Electronic absorption spectrum of monoamine tetraphenylporphyrin with the complexon of ethylenediaminetetraacetic acid as substitute

► In the framework of density functional theory the equilibrium geometry of the ground electronic state of monoamine tetraphenylporphyrin with the complexon of ethylenediaminetetraacetic acid. ► Electronic absorption spectrum of this molecule in ethanol solution was measured in the range of 300-600 nm and interpreted using the PCM/TDDFT method. ► The observed and calculated band positions and intensities are well agreed.