Moisture-resistant nitroaromatic explosive gas sensor based on hydrophilic pentiptycene polymer

IF 1.7 4区 化学
Gyeongsoo Kim, Sun Bu Lee, Jaeyoung Heo, Tae Eun An, Gang Min Lee, Junggong Kim, Keunyoung Kim, Jongman Lee, Han Yong Bae, Changsik Song
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Abstract

The detection of explosive materials, particularly nitroaromatic compounds such as 2,4,6-trinitrotoluene (TNT), is critical for public safety and national security. Existing detection methods often require complex instrumentation, limiting their applicability for real-time or in-field use. Fluorescent sensors, which offer rapid and sensitive detection through fluorescence quenching, present a promising alternative. This study evaluates the performance of two pentiptycene-based polymers, P-1 and P-2, in detecting explosive vapors, with a specific focus on their behavior under high-humidity conditions. P-2, modified with triethylene glycol groups, demonstrated significantly increased hydrophilicity compared to the commonly studied P-1, as confirmed by contact angle measurements. Spectroscopic analysis revealed a blue shift in P-2's UV–Vis absorption and photoluminescence spectra, indicating electronic property changes due to structural modifications. The enhanced hydrophilicity of P-2 enabled it to maintain stable sensing performance under moist conditions, showing less than a 10% reduction in sensitivity, compared to the 20% decrease observed in P-1. This superior moisture resistance suggests that P-2 is a more robust and practical sensor for explosive detection in environments with variable humidity levels.

Abstract Image

基于亲水性戊二烯聚合物的防潮型硝基芳香族爆炸性气体传感器
爆炸材料,尤其是硝基芳香族化合物(如 2,4,6-三硝基甲苯(TNT))的检测对公共安全和国家安全至关重要。现有的检测方法通常需要复杂的仪器,限制了其实时或现场使用的适用性。荧光传感器通过荧光淬灭实现快速灵敏的检测,是一种很有前途的替代方法。本研究评估了 P-1 和 P-2 这两种基于戊二烯的聚合物在检测爆炸性蒸汽方面的性能,重点关注它们在高湿度条件下的表现。与通常研究的 P-1 相比,经三乙二醇基团修饰的 P-2 亲水性明显增强,这一点已通过接触角测量得到证实。光谱分析显示,P-2 的紫外-可见吸收光谱和光致发光光谱发生了蓝移,表明结构改性导致电子特性发生了变化。P-2 亲水性的增强使其能够在潮湿条件下保持稳定的传感性能,灵敏度降低不到 10%,而 P-1 则降低了 20%。这种优异的防潮性能表明,P-2 是一种更坚固耐用的传感器,可用于湿度变化环境中的爆炸物检测。
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来源期刊
Bulletin of the Korean Chemical Society
Bulletin of the Korean Chemical Society Chemistry-General Chemistry
自引率
23.50%
发文量
182
期刊介绍: The Bulletin of the Korean Chemical Society is an official research journal of the Korean Chemical Society. It was founded in 1980 and reaches out to the chemical community worldwide. It is strictly peer-reviewed and welcomes Accounts, Communications, Articles, and Notes written in English. The scope of the journal covers all major areas of chemistry: analytical chemistry, electrochemistry, industrial chemistry, inorganic chemistry, life-science chemistry, macromolecular chemistry, organic synthesis, non-synthetic organic chemistry, physical chemistry, and materials chemistry.
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