La(ClO_4)_3·3H_2O与18C6在乙醇中配合行为的研究

Studies on Coordination Behavior of La(CIO_4)_3·3H_2O and Crown Ether 18C6 in Absolute Alcohol

采用改进的半微量相平衡方法研究了La(ClO_4)_3·3H_2o—18c6—C_2H_5OH三元体系在25℃时的溶解度,测定了各饱和液相的检光率,结果表明有了三种化学计量的配合物(4La(ClO_4)_3·3(18C6)·12H_2O·9C_2H_5OH;La(ClO_4)_3·18C6·3H_2O·2C_2H_sOH和La(ClO_4)_3·2(18C6)·3H_2O·C_2H_5OH)生成。分离制备了两种配合物,经化学分析测定,确定了配合物的组成为La(ClO_4)_3·18C6·3H_2O与La(ClO_4)_3·2(18C6)·3H_2O;用IR,TG,DTG及电导对配合物进行了研究。

In this paper, the solubiuty of La(CIO_4)_3·3H_2O-18C6-C_2H_5OH system at 25℃ has been investigated by the modified sEmimicro method of phase eqUIlibriUm. The refreaction indexes of the saturated solution have been determined. The results inclicated that these were three coordination compounds (4La(CIO_4)_3· 3(18C6)·12H_2O· 9C_2H_5OH. La(CIO_4)_3·18C6·3H_2O. 2C_2H_5OH and La(CIO_4)_3·2(18C6)·3H_2O· 2C_2H_5OH )formed. Two coordination compounds have been isolated from organic solvent. It is determined by chemical analysis that the dried samples are composed of La(CIO_4)_3·18C6·3H_2O and La(ClO_4)_3·2(18C6)· 3H_2O. The coordination compounds we investigated by IR,DTG,TG and conductivity measurements.