A Photoswitchable and Photoluminescent Organic Semiconductor Based On Cation-π and Carboxylate-Pyridinium Interactions: A Supramolecular Approach

摘要

The design and discovery of novel organic electronic materials still poses a major challenge owing to their utility in field-effect transistors memory devices solar cells, light-emitting diodes, displays, and plastic electronics. The organic materials are of interest for designing electronics because of their easy fabrication, modulation capabilities, and cost-effectiveness. Several polyaromatic materials, such as tetracene, pentacene, perylene, and rubrene, were shown to be semiconductors owing to the existence of aromatic-aromatic interactions. Studies on tetrathaiafulvalene (TTF), which is a prototypical organic semiconductor, reveal the increase in charge mobility when TTF molecules are assembled through face-to-face aromatic interactions. Furthermore, TTF and tetracyanoquinodimethane (TCNQ) are known to form strong charge-transfer complexes and exhibit metallic conductance. Similarly, donor-acceptor charge-transfer (CT) complexes of TTF-imidazole with TCNQ, p-benzoquinone, and anilic acid-type acceptors exhibit a number of conducting and semiconducting materials. Despite of these potential examples based on charge-transfer interactions, very few attempts have been made to design new molecular organic semiconductors using crystal engineering strategies.