期刊
DYES AND PIGMENTS
卷 194, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2021.109617
关键词
Aggregation-induced emission; Hyperbranched polymers; Nitroaromatic compounds; Explosive detection
资金
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [2021R1A2C2003685]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korean government (MOTIE) [20208401010080]
- Korea Institute of Energy Technology Evaluation & Planning (KETEP) [20208401010080] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2021R1A2C2003685] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study developed a facile synthesis method for AIE-active HPGs and designed a solid-state sensor for detecting nitroaromatic explosives. The resulting AIE-active HPGs showed excellent AIE characteristics and high sensitivity towards nitro compounds by conjugating tetraphenylethylene moieties onto the periphery of the HPGs.
This work develops a facile synthesis for aggregation-induced emission (AIE)-active hyperbranched polyglycidols (HPGs) to design a solid-state sensor for detecting nitroaromatic explosives. The tetraphenylethylene moieties were conjugated onto the periphery of the HPGs in a single step using dynamic boronate ester cross-linkers. The resulting AIE-active HPGs exhibited excellent AIE characteristics in tetrahydrofuran (THF)/H2O mixtures, emitting a strong blue fluorescence under UV irradiation. Dynamic light scattering and transmission electron microscopic analyses demonstrated that the self-assembled nanosized aggregates were stable in the THF/H2O mixture. The fluorescence of the aggregates was dramatically quenched by various nitro compounds, including 2,4,6-trinitrophenol (or picric acid; PA), 2,6-dinitrophenol, 4-nitrophenol, 4-nitrotoluene, and nitromethane. The nano-aggregates exhibited extraordinary sensitivity towards PA, with a Stern-Volmer constant (Ksv) of 2.27 x 104 M-1 and a limit of detection of 40 ppb. Paper strips encapsulating the aggregates exhibited a vivid visual quenching, promising the practical applicability of these polymers as solid-state sensors for the detection of nitroaromatic explosives.
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