Synthesis, aromaticity, charge transport in OFET devices and nonlinear optical properties of tetrathia/oxa[22]porphyrin(2.1.2.1)s: a decade of progress

Abstract

Distinctive physicochemical characteristics, aromaticity–antiaromaticity relations, electrochemistry, charge transport in organic-field effect transistor devices (thin films and single crystals), supramolecular donor–acceptor dyads, photoresponsivity, and linear and nonlinear optical behaviour (2nd and 3rd-order) of rather under-appreciated classes of meso-substituted tetrathia/oxa[22]porphyrin(2.1.2.1)s explored by our group await further exploration to open new possibilities in organic electronics. This personal account discusses the above attributes including the structure dependent p-channel and ambipolar charge transport in tetrathia/oxa[22]porphyrin(2.1.2.1)s and their donor–acceptor dyads with tetracyanoethylene and C₆₀/C₇₀ fullerenes, respectively. Also we discuss the reverse saturation absorption, two-photon absorption and third-order nonlinear polarizability of tetrathia[22]porphyrin(2.1.2.1)s.