高等学校化学学报

高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (4): 501.

• 论文 •    下一篇

杂元素冠醚研究(Ⅻ)──氧、硫、硒和碲杂冠醚的液膜迁移性能比较

李卫平, 龚淑玲, 刘秀芳, 卢雪然, 徐汉生   

  1. 武汉大学化学系, 武汉 430072
  • 收稿日期:1995-04-26 出版日期:1996-04-24 发布日期:1996-04-24
  • 通讯作者: 徐汉生
  • 作者简介:李卫平,男,28岁,博士,讲师.
  • 基金资助:

    国家自然科学基金;国家教育委员会博士点基金

Studies on Heteromacrocyclic Polyether(Ⅻ)──Liquid Membrane Transport Properties of Metal Cations by Oxa-,Thia-,Selena- or TeIlura-Crown Ether

LI Wei-Ping, GONG Shu-Ling, LIU Xiu-Fang, LU Xue-Ran, XU Han-Sheng   

  1. Department of Chemistry, Wuhan University, Wuhan 430072
  • Received:1995-04-26 Online:1996-04-24 Published:1996-04-24

PDF (PC)

被引次数

9

摘要： 报道了碲杂冠醚(TeB15C5)对Na+、K+、Ag+和Pb2+的液膜迁移能力,并与相应的全氧冠醚(B15C5)、硫杂冠醚(SB15C5)和硒杂冠醚(SeB15C5)作了比较;同时以SeB15C5对K+的迁移为例考察了冠醚浓度和盐浓度对迁移速率的影响,结果表明,TeB15C5对Na+、K+和Pb2+的迁移能力比SB15C5和SeB15C5强,但对Ag+的迁移速率比后两者慢;SeB15C5对Ag+的迁移速度比SB15C5快,两者对Ag+的选择性都相当高,可以用来分离和回收银等贵重金属。

关键词: 冠醚, 硫杂冠醚, 硒杂冠醚, 碲杂冠醚, 液膜迁移

Abstract: The liquid membrane transport rates of the nitrate saIts of Na+,K+, Ag+ andPb2+ by 10-tellurabenzo-15-crown-5(TeB15C5)were firstly determined, and compared withthose by the corresponding benzo-15-crown-5(B15C5), 10-thiabenzo-15-crown-5(SB15C5)and 10-selenabenzo-15-crown-5(SeB15C5).At the same time,the effects of the concentrations of SeB15C5 in the membrane phase and K+ in the source phase on the transport rates of K+were also investigated.The experimental data indicate that the relationship is linear between the transport rates of K+ and the concentrations of SeBl5C5 and K+ respectively.Thetransport rates of Na+,K+ and Pb2+ by TeB15C5 are larger than those by SB15C5 andSeB15C5,but the transport rates of Ag+ by SB15C5 and SeB15C5,especially by SeB15C5,are much larger than those by TeB15C5.SB15C5 and SeB15C5 show a very high transportselectivity for Ag+ over Na+,K+ and Pb2+,and can be used to separate and recover noblemetals such as silver.

Key words: Crown ether, Thiacrown ether, Selenacrown ether, Telluracrown ether, Liquidmembrane transport

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