Résumé
During the last 15 years, the synthetic modifications of porphyrins and porphyrazines have evolved rapidly. Despite this progress, the chemistry of porphyrinoids bearing coordination complexes or organometallic fragments at their periphery is still much less developed than the coordination chemistry using the apical positions of the central metal ions or remote coordination sites. The two latter types of coordination chemistry are much easier to perform from a synthetic point of view. However, transition metal-based synthetic chemistry is improving rapidly, allowing the introduction of functionalities, mainly heteroatoms or boron derivatives, at the periphery of aromatic rings. The coordination chemistry or organometallic chemistry that links together two large porphyrinoids while simultaneously allowing large electronic or magnetic interactions between these macrocycles is still limited to a few examples. The synthesis of di- or polyfunctionalized porphyrins must be developed. The inorganic chemistry around the metal ion linkages also needs to be improved and varied to give new compounds with potentially new properties. Finally, once the molecular chemistry is well understood, the chemistry of new molecular materials will need to be developed toward polymeric species.