PORPHYRIN-BASED DIRADICALOIDS

ZHANG HEJIAN

Publication

PORPHYRIN-BASED DIRADICALOIDS

ZHANG HEJIAN

Abstract

Porphyrins are composed of four pyrrole subunits connected in a coplanar conformation at their α carbon atoms through methine bridges. Numerous attractive properties are revealed from porphyrin systems like aromaticity/nonaromaticity, great metal affinity and small band gap, which gives them potential applications in a wide range such as molecular electronics, supramolecular assembly, photodynamic therapy and so on. Recently, stable and isolable biradicaloids are appealing molecules owing to their unique electronic properties and potential applications in molecular electronics, nonlinear optical materials and spintronics. Efforts have been devoted to exploring novel molecular motifs that can realize stable biradicaloids. Effective conjugated network and structure flexibilities of porphyrins make them excellent platform for stable radicals. General strategies for producing porphyrin-based diradicaloids involve quinoidal porphyrins or fusing porphyrin with proaromatic units. In this thesis, we will explore novel porphyrin-based diradicaloids via new design of quinoidal porphyrin and appropriate incorporation of proaromatic units into porphyrin.