Synthesis and Molecular Structure of 99Tc Corroles

Abstract

The first 99Tc corroles have been synthesized and fully characterized. A single-crystal X-ray structure of a 99TcO triarylcorrole revealed nearly identical geometry parameters as the corresponding ReO structure. A significant spectral shift between the Soret maxima of TcO (410–413 nm) and ReO (438–441 nm) corroles was observed and, based on two-component spin–orbit ZORA TDDFT calculations, ascribed to relativistic effects in the Re case. The syntheses reported herein potentially pave the way toward 99mTc-porphyrinoid-based radiopharmaceuticals.