Excessive HO content in food will cause the hydrolysis of nutrients and provide a favorable environment for the growth of mycotoxins, thus, developing fast response, low detection limit, and high detection capacity sensors is urgently needed for food quality and safety. In this work, we developed two borate-ester-based covalent organic frameworks ( and ) with high specific surface areas (1189.0 m·g and 1105.1 m·g), which exhibited rapid response ( about 40 s and about 35 s), good linearity (:R=0.9981 and :R=0.9993), and low detection limits (LOD=0.044 v/v% and LOD=0.016 v/v%). DFT theoretical calculation demonstrated that HO participated in the partial hydrolysis of the B-O bond, resulting in the enhancement of fluorescence. Based on the good fluorescence properties, these two probes had been successfully used to quantificationally detect HO content in honey, corn starch, and milk powder with satisfactory results, indicating an excellent application potential in the food field.

中文翻译：

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高比表面积硼酸酯基COF的构建用于食品领域H2O含量检测


食品中H2O含量过高会引起营养物质的水解，为霉菌毒素的生长提供有利的环境，因此食品质量安全迫切需要开发响应速度快、检测限低、检测能力高的传感器。在这项工作中，我们开发了两种基于硼酸酯的共价有机骨架（和），具有高比表面积（1189.0 m·g和1105.1 m·g），表现出快速响应（约40 s和约35 s），良好的线性 (:R=0.9981 和 :R=0.9993) 和低检测限 (LOD=0.044 v/v% 和 LOD=0.016 v/v%)。 DFT理论计算表明，H2O参与了BO键的部分水解，导致荧光增强。基于良好的荧光特性，这两种探针已成功用于定量检测蜂蜜、玉米淀粉和奶粉中的H2O含量，结果令人满意，在食品领域具有良好的应用潜力。