Influence of Ligands

The adsorption of small molecules on the metal center of 3d metal phthalocyanines alters the bonding scheme of the molecule and can induce different spin states and magnetic moments, as well as trigger more exotic effects like Kondo resonance. Soft X-ray spectroscopy studies and computational studies have highlighted this kind of effects in magnetic molecules like FePc, CoPc and MnPc by adsorption of for example CO, NO, O\(_2\) molecules.