Calix[4]arene-Based Single-Molecule Magnets

摘要

Single-molecule magnets (SMMs)have been the subject of much interest in recent years because their molecular nature and inherent physical properties allow the crossover between classical and quantum physics to be observed. The macroscopic observation of quantum phenomena, such as tunneling between different spin states or quantum interference between tunnel paths, not only allows scientists to study quantum mechanical laws in great detail, but also provides model systems with which to investigate the possible implementation of spin-based solid state qubits and molecular spintronics. The isolation of small, simple SMMs is therefore an exciting prospect. To date, almost all SMMs have been made by the self-assembly of 3d metal ions in the presence of bridging or chelating organic ligands. However, very recently an exciting new class of SMMs based on 3d metal clusters (or single lanthanide ions) housed within polyoxo-metalates has appeared.