Red aqueous room-temperature phosphorescence modulated by anion-π and intermolecular electronic coupling interactions.

ABSTRACT: Aqueous room temperature phosphorescence (aRTP) from purely organic materials has been intriguing but challenging. In this article, we demonstrated that the red aRTP emission of 2Br-NDI, a water-soluble 4,9-dibromonaphthalene diimide derivative as a chloride salt, could be modulated by anion-π and intermolecular electronic coupling interactions in water. Specifically, the rarely reported stabilization of anion-π interactions in water between Cl^- and the 2Br-NDI core was experimentally evidenced by an anion-π induced long-lived emission (λ _Anion-π) of 2Br-NDI, acting as a competitive decay pathway against the intrinsic red aRTP emission (λ _Phos) of 2Br-NDI. In the initial expectation of enhancing the aRTP of 2Br-NDI by inclusion complexation wi

SUBMITTER: Liu F 

PROVIDER: S-EPMC9214877 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature