Magnetism in organic materials

Neutral mono-, di- and tri-radical solids and radical cation salts were used to study the variation of intra- and inter-molecular exchange interaction with molecular packing and systematic molecular modifications. Cooperative magnetic behaviour related to localized manganese moments was characterized for manganese oxides as a composite in organic matrix or charge transfer salts of tetra-substituted porphinato manganese. Magnetic order was also observed in 1,3-dithienyl-5-phenyl-verdazyl electropolymerized with hexafluorophosphate as counterion.