A photoluminescent second-order nonlinear optical molecular crystal with cold crystallization

Abstract

Cold crystallization occurs commonly in polymers but is rarely found in small molecular crystals. Here, we report the first photoluminescent second-order nonlinear optical molecular crystal with cold crystallization, which shows crystallization upon heating at 358 K as well as green photoluminescence emission and strong second harmonic generation response with intensity comparable to that of KH₂PO₄.