Journal Article

Conjugated polymers, such as conjugated porous polymers, covalent organic frameworks, covalent triazine frameworks, and linear conjugated polymers comprising thiazolo[5,4-d]thiazole (TzTz) moieties, have been demonstrated as a promising new class of materials for various applications. These include photocatalytic water splitting, hydrogen peroxide production, carbon dioxide reduction, degradation of pollutants, photocatalytic organic transformations, organic light-emitting diodes, organic field-effect transistors, organic solar cells, Zn-air batteries, electrochromic devices, photocatalytic enzyme activity, carbon dioxide uptake, and nonlinear optical applications. Remarkably, the introduction of rigid, planar, and electron-withdrawing TzTz building blocks in polymeric architectures enhances their light-harvesting ability, the separation and mobility of charge carriers, favorable energy level alignments, and surface properties due to the extension of π-conjugated structures, strong intermolecular π-π stacking, and high oxidative stability. Considering the intriguing applications of TzTz-based conjugated polymers in the above-mentioned areas, this review comprehensively discusses how the structure-activity relationship can advance these applications. To our knowledge, no review has yet summarized the structure-optoelectronic, morphological, and thermal property relationships and applications of TzTz-based conjugated polymers. Hence, this review will be helpful in designing more efficient TzTz-based conjugated polymers for various future applications.