β-Substituted ferrocenyl porphyrins: The role of the spacer and of the number of substituents on their structural and spectroscopic characteristics

Abstract

Mono and bis ethynyl and ethynylphenyl [Formula: see text]-substituted porphyrins have been synthesized and characterized. Their conformational properties have been analyzed through a combination of NMR experiments and molecular mechanic calculations, while UV-Vis absorption and fluorescence measurements together with electrochemical studies allows us to probe the existence of intramolecular electronic processes. The role of the beta-substituents and of the spacer is underlined.