Can Halogen Clusters be Emissive
2020
Halogen-halogen short contacts, especially halogen bonds (XBs) have been widely utilized
in multifarious fields, owing to its bridging function among luminophores as well as well-known heavy
atom effect. However, little attention has been paid to the luminescent ability of halogen clusters. It
remains unknown whether they are emissive. Herein, inspirited by the clustering-triggered emission of
nonconventional luminophores, we report the first examples of emissive halogen clusters with
fluorescence-phosphorescence dual emission in aggregated state and even under ambient conditions.
Additionally, multi-tunable PL in response to excitation wavelength, temperature, and pressure are
noticed. These results shed new lights on the underlying emission mechanism and would inspirit further
exploration of nonconventional luminophores involving halogen moieties.
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