One, Two Three – Phosphaalkene Decoration Tailoring Solubility and Electronic Properties of Truxene‐Based Electron Acceptors

Abstract

AbstractWe report the functionalization and deplanarization of truxenes using pnictaalkene fragments. Selective introduction of one, two, or three Mes*‐Pn fragments provides up to three fully reversible reductions based on the Pn=C fragments. The incorporation of the unsaturated heteroelement fragment as well as the contortion of the truxene core result in significantly red‐shifted absorption spectra and interesting opto‐electronic properties which are studied by electrochemistry and spectro‐electrochemistry. Incorporation of arsaalkene (As=C) motifs gives significantly milder reduction potentials and red‐shifted absorption, while phosphaalkene decorated truxene P3 can be functionalized using Au(I)Cl coordination. Furthermore, solubility is markedly increased upon incorporation of the Pn‐Mes* fragments which renders these materials suitable for solution processing.