Sina Sabury, Zhuang Xu, Shamil Saiev, Daniel Davies, Anna M Österholm, Joshua M Rinehart, Motahhare Mirhosseini, Benedict Tong, Sanggyun Kim, Juan-Pablo Correa-Baena, Veaceslav Coropceanu, Oana D Jurchescu, Jean-Luc Brédas, Ying Diao, John R Reynolds
Controlling the multi-level assembly and morphological properties of conjugated polymers through structural manipulation has contributed significantly to the advancement of organic electronics. In this work, a redox active conjugated polymer, TPT-TT, composed of alternating 1,4-(2-thienyl)-2,5-dialkoxyphenylene (TPT) and thienothiophene (TT) units is reported with non-covalent intramolecular S⋯O and S⋯H-C interactions that induce controlled main-chain planarity and solid-state order. As confirmed by density functional theory (DFT) calculations, these intramolecular interactions influence the main chain conformation, promoting backbone planarization, while still allowing dihedral rotations at higher kinetic energies (higher temperature), and give rise to temperature-dependent aggregation properties...
April 30, 2024: Materials Horizons