Sign Inversion of Circularly Polarized Luminescence in Cholesteric Liquid Crystals Induced by Mercury Ions through Binaphthyl Dopants′ Conjugation Control
Stimuli-responsive circularly polarized luminescence (CPL) materials based on cholesteric liquid crystal (CLC) platforms show great promise for applications in information encryption and anticounterfeiting. In this study, we constructed a mercury ion-responsive CPL system in CLCs by controlling the conjugation degree of axially chiral binaphthyl derivatives. Two chiral binaphthyl derivatives (R/S-1 and R/S-2) were initially used as chiral dopants to demonstrate that CPL inversion (g<sub>lum</sub> values from 0.5/-0.44 to -0.53/0.48) in CLCs could be achieved by modulating the conjugation degree of the chiral binaphthyls. Based on this concept, the thioacetal binaphthyl R-2S was developed and used as a mercury-responsive chiral dopant in CLCs. Under Hg ion treatment, the CPL sign inverted (g<sub>lum</sub> value changed from 0.22 to -0.29) due to the transformation of the thioacetal into an aldehyde group. Additionally, the mercury ion-responsive CPL material was applied in information encryption.
Authors
- Yang Li (ORCID: https://orcid.org/0009-0006-2912-9635)
- Peiting Jiang
- Lulu Li (ORCID: https://orcid.org/0000-0002-7790-090X)
- Xueyan Zhang (ORCID: https://orcid.org/0000-0003-0056-6293)
Institutions
- Chinese Academy of Sciences (CN)
- Jiangsu University of Science and Technology (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Angewandte Chemie International Edition
- Published
- 2024-09-16
- DOI
- https://doi.org/10.1002/anie.202417149
- Citations
- 23
- Primary Topic
- Liquid Crystal Research Advancements
- Type
- article
- Field-Weighted Citation Impact
- 2.71
Funders
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation