Introducing flexiblealkylenebridges to distyrylbenzene can realize monomericemission in the solid state without any requirement for bulky substituents and has many potential applications, diversifying crystalstructure design and fabrication strategies.
The Wittigreaction is demonstrated as novel synthetic strategy for the synthesis of crystalline unsubstituted vinylene-linked 2D conjugated covalent organic frameworks through the attainment of high (E)-alkene selectivity. Ultrafast THz spectroscopy discloses state-of-the-art charge-transport properties of as-prepared V-2D-COFs as a result of electron delocalization in the fully conjugated frameworks