Oxidation of Ethyl Ether on Borate Glass: Chemiluminescence, Mechanism, and Development of a Sensitive Gas Sensor

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• 作者：Jing Hu ; Kailai Xu ; Yunzhen Jia ; Yi Lv ; Yubao Li ; Xiandeng Hou
• 刊名：Analytical Chemistry
• 出版年：2008
• 出版时间：November 1, 2008
• 年：2008
• 卷：80
• 期：21
• 页码：7964-7969
• 全文大小：209K
• 年卷期：v.80,no.21(November 1, 2008)
• ISSN：1520-6882

文摘

A gas sensor was developed by using the chemiluminescence (CL) emission from the oxidation of ethyl ether by oxygen in the air on the surface of borate glass. Theoretical calculation, together with experimental investigation, revealed the main CL reactions: ethyl ether is first oxidized to acetaldehyde and then to acetic acid, during which main luminous intermediates such as CH₃CO^• are generated and emit light with a peak at 493 nm. At a reaction temperature of 245 °C, the overall maximal emission was found at around 460 nm, and the linear range of the CL intensity versus the concentration of ethyl ether was 0.12−51.7 μg mL⁻¹ (R = 0.999, n = 7) with a limit of detection (3σ) of 0.04 μg mL⁻¹. Interference from foreign substances including alcohol (methanol, ethanol and isopropanol), acetone, ethyl acetate, n-hexane, cyclohexane, dichloromethane, or ether (n-butyl ether, tetrahydrofuran, propylene oxide, isopropyl ether and methyl tert-butyl ether) was not significant except a minimal signal from n-butyl ether (<2%). It is a simple, sensitive and selective gas sensor for the determination of trace ethyl ether.