Metallo-tetrapyrroles (MTP) are highly stable macrocyclic ?-systems that display interesting properties that make them potential candidates for various applications. Among these applications are optoelectronics, magnetic materials, photoconductive materials, non-linear optical materials and photo tumor therapeutic drugs. These applications are generally related to their high stability and efficient light absorption ability in the visible and near-infrared region of the optical spectrum. Metallo porphyrins are well known and widely studied representatives of metallotetrapyrroles. A new technique has been employed to study the photophysical properties of zinc (II) tetraphenylporphine cation radical, which has been formed electrochemically in situ and studied by means of femtosecond absorption spectrometry to prove that this new technique could be used to elucidate the photophysical behavior of open shell species. This work should help some researchers studiyng molecular behavior by means of ultrafast spectroscopy, and also theorectical chimists employing computational methods of investigation.