Porphyrin Charge-Transfer Complexes with Sym-Trinitrobenzene

Abstract

Absorption spectra of porphyrins in solution with trinitrobenzene indicate formation of a fairly strong one-to-one charge-transfer complex. The ΔF and ΔH values are given for etioporphyrin and tetraphenylporphin; a rough ΔF value was obtained for Zn tetraphenylporphin. It was also found that trinitrobenzene strongly quenches the porphyrin fluorescence.