Supramolecular assemblies of crown‐containing 4‐styrylpyridine in the presence of metal cations

Abstract

Abstract Optical and x‐ray experiments showed the possibility of studying 4‐styrylpyridine with a 15‐crown‐5 ether fragment to bind metal cations through the participation of two centres: the crown ether moiety and the heterocyclic part. The metal cations studied can be divided into three groups. Alkaline earth metal cations form complexes with the crown ether centre, H + , Co 2+ and Cd 2+ prefer coordination with the N‐atom of heterocyclic part and Hg 2+ cations form complexes through coordination with both binding centres. Copyright © 2005 John Wiley & Sons, Ltd.