Anion recognition properties of new upper-rim cobaltocenium calix[4]arene receptors

被引:70
作者
Beer, PD
Hesek, D
Nam, KC
Drew, MGB
机构
[1] Univ Oxford, Dept Chem, Inorgan Chem Lab, Oxford OX1 3QR, England
[2] Univ Reading, Dept Chem, Reading RG6 6AD, Berks, England
关键词
D O I
10.1021/om9904089
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
New isomeric upper-rim bis(cobaltocenium)calix[4]arene receptors L-1, L-2 and a novel upper-rim cobaltocenium-bridged calix[4]arene derivative L-3 have been synthesized and shown to selectively complex and electrochemically sense a variety of anionic guest species. Single-crystal X-ray structures of the chloride complexes of L-1 and L-3 emphasize the importance of hydrogen bonding and the topological nature of the upper-rim anion recognition site to the anion recognition process in the solid state. Proton NMR titration studies in deuterated DMSO solutions reveal these receptors form strong and remarkably selective complexes with MeCO2- and H2PO4- anions dependent upon the positioning of lower-rim tosyl substituents. Cyclic voltammetric investigations have demonstrated these receptors to electrochemically recognize carboxylate, H2PO4-, and Cl- anions.
引用
收藏
页码:3933 / 3943
页数:11
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