Xiong Ya, Yang Weiqiang, Huang Shengxiu, Chen Xiaoping, Wang Qingxiang, Ni Jiancong, Lin Zhenyu
Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology, Fujian Provincial Key Laboratory of Pollution Monitoring and Control, College of Chemistry, Chemical Engineering and Environment, Minnan Normal University, 36 Xianqian Street, Zhangzhou, 363000, Fujian, China.
MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, 350116, China.
Mikrochim Acta. 2023 Oct 4;190(11):426. doi: 10.1007/s00604-023-06007-3.
Metal-organic gels (MOGs) emerged as an attractive luminescent soft material for electrochemiluminescence (ECL). In this work, a cathodic ECL-activated europium metal-organic gel (Eu-MOG) has been synthesized by a facile mixing of Eu with 4'-(4-carboxyphenyl)-2,2':6',2''-terpyridine (Hcptpy) under mild conditions. The prepared Eu-MOG is highly mesoporous for co-reactant permeation to produce an ultra-stable and high-efficient ECL, based on the antenna effect of Eu coordinating with Hcptpy. Moreover, dipicolinic acid (DPA) can competitively coordinate with Eu instead of water molecules, producing an enhanced ECL signal. Therefore, an ECL enhancement assay was developed for DPA detection. There was a linear relationship between the ECL intensity and the logarithmic concentration of DPA in the 0.01-1 μM range, and the detection limit is 7.35 nM. This work displays the promising application of Eu-MOG in the ECL field, opening a broad inspection for seeking a new generation of ECL luminophores.
金属有机凝胶（MOGs）作为一种用于电化学发光（ECL）的有吸引力的发光软材料而出现。在这项工作中，通过在温和条件下将铕与4'-(4-羧基苯基)-2,2':6',2''-三联吡啶（Hcptpy）简单混合，合成了一种阴极ECL激活的铕金属有机凝胶（Eu-MOG）。基于铕与Hcptpy的天线效应，制备的Eu-MOG具有高度介孔结构，有利于共反应物渗透，从而产生超稳定且高效的ECL。此外，二吡啶甲酸（DPA）可以与铕竞争性配位，取代水分子，产生增强的ECL信号。因此，开发了一种用于检测DPA的ECL增强检测方法。在0.01 - 1 μM范围内，ECL强度与DPA的对数浓度之间存在线性关系，检测限为7.35 nM。这项工作展示了Eu-MOG在ECL领域的广阔应用前景，为寻找新一代ECL发光体开辟了广阔的研究空间。
