化学
铜
羟胺
光化学
荧光
分子内力
胺气处理
离子
检出限
无机化学
有机化学
色谱法
量子力学
物理
作者
Xiaotong Xia,Shuru Liu,Wenming Liu,Qingsong Xu,Ximing Xu,Fang Liu,Tao Deng
摘要
A phthalimide probe (P1) possessing a hydroxylamine group on the benzene ring has been prepared for fluorescence sensing of copper ions. The detection is based on the reaction between hydroxylamine and copper ions, resulting in two fluorescent products through hydroxyl rearrangement and dehydroxylation reactions. P1 shows a specific and sensitive fluorescence response towards copper ions with a limit of detection (LOD) of 1.11 nM (N = 3). The copper impurities from the industrial sources of the "click" ligand (tris(benzyltriazolylmethyl)amine (TBTA)) have been successfully examined using P1. This is the first case to utilize the reaction between hydroxylamine and copper ions. More importantly, the copper mediated hydroxyl rearrangement reaction opens a way to prepare a new sort of excited state intramolecular proton transfer (ESIPT) dye with ultra-small size and bright green fluorescence under physiological conditions.
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