Synthesis and Magnetic Properties of a Metallacryptate that Behaves as a Single‐Molecule Magnet

Abstract

Metallamacrocyles have been intensively studied over the past decade. These molecules have already been used in applications as diverse as catalysis, Metallamacrocyles include complexes such as metallacrowns, [3, 4] molecular squares, Metallacrowns (MC), the inorganic structural and functional analogs to crown ethers, are usually formed with transition-metal ions incorporated into the metallamacrocyclic ring, thus providing the attractive feature that they concentrate a large number of metal ions per unit volume. This large metal-ion concentration may lead to interesting magnetic behavior. [4, nce the recognition of single-molecule magnets (SMMs) in 1993, the field has gained considerable attention as a study of both classical and quantum effects. [8, MMs of cobalt, However, the best known and most intensely studied SMMs are the manganese carboxlyate clusters, which range in size from Mn 4 to Mn 30 . [15] Herein we report the synthesis (Scheme 1) and characterization of the second