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A New Family of 3 d –4 f Bis‐Calix[4]arene‐Supported Clusters
Author(s) -
Coletta Marco,
McLellan Ross,
Sanz Sergio,
Gag Kevin J.,
Teat Simon J.,
Brechin Euan K.,
Dalgarno Scott J.
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201703197
Subject(s) - calixarene , chemistry , polymer science , organic chemistry , molecule
Calix[4]arenes are versatile ligands that, whilst also serving other purposes, can act as platforms for the synthesis of a wide range of 3 d , 4 f , and 3 d –4 f polymetallic clusters. The empirical metal ion binding rules established for calix[4]arene are closely mirrored by bis‐calix[4]arene, a relatively new ligand in which two equivalents of the former are directly tethered at a methylene bridge position. The direct tethering within bis‐calix[4]arene gives rise to some structural features that are related to calix[4]arene coordination chemistry, but the prevailing clusters have fascinating new topologies and coordination behaviors. Here, we present the synthesis of a family of new bis‐calix[4]arene‐supported 3 d –4 f clusters, as well as their structural characterization and magnetic properties. Comparison is drawn with calix[4]arene coordination chemistry, showing logical extension of common structural fragments and cluster capping behaviors upon moving to bis‐calix[4]arene. This approach therefore holds great potential for tuning cluster formation and composition at a high level through subsequent ligand alteration.