Synthesis of dendritic iron(II) porphyrins with a tethered axial imidazoleligand designed as new model compounds for globins

A series of novel dendritic iron(II) porphyrins with an axial imidazole lig and attached to the central porphyrin core was synthesised and fully charac terised. The vacancy of the second axial coordination site was demonstrated by their ability to coordinate the diatomic gas molecules CO, O-2 and NO. The formation of NO complexes by dendritic iron(II) porphyrins was observed for the first time.