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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引用次数: 0
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.
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.