Hu Jingqiu, Volker Bryce, Bogar Maima
West Chester University of Pennsylvania, 700 South High Street, West Chester, PA 19383, United States.
West Chester University of Pennsylvania, 700 South High Street, West Chester, PA 19383, United States.
Spectrochim Acta A Mol Biomol Spectrosc. 2025 Feb 5;326:125220. doi: 10.1016/j.saa.2024.125220. Epub 2024 Sep 26.
The photophysical properties of two acridinium derivatives, 9-phenyl-10-methylacridinium (Ph-Arc) and 9-mesityl-10-methyl acridinium (Mes-Acr) were investigated in aqueous solutions of poly(methacrylic acids) (PMAA) at various pH values with various polymer to dye (R/D) ratios. In acidic conditions, PMAA effectively turned on the emission of both acridinium derivatives. Micromolar concentrations of copper (II) ions can selectively turn off the emission of dye/PMAA mixtures with a linear response range from 0.50 to 10.0 µM and a detection limit as low as 0.38 µM. In near neutral conditions, Mes-Acr in PMAA solutions displayed extremely weak emission. However, trace amounts of Hg ions can instantly turn on the emission with a low detection limit of 43.6 nM and a linear range between 1.0 to 10.0 µM. This analytical method is fast, cost-effective, and environmentally friendly, as it is conducted in 100 % aqueous solution with commercial acridinium derivatives and a biocompatible polymer.
在不同pH值以及不同聚合物与染料（R/D）比例的聚（甲基丙烯酸）（PMAA）水溶液中，研究了两种吖啶衍生物9-苯基-10-甲基吖啶（Ph-Arc）和9-均三甲苯基-10-甲基吖啶（Mes-Acr）的光物理性质。在酸性条件下，PMAA有效地开启了两种吖啶衍生物的发射。微摩尔浓度的铜（II）离子可以选择性地关闭染料/PMAA混合物的发射，线性响应范围为0.50至10.0 μM，检测限低至0.38 μM。在近中性条件下，PMAA溶液中的Mes-Acr发射极其微弱。然而，痕量的汞离子可以立即开启发射，检测限低至43.6 nM，线性范围在1.0至10.0 μM之间。这种分析方法快速、经济高效且环境友好，因为它是在100%水溶液中使用商业吖啶衍生物和生物相容性聚合物进行的。
