Synthesis of carbazole derivatives and their room-temperature phosphorescence properties
Three carbazole derivatives,namely PhOCz-C3,PhOCz-C4 and PhOCz-C5,have been designed and synthesized,using different types of alkyl chains as suitable spacer groups.The aryl ketone unit was introduced onto the carbazole group to enhance the intramolecular charge transfer and spin-orbit coupling effect.PhOCz-C5 exhibits room-temperature phosphorescence property,and its arrangement in the crystal is fishbone-shaped,with strong intermolecular interactions,including C-H…O/C-H…N hydrogen bonds and C-H…π interactions.The long-range ordered aggregation can lock adjacent molecules,enhancing the rigidity of the entire crystal,which is beneficial for the generation of room-temperature phosphorescence characteristics.The results show that integrating multiple molecular design strategies to obtain room-temperature phosphorescent compounds can help us deeply understand the relationship between the stacking form and the photoelectric properties of organic compounds,and also provide new ideas for the design of stimulus-responsive materials.
room temperature phosphorescenceaggregated statepacking modestimulus response materialscarbazole derivatives
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维普
