Enhanced Emission in Organic Nanocrystals via Asymmetrical Design of Spirocyclic Aromatic Hydrocarbons

Two spirocyclic aromatic hydrocarbon derivatives were prepared to clarify the molecular geometry’ effects on regulating the crystalline morphologies and photophysical behaviors of organic microcrystals. Due to the different structural symmtery of spiro-center, distinguishing nanocrystal morphology with unique crystallization-enhanced/quenched emission were realized.