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精确的电子吸收强度调制ESIPT探针用于超敏感和特定光传感

Yanwen Guo¹, Zhenzhen Cai², Fei Yan²

¹School of Environment and Safety Engineering, North University of China, Taiyuan 030051, China.

Analytical chemistry

|June 1, 2023

概括

研究人员开发了新的光探针来检测 permanganate (KMnO4). 探针表现出"打开"的光反应,可通过简单的试验笔形式进行敏感和选择性检测.

科学领域:

分析化学分析化学
材料科学材料科学材料科学
化学传感器化学传感器

背景情况:

精确控制电子提取/捐赠强度对于设计基于功能反应的光探针至关重要.
激发状态的分子内质子转移 (ESIPT) 探头为敏感的检测应用提供了潜力.

研究的目的:

设计和合成基于ESIPT的新型光探针,具有对甲 (KMnO4) 的开启感应能力.
调查电子吸收组对KMnO4检测探头性能的影响.

主要方法:

一系列基于ESIPT的探头的合成,通过在识别组的对位置调节取电子的替代物 (-F, -CHO, -H).
评估探头性能,包括检测极限 (LOD),响应时间和对干扰物的选择性.
使用BOPA-CHO嵌入式海绵制造实用测试笔,用于固态KMnO4检测.

主要成果:

带有 -F, -CHO 和 -H 替代物的探测器特别识别了KMnO4,产生了蓝色排放.
带有-CHO 组 (BOPA-CHO) 的探针在反应产品中表现出最稳定的光.
博帕-乔表现出卓越的传感性能:LOD为0.96nM,响应时间为3秒,具有高选择性.
一个测试笔尺寸实现了裸眼LOD11.62 ng的固体KMnO4检测.

结论:

替代剂精确调节的电子吸收强度显著影响基于ESIPT的KMnO4.4光探针的性能.
波帕-乔探测器为KMnO4检测提供了一种高度敏感,快速和选择性的方法.
开发的探测器设计策略为创建高性能光传感器提供了新的途径.

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