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化学学报
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化学学报 ›› 1994, Vol. 52 ›› Issue (7): 699-704. 上一篇    下一篇

研究论文

12-十八烷基-1, 4, 7, 10-四氮杂环十三烷-11, 13-二酮液膜传输Cu^2+ 的动力学研究

罗勤慧;朱守荣;沈孟长;张正   

  1. 中国科学院长春应用化学研究所
  • 发布日期:1994-07-15

A study on transport kinetics of Cu^2+ by liquid membrane of 12- octadecyl-1, 4, 7, 10-tetrazacyclotridecane-11, 13-dione

LUO QINHUI;ZHU SHOURONG;SHEN MENGCHANG;ZHANG ZHENG   

  • Published:1994-07-15

PDF

335

被引次数

9

合成了新的大环配体12-十八烷基-1, 4, 7, 10-四氮杂环十三烷-11, 13-二酮(odt), 研究了odt的液膜传输Cu^2+的动力学。结果表明传输过程为串联一级反应,k~1=8.1×10^3h^-1, K~2=5.5×10^-2h^-1。载体odt与Cu^2+生成配合物的反应速率比配合物离解反应速率小, 前者为速率控制步骤。传输过程无阴离子参加, 但受溶液酸度控制, 根据酸度的不同, 可将Cu^2+选择性地由低浓度向高浓度传输, 这与细胞对金属离子的主动传输类似。

关键词: 反应动力学, 氮杂环化合物, 铜络合物, 大环化合物, 二元酮, 细胞膜, 传输特性, 国家教委高等学校博士学科点专项科研基金, 液膜传输, 仿生化学

A new macrocyclic ligand 12-octadecyl-1,4,7,10-tetraazacyclotridecane-11,13-dione (odt) was synthesized and the transport kinetics of Cu2+ by liquid membrane of odt was studied. The results showed that the transport is a consecutive first order process with k1 = 8.1x10-3h-1 and k2 = 5.5x10-2h-1. The formation rate of complex of odt with Cu2+ is lower than dissociation rate of the complex, therefore the complex formation is the rate-controlling step. The transport process is not concerned with anions as participants but is controlled by acidity. Cu2+ is transported selectively from the region of low concentration to that of high concentration by controlling acidity. This is similar to active transport of metal ions by cell membrane.

Key words: REACTION KINETICS, NITROGEN HETEROCYCLICS, COPPER COMPLEX, MACROCYCLIC COMPOUNDS, DIKETONE, CELL MEMBRANE, TRANSMISSION CHARACTERISTICS, BIOMIMETIC CHEMISTRY

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