Naphthalimide-Based Triptycenes: Synthesis and Optoelectronic Properties

In the past decades, the naphthalimide structure has found application in many areas of chemistry due to its unique photophysical properties. Naphthalimide has two isomers, 1,8-naphthalimide containing a six-membered imide ring and 2,3-naphthalimide containing a five-membered imide ring. The former has been widely investigated while studies on the latter are considerably more rare. On the other hand, naphthalimide can also be regarded as a building block to construct polycyclic aromatic hydrocarbons (PAHs), which have found wide applications in optical materials. Here we report the synthesis and optoelectronic properties of three 2,3-naphthalimide-based triptycenes. These three triptycene derivatives enrich the family of triptycenes.