18-c-6)·4H_2O及4YbCl_3·3(18-c-6)·4H_2O。在氩气氛中用锂-萘使Ln~(3+)还原,制得了三种相应的二价稀土氯化物与DCH-24-c-8和18-c-6的固体配合物2EuCl_2·DCH-24-c-8·2H_2O、4SmCl_2·3(18-c-6)·4H_2O及4YbCl_2·3(18-c-6)·4H_2O。元素分析、红外光谱、电子自旋共振谱、差热-热重分析、还原性实验及偏光显微镜下的光性研究不但证实了冠醚与稀土离子的配位作用,而且说明Ln~(2+)及Ln~(3+)的冠醚配合物在物理及化学性质上存在着差别。
The solid complexes 2EuCl 3 · DCH-24-c-8 · 2THF · 2H 2 O and 4S 3 (18-c-6) · 4H 2 O and 4YbCl 3 · 3 (18-c-6) · 4H 2 O. In the argon atmosphere lithium-naphthalene Ln ~ (3 +) reduction, prepared three corresponding divalent rare earth chloride and DCH-24-c-8 and 18-c-6 solid complex 2EuCl 2 · DCH- 24-c-8 · 2H 2 O, 4SmCl 2 · 3 (18-c-6) · 4H 2 O and 4YbCl 2 · 3 (18-c-6) · 4H 2 O. The results of elemental analysis, infrared spectrum, electron spin resonance spectrum, DTA-TG, reducibility experiments and optical properties under polarized light microscope not only confirmed the coordination between crown ether and rare earth ions, but also demonstrated that Ln 2+ ) And Ln ~ (3+) crown ether complexes in the physical and chemical properties are different.