Fluorescence and phosphorescence spectra, quantum yields of the emissions, and phosphorescence lifetimes of Lu(III) and Gd(III) porphyrins in solutions measured at 25 degrees C and at -196 degrees C are reported. The studied species were estimated in terms of a kind of a metal ion and a porphyrin ligand towards their application in luminescence-based oxygen sensing. The obtained results suggest a possibility of utilization of Ln(III) porphyrins in the intraratiometric luminescence intensity-based oxygen sensing. It concerns a simultaneous observation of a red-coloured S-1 -> S-0 fluorescence (which is independent from both oxygen and temperature) and oxygen sensitive a near-infrared T1 -> S-0 phosphorescence emitted by the same complex. (C) 2015 Elsevier B.V. All rights reserved.