Citation: Ting Zhang, Jia Chen, Mingxia Sun, Juanjuan Wang, Lulu Wang, Shuzhe Guan, Hongdeng Qiu. Bis-trimethylammonium pillar[5]arene and biphenyldisulfonic acid-based ionic pair assembled single crystals for iodine adsorption[J]. Chinese Chemical Letters, ;2026, 37(5): 111790. doi: 10.1016/j.cclet.2025.111790 shu

Bis-trimethylammonium pillar[5]arene and biphenyldisulfonic acid-based ionic pair assembled single crystals for iodine adsorption

Ting Zhang ^{a, b} ,
Jia Chen ^b ,
Mingxia Sun ^b ,
Juanjuan Wang ^b ,
Lulu Wang ^{a, *,} ,
Shuzhe Guan ^{a, *,} ,
Hongdeng Qiu ^{b, c, *,}

a.
State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, China
b.
CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
c.
Key Laboratory of Rare Earths, Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China

006785@xju.edu.cn.com

254425698@qq.com

hdqiu@licp.cas.cn

Received Date: 5 March 2025
Revised Date: 5 July 2025
Accepted Date: 4 September 2025
Available Online: 7 September 2025

Figures(4)

In this work, bis-trimethylammonium pillar[5]arene (TP5) was synthesized for ionic pair assembly with 4,4′-biphenyldisulfonic acid (BA) to prepare a new kind of ionic single crystals (TP5-BA). The single crystal structure revealed that TP5-BA adopted an ordered cross-stacked arrangement under the combined influence of electrostatic interactions and π-π stacking forces. It is worth noting that TP5-BA exhibited exceptional performance in the adsorption of iodine vapor, with an adsorption capacity as high as 3.27 g/g. After 6 days, its retention rate remained at a high level of 99.71%. This finding may open up a new direction in supramolecular chemistry with ionic pair self-assembly, not only for the development of novel iodine adsorbent materials but also for many other potential applications such as catalysis and energy.
- Ionic self-assembly,
- Pillar[5]arene,
- Ionic single crystals,
- Iodine adsorption,
- Supramolecular chemistry
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