杯[4]冠醚对过渡金属离子的液膜传输行为  

Liquid Membrane Transport of Transition Metal Ions with Calix Crowns

作　　者：马会民[1] 王志华[1] 郑企雨[1] 温利权[1] 马泉莉[1] 苏美红[1] 黄志镗[1] 

机构地区：[1]中国科学院化学研究所分子科学中心,北京100080

出　　处：《高等学校化学学报》2001年第8期1315-1318,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 9875 0 32 );中国科学院院长基金等资助

摘　　要：藉杯芳烃衍生物的识别作用可以实现对金属离子的选择性液膜传输 .本文研究了 4种新型杯 [4 ]冠醚对 5种过渡金属离子 ( Cu2 + ,Fe3+ ,Co2 + ,Ni2 + ,Zn2 + )的液膜传输行为 .发现其中酯型杯 [4 ]冠醚 ( )对 Cu2 +有优良的传输效能 ,并详细考察了各种因素 (包括源相和受相酸度、离子载体 的浓度、时间及温度等 )的影响 .指出载体 对 Cu2 + 的传输为 H+ 交换机理 。Selective transport of metal ions across liquid membrane can be achieved by using calixarene derivatives with recognition groups. Four new calix crowns, in this work, were examined for the transport of transition metal ions such as Cu 2+ , Fe 3+ , Co 2+ , Ni 2+ and Zn 2+ . It was found that one of these calix crowns, 25,27 dihydroxy 26,28 (3,6 dioxa 2,7 dioxooctylene)dioxycalixarene (Ⅲ), transported efficiently Cu 2+ . Various factors affecting the transport of Cu 2+ with Ⅲ were investigated in detail, including source phase and receiving phases acidities, carrier concentration, time, temperature, etc .. The mechanism of H + exchange was suggested for the present system H 2O (liquid membrane) H 2O, and the transport process of Cu 2+ was briefly discussed.

关 键 词：液膜传输 杯[4]冠醚 过渡金属离子 铜(Ⅱ)离子 萃取 扩散 

分 类 号：O645.14[理学—物理化学] O614.121[理学—化学]