Synthesis of new porphyrin dimers linked by diamines and their supramolecular assemblies

For the first time the bisporphyrins connected via diamine bridges were synthesized by palladium catalyzed Buchwald-Hartwig amination reaction with high yields. The diamine bridges include linear, cyclic and macrocyclic types. Homo- and heteronuclear metallocomplexes of bisporphyrins were investigated with UV-vis spectroscopy in the processes of supramolecular assembly. The interaction with diazabicyclo[2.2.2] octane (DABCO) and cesium and diammonium cations led to the coordination dimers. Control of the conformation of the bisporphyrin was realized via coordination of diamine moiety with copper cation.