Citation: Xueru Zhao, Aopu Wang, Shimin Wang, Zhijie Song, Li Ma, Li Shao. Adsorption and visual detection of nitro explosives by pillar[n]arenes-based host–guest interactions[J]. Chinese Chemical Letters, ;2025, 36(4): 110205. doi: 10.1016/j.cclet.2024.110205 shu

Adsorption and visual detection of nitro explosives by pillar[n]arenes-based host–guest interactions

Xueru Zhao ^a ,
Aopu Wang ^a ,
Shimin Wang ^a ,
Zhijie Song ^a ,
Li Ma ^c ,
Li Shao ^{a, b, *,}

a.
Department of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
b.
Zhejiang Provincial Innovation Center of Advanced Textile Technology, Shaoxing 312000, China
c.
Department of Chemistry, University of Missouri, Columbia, Missouri 65211, United States

lishao@zstu.edu.cn

Received Date: 29 February 2024
Revised Date: 26 June 2024
Accepted Date: 2 July 2024
Available Online: 2 July 2024

Figures(7)

Aromatic nitro compounds present substantial health and environmental concerns due to their toxic nature and potential explosive properties. Consequently, the development of host–guest molecular recognition systems for these compounds serves a dual-purpose: enabling the fabrication of high-performance sensors for detection and guiding the design of efficient adsorbents for environmental remediation. This study investigated the host–guest recognition behavior of perethylated pillar[n]arenes toward two aromatic nitro molecules, 1-chloro-2,4-dinitrobenzene and picric acid. Various techniques including ¹H NMR, 2D NOESY NMR, and UV-vis spectroscopy were employed to explore the binding behavior between pillararenes and aromatic nitro guests in solution. Moreover, valuable single crystal structures were obtained to elucidate the distinct solid-state assembly behaviors of these guests with different pillararenes. The assembled solid-state supramolecular structures observed encompassed a 1:1 host–guest inclusion complex, an external binding complex, and an exo-wall tessellation complex. Furthermore, based on the findings from these systems, a pillararene-based test paper was developed for efficient picric acid detection, and the removal of picric acid from solution was also achieved using pillararenes powder. This research provides novel insights into the development of diverse host–guest systems toward hazardous compounds, offering potential applications in environmental protection and explosive detection domains.
- Pillar[n]arenes,
- Host–guest interactions,
- Aromatic nitro compounds,
- Adsorptive separation,
- Explosive detection
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