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Rhodamine-naphthalimide demonstrated a distinct aggregation-induced emission mechanism: elimination of dark-states via dimer interactions (EDDI)
- Qi, Qingkai, Huang, Lu, Yang, Runqing, Li, Jin, Qiao, Qinglong, Xu, Bin, Tian, Wenjing, Liu, Xiaogang, Xu, Zhaochao
- Chemical communications 2019 v.55 no.10 pp. 1446-1449
- chemical communication, chemical interactions, chemical reactions, fluorescence, rhodamines
- Rhodamine B-naphthalimide (RhB-Naph) demonstrated a distinct aggregation-induced emission (AIE) mechanism, different from the restriction of intramolecular rotations or vibrations as in traditional AIE molecules. The monomers of RhB-Naph were non-emissive, due to the presence of a dark S₁ state. Upon molecular aggregation, intermolecular interactions significantly altered the electronic properties of RhB-Naph, leading to the formation of a bright S₁ state and endowing RhB-Naph with notable AIE properties. Besides, we demonstrated that RhB-Naph enabled the development of a solid-state three-color fluorescent switch upon multi-external stimuli.