Surfactants directly participate in the molecular recognition for visual and sensitive detection of fentanyl

十二烷基硫酸钠 检出限 化学 肺表面活性物质 分子识别 色谱法 吸附 分析物 胶束 分子 有机化学 水溶液 生物化学
作者
Ying Lin,Jiefang Sun,Xinyue Xiang,Haili Yu,Bing Shao,Yi He
出处
期刊:Sensors and Actuators B-chemical [Elsevier BV]
卷期号:354: 131215-131215 被引量:9
标识
DOI:10.1016/j.snb.2021.131215
摘要

Surfactants that are organized self-assembly to form micelles have been widely utilized for detection of several analytes. However, the surfactants only provide a hydrophobic space, which does not involve the molecular recognition process. Here, we report a surfactant-involved colorimetric assay for visual and sensitive detection of fentanyl (FTN), a third-generation new psychoactive substance. It is found that sodium dodecyl sulfate (SDS) simultaneously enhance the halogen-bonding interaction between Rose Bengal (RB) as the probe and FTN as well as stabilize the RB-FTN complex. This molecular recognition induces the intermolecular charge transfer, generating a significant redshift in the absorption band of RB and accompanying a distinct color change from red to purple. This assay possesses an ultrahigh response speed (within 1 min), and the limit of detection is calculated to be as low as 0.1 mg·L−1. It also shows good selectivity and application potential. The recovery rates of real samples are between 92.5% and 110%, suggesting that it is suitable for rapid and accurate analysis of food samples such as mineral water, orange juice and cocktail. The current strategy can be further exploited in surfactant enhanced detection applications for other substances.
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