The Preparation and Studies on Luminescent Properties of Novel Cocrystal(E)-9-STAN∶TCNB
In order to investigate the relationship between cocrystal structures and their properties,an an-thracene derivative(E)-9-STAN was synthesized,and then cocrystal(E)-9-STAN∶TCNB was pre-pared by slow solvent evaporation method with TCNB.The detailed analysis and characteristic were car-ried out by X-ray single crystal diffraction,steady state and transient fluorescence spectra and theoretical calculations.The structure studies indicate that(E)-9-STAN∶TCNB cocrystal displays mixed stacking mode(…ABABA…),and there are multiple strong intermolecular C—H…N and C—H…O hydrogen bonding interactions between molecules stabilize the crystal configuration.Interestingly,compared with blue light-emitting anthracene crystal,green light-emitting(E)-9-STAN crystal and orange light-e-mitting anthracene:TCNB cocrystal,(E)-9-STAN∶TCNB cocrystal exhibits obvious redshift with red emission,depending on strong intermolecular charge transfer interactions caused by its special molecular structures in which(E)-9-STAN as donor and TCNB as acceptor.This research provides a new oppor-tunity for the design of novel organic red light-emitting cocrystal materials.
organic cocrystalluminescent propertiescharge transfer interactioncrystal structure
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