Citation: Shuai Qiu, Jia Tang, Wan Xu, Zhiying Ma, Chao Zhang, Sheng Zhang, Chunli Li, Wei Tian, Hua Wang. Fluoride-induced sign inversion of circularly polarized luminescence of B,N-thia[8]helicene[J]. Chinese Chemical Letters, ;2026, 37(6): 111778. doi: 10.1016/j.cclet.2025.111778 shu

Fluoride-induced sign inversion of circularly polarized luminescence of B,N-thia[8]helicene

Shuai Qiu ^{a, 1} ,
Jia Tang ^{a, 1} ,
Wan Xu ^a ,
Zhiying Ma ^{a, *,} ,
Chao Zhang ^a ,
Sheng Zhang ^{a, *,} ,
Chunli Li ^a ,
Wei Tian ^{b, *,} ,
Hua Wang ^{a, *,}

a.
Institute of Nanoscience and Engineering, Henan University, Kaifeng 475004, China
b.
Shaanxi Key Laboratory of Macromolecular Science and Technology, Xi'an Key Laboratory of Hybrid Luminescent Materials and Photonic Device, MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China

mzy11@henu.edu.cn

zhang.sheng.2022@henu.edu.cn

happytw_3000@nwpu.edu.cn

hwang@henu.edu.cn

Received Date: 7 May 2025
Revised Date: 6 August 2025
Accepted Date: 30 August 2025
Available Online: 31 August 2025

Figures(5)

A novel thia[8]helicene (BN[8]H) with B, N heteroatoms incorporated in the molecular skeleton was synthesized via Suzuki coupling reaction and intramolecular direct electrophilic C-H borylation. Its helical structure was confirmed by X-ray crystal analysis. Enantiomers BN[8]H showed the interesting responses to fluoride ion stimulation with novel sign inversion of electronic circular dichroism (ECD) and circularly polarized luminescence (CPL). TD-DFT calculations revealed that the fluoride ions significant influence the transition dipole moments and θ_u,m, resulting in circularly polarized luminescence reversal.
- Helicene,
- Circularly polarized luminescence,
- Sign inversion,
- Fluoride ions
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