Poly(thiophene iminoborane): A Poly(thiophene vinylene) (PTV) Analogue with a Fully BN‐Doped Backbone Article Swipe

PDF

Related Concepts

Thiophene Bathochromic shift Conjugated system Materials science Polymer Polymer chemistry Condensation polymer Dispersity Derivative (finance) Chemistry Organic chemistry Fluorescence Physics Financial economics Quantum mechanics Economics Composite material

Johannes Chorbacher , Matthias Maier , Jonas Klopf , Maximilian Fest , Holger Helten ·

YOU? · · 2023 · Open Access · · DOI: https://doi.org/10.1002/marc.202300278 · OA: W4379093455

An unprecedented poly(thiophene iminoborane)—a boron–nitrogen analogue of the well‐established conjugated organic polymer poly(thiophene vinylene)—is presented. The polymer synthesis is achieved by selective Si/B exchange polycondensation of a 2,5‐diborylthiophene with a 2,5‐diaminothiophene derivative. For the latter, a facile synthetic strategy is devised, which makes this versatile, strongly electron‐releasing building block easily accessible. The novel polymer and a series of monodisperse thiophene iminoborane oligomers reveal systematic bathochromic shifts in their absorption with increasing chain length, and thus extended π ‐conjugation over the BN units along the backbone, which is further supported by TD‐DFT calculations.