A high-efficiency and low-cost AEE polyurethane chemo-sensor for Fe3+ and explosives detection |
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Authors: | Kun Wang Hao Lu Beibei Liu Jiping Yang |
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Institution: | Key Laboratory of Aerospace Advanced Materials and Performance, Ministry of Education, School of Materials Science and Engineering, Beihang University, Beijing 100191, China |
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Abstract: | An aggregation enhanced emission (AEE) polyurethane named STMPU-211 containing 0.13% mole concentration of 4,4′-((1Z,3Z)-1,4-diphenylbuta-1,3-diene-1,4-diyl) dibenzaldehyde (TABDAA) in the soft segments was synthesized and proved to be sensitive to Fe3+ and nitroaromatic explosives. The fluorescence of the AEE polyurethane was reduced in the presence of Fe3+, and almost quenched when 5000?μM Fe3+ was added. Meanwhile, the fluorescence intensity of STMPU-211 solution in DMF/water mixture was decreased when explosives like 2,4,6-trinitrophenol (PA) and 3-nitro-1,2,4-triazol-5-one (NTO) were applied. Especially, the quenching coefficient KSV value of PA was 5.7?×?106?M?1, confirming that the polyurethane STMPU-211 could be a highly sensitive sensor for the detection of PA. Therefore, AEE polyurethanes with low concentration of TABDAA have promising applications in biological probe, environment monitoring and antiterrorism fields. |
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Keywords: | Explosives detection Aggregation-enhanced emission Polyurethane Tetraaryl-buta-1 3-diene |
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