ABSTRACT
This chapter shows how selected molecular building blocks can be combined to prepare hybrid and multifunctional molecular materials in which different physical properties coexist or are in interplay. It describes the design principles and the resulting physical properties of multifunctional molecular materials exhibiting coexistence or synergism between conductivity and magnetism. The multifunctional hybrid material shows a large magnetization hysteresis which strongly contrasts with the nearly reversible behavior of both the ferromagnet and the single-molecule magnet. Superconducting states of matter in the presence of an external magnetic field are very rarely observed because, in general, the effect of the magnetic field is to destroy the superconductivity. The selection of a magnetic building block with a two dimensional structural arrangement and an anionic nature is of crucial importance for the realization of a material coupling ferromagnetic ordering and conductivity for several reasons.
