fluorescence thermometer based on porphyrin was described in work:
Dmitrieva O. A., Mamardashvili N. Z. Porphyrin dimer as efficient optical thermometer: Experimental and computational evaluation of the barrier to torsional rotation. Journal of Luminescence. 2021. 235. 117986. DOI: 10.1016/j.jlumin.2021.117986.