Bi(III) I-Complexes of Porphyrins for Biomedicine: Synthesis and Spectral-Optical Properties

Abstract

Bismuth complexes of porphyrins are of interest for IR luminescence diagnostics of cancer, since rather intense emission bands in the range of 800–920 nm have been found. In connection with the COVID-19 pandemic, bismuth compounds are also of interest in the treatment of coronavirus infection. Bismuth complexes of porphyrins of various spatial configurations have been synthesized, and several spectral-optical properties have been investigated. The influence of various substituents on the spectral characteristics was evaluated by methods of studying electronic absorption spectra, luminescence spectra, IR-, and 1H NMR spectroscopy.