Magnetic metal complexes are a kind of magnetic compounds formed by combining paramagnetic ions and diamagnetic ligands by means of spontaneous assembly and controlled assembly. The paramagnetic ions can be transition metal ions or rare earth metal ions. The magnetism of magnetic metal complexes is related to the paramagnetic center with unpaired electrons, and the paramagnetic center can produce isolation or synergistic action in a coordination chemical environment. By studying the spin state of the isolated paramagnetic ions in the ligand field, the transition between high and low spin states can be realized. Furthermore, by studying the synergistic behavior between spins, the magnetic coupling effect and magnetic ordered temperature can be adjusted, so as to obtain various materials with different magnetic properties.
Magnetic metal complexes are easily modified and can be tailored at the molecular level by chemical methods. Other functional groups can be grafted onto magnetic metal complexes to enable them to have two or more functions, which greatly extends their applications. Multifunctional magnetic metal complexes, such as electric-magnetic materials, optically magnetic materials, chiral and microporous magnetic materials, can be obtained by combining the magnetism with electrical, light or other properties. Magnetic metal complexes have a broad application prospect in energy storage areas, recording materials with high storage density and others.
Figure 1. The perspective views of the designed material.
Figure 2. Structure of the ITQMOF-2 material.
According to the coordination of metal ions, magnetic metal complexes can be divided into Mn cluster, Fe cluster, Co cluster, Ni, cluster, V cluster and the others.
Magnetic metal complexes are usually synthesized by supramolecular means, utilizing non-covalent bonding forces, such as van der Waals forces and hydrogen bonds.
Bogdan V, Harbuzaru, Avelino, et al. Metal–Organic Nanoporous Structures with Anisotropic Photoluminescence and Magnetic Properties and Their Use as Sensors[J]. Angewandte Chemie International Edition, 2008,47,1080-1083.