Interplay of Aggregation-Induced Enhanced Emission and Thermally Activated Delayed Fluorescence in Asymmetric Fluorenyl-Benzothiadiazole Derivatives.

ABSTRACT: Combining thermally activated delayed fluorescence (TADF) with aggregation-induced enhanced emission (AIEE) provides an effective strategy to improve solid-state emission in organic materials. Here, we design four fluorenyl-benzothiadiazole (FL-BTD) derivatives bearing additional donor groups, aryloxy (-OAr), aryl (-Ar), iminodibenzyl (-IDB), and phenoxazine (-PXZ), to investigate how molecular structure influences their photophysical properties. FL-BTD-OAr and FL-BTD-IDB display AIEE, with quantum yields that are significantly higher in the solid state (0.70 and 0.30, respectively) than in solution. FL-BTD-IDB also exhibits delayed emission (t _d = 1.03 μs) and enhanced luminescence under vacuum compared to an O₂ atmosphere, consistent with TADF. Organic light-

SUBMITTER: Vesga-Hernandez C 

PROVIDER: S-EPMC12856649 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature