Synthesis and characterization of eight new tetraphenylporphyrins bearing one or two ferrocenes on the β-pyrrole positions

One or two ferrocenes were linked to the beta-pyrrole positions of the free base TPP or its zinc complex through an ethynyl or ethynylenephenylene group using a modification of the Sonogashira method. All the compounds were characterized using UV-vis, FAB-mass and NMR spectroscopy and cyclic voltammetry.