高氯酸钇冠醚配合物的研究 Ⅰ.三水高氯酸钇与18-冠-6在乙腈中配合行为的研究

Complexes of Crown Ether with Yttrium Perchlorate I. Studies on Coordination Behavior Between Y(ClO_4)_3·3H_2O and Crown Ether 18C6 in Methyl Cyanide

近年来，稀土冠醚配合物的研究受到重视，但稀土高氯酸盐冠醚配合物的研究报道尚少，有关高氯酸钇与18－冠－6（18C6）的配合物还未见报道，我们用改进的半微量相平衡方法研究了Y（ClO4)3·3H2O-18C6-CH3CN三元体系的20℃时的溶解度，以便确定三水高氯酸钇与18－冠－6在乙腈中能否形成配合物，能生成几种配合物，以及它们的相区如何，为合成固态配合物提供依据。在此基础上，分离、制备了固态配合物，利用化学分析，DTG、TG、DSC以及电导考查了配合物的组成与性质。

The solubilities of the ternary system, Y(ClO_4)_3·3H_2O-18C6-CH_3CN, at 20℃ have been investigated by the modified semimicro method for study of phase equilibrium. The results indicated that there are two kinds of complex formed in this system at 20℃, namely Y(ClO_4)_3·18C6·3H_2O·2.5CH_3CN and Y(ClO_4)_3·2(18C6)·3H_2O·2CH_3CN, which were isolated, and dried be give Y(ClO_4)_3·18C6·3H_2O and Y(ClO_4)_3·2(18C6)·3H_2O respectively. The composition and properties of the two complexes have been investigated by infrared spectra, conductivity measurements, DTG, TG, and DSC. The enthalpies of dehydration and decompositions have been determined for these two complexes by DSC.