钇与偶氮氯膦MK多配位络合物溶液光谱性质的研究

Investigation of Spectral Properties for Yttrium Chlorophosphonazo MK Complex Solution

在 p H3.2 9溶液中 ,钇 ( )与偶氮氯膦 MK( CPAMK)发生灵敏配位反应 ,本文应用 β-修正分析理论研究此配合物溶液性质的测定 ,包括配位比、逐级摩尔吸收系数、络合物稳定常数等。研究结果表明 :所生成络合物为 Y( CPAMK) 8,是多配位反应 ,此络合物在 641nm波长处摩尔吸收系数 ε=2 .2 3× 10 5L·mol-1· cm-1、累积稳定常数 K=3.90× 10 39。

The reaction of yttrium (Ⅲ) with chlorophosphonazo MK(CPAMK) at pH3.29 was studied by beta correction spectrophotometry.The properties of the complex solution were determined in detail,such as complexation ratio,stepwise molar absorptivity and stability constant.Results show that the formed complex is expressed as Y(CPAMK) 8,the real(not apparent) absorptivity ε is 2.23×10 5L·mol -1 ·cm -1 at 641nm and the cumulative stability constant K is 3.90×10 39 at 15℃ with ion strength 0.01.