1,3-DIALKOXYCALIX[4]ARENECROWNS-6 IN 1,3-ALTERNATE CONFORMATION - CESIUM-SELECTIVE LIGANDS THAT EXPLOIT CATION-ARENE INTERACTIONS

被引：360

作者：

UNGARO, R

CASNATI, A

UGOZZOLI, F

POCHINI, A

DOZOL, JF

HILL, C

ROUQUETTE, H

机构：

[1] UNIV PARMA, CNR, CTR STUDIO STRUTTURIST DIFFRATTOMETR, I-43100 PARMA, ITALY

[2] UNIV PARMA, CNR, CTR STUDIO STRUTTURIST DIFFRATTOMETR, I-43100 PARMA, ITALY

[3] CEA, CTR ETUD CADARACHE, SETED, SEP, ST PAUL LES DURANCE, FRANCE

[4] UNIV PARMA, DIPARTIMENTO CHIM GEN INORGAN ANALIT CHIM FIS, PARMA, ITALY

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 1994年 / 33卷 / 14期

关键词：

D O I：

10.1002/anie.199415061

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Exceptionally high selectivity for cesium ions (α(Cs/Na) > 33000) is displayed by calix[4]arenecrowns‐6 in the 1,3‐alternate conformation. They also remove 137Cs quantitatively (>96%) from radioactive waste that is 1 M in HNO3. The complexation properties result from the simultaneous operation of several effects: the size of the crown ether ring, the polarity of the calix conformation, and the strength of the cation/π‐electron interactions. The latter interaction was evident in the X‐ray crystal structure of the cesium complex (shown on the right). (Figure Presented.) Copyright © 1994 by VCH Verlagsgesellschaft mbH, Germany

引用

页码：1506 / 1509

页数：4

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