Synthesis, structure, and properties of twisted π-conjugated molecules featuring three-dimensional π–π interactions in solid states

Abstract

Thiophene-containing twisted π-conjugated molecules were synthesized by introducing methyl groups to sterically hindered positions. Three-dimensional π–π stacking was observed in the solid state, and the hole-transporting ability up to 1.85 × 10⁻⁴ cm² V⁻¹ s⁻¹ was confirmed by constructing field effect transistor devices.