Improvement of Ethanol Catalytic Oxidation Experiment Based onAggregation- Induced Emission Fluorescent Probes
NI Xuan-Yi1, MA Teng-He1, ZHANG Li-Lei1**, ZHAO Dong-Yang2, WU Hai-Xia1
1. School of Chemistry and Chemical Engineering,Luoyang Normal University,Luoyang 471000,China; 2. Xinxiang Pingyuan New District Second Junior High School,Xinxiang 453000,China
Abstract In the high school chemistry experiment of “ethanol catalytic oxidation”,the detection of the product acetaldehyde primarily relies on subjective sniffing. Traditional improvement methods suffer from issues such as the thermal decomposition of Schiff’s reagent,which can lead to false-positive results. This study designs and synthesizes a 5-(methoxycarbonyl)salicylaldehyde hydrazone probe that exhibits a specific response to acetaldehyde. The probe reacts with acetaldehyde to form 5-(methoxycarbonyl)salicylaldehyde acetaldehyde hydrazone,which possesses aggregation-induced emission (AIE) properties,enabling highly sensitive,selective,and real-time visual detection of acetaldehyde in the reaction system. This method allows for the visual observation of fluorescence changes under a portable ultraviolet lamp,offering distinct phenomena and simple operation. It effectively overcomes the limitations of traditional detection methods,which are often non-intuitive and prone to false positives. This improvement not only enhances the inquiry-based and scientific nature of the ethanol catalytic oxidation experiment but also integrates China’s original cutting-edge knowledge of AIE. By strengthening students’ evidence-based awareness and scientific thinking,it fosters their confidence in science and technology as well as national pride. This study provides an innovative example for high school chemistry experiment teaching,characterized by visualization,evidence-based practices,and educational value.
NI Xuan-Yi, MA Teng-He, ZHANG Li-Lei, ZHAO Dong-Yang, WU Hai-Xia. Improvement of Ethanol Catalytic Oxidation Experiment Based onAggregation- Induced Emission Fluorescent Probes[J]. Chinese Journal of Chemical Education, 2026, 47(17): 93-100.
