Citation: Shuzhan Chen, Yi Shi, Huayang Liang, Huamiao Lin, Peng Geng, Dan Luo, Haichuang Lan, Shuzhang Xiao. Halogen effect on non-conventional organogel with controlled ultra-long room temperature phosphorescence and fast-response[J]. Chinese Journal of Structural Chemistry, ;2026, 45(7): 100919. doi: 10.1016/j.cjsc.2026.100919 shu

Halogen effect on non-conventional organogel with controlled ultra-long room temperature phosphorescence and fast-response

Supramolecular gels exhibiting ultra-long organic room temperature phosphorescence (RTP) are highly sensitive to external stimuli and show great potential for dynamic anti-counterfeiting applications. While our previous work successfully developed several supramolecular organogels with ultra-long RTP properties, their phosphorescence quantum yields remained relatively low, likely due to comparatively weak intermolecular interactions. In this study, two novel halogen-functionalized ultralong RTP organogelator (m-ClPBCM and m-BrPBCM) were designed and synthesized. The introduction of halogen bonding not only preserves the gelation capability but also enhances the phosphorescence quantum yield. Especially, the m-BrPBCM gel exhibits the highest phosphorescence quantum yield (2.12%, surpassing m-ClPBCM at 1.7% and exceeding the non-brominated m-PBCM by more than eightfold), with a lifetime reaching 203.8 ms. Moreover, both wet and dry m-BrPBCM gels display reversible phosphorescence switching upon rapid heating and cooling, demonstrating second-scale stimuli-responsive performance. This work provides promising candidates for dynamic anti-counterfeiting applications.
- Room-temperature phosphorescence,
- Non-conventional organogel,
- Halogen bonding,
- Stimuli-responsive,
- Dynamic anti-counterfeiting
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