State Key Laboratory for Modification of Chemical Fibers and Polymers Materials & College of Materials Sciences and Engineering, Donghua University, Shanghai 201620, China.
Analyst. 2018 Jan 15;143(2):449-457. doi: 10.1039/c7an01591g.
A novel multifunctional sensing material, RSPT, incorporating rhodamine B hydrazide, a Schiff base, and a phenolic hydroxyl group into triazine, was identified and prepared. After the molecular structure was characterized by FTIR, H NMR, mass spectra and element analysis, it was notably found that there were multichannel turn-on fluorescent responses to Zn and Bi, i.e., a strong fluorescence emission at 481 nm in DMF-water (99/1, v/v) for Zn with a color change from colorless to light yellow-green, while an increased fluorescence emission at 580 nm in CHCN-water (99/1, v/v) for Bi with a color change from colorless to red. Their different action mechanisms for the RSPT-Zn and RSPT-Bi complexes were investigated and confirmed by means of fluorescent titration, binding constant, Job's plot curve, H NMR titration, and theoretical simulation. RSPT would be a promising turn-on fluorescent chemo-dosimeter for multichannel detection of Zn and Bi with a detection limit of 3.0 nM for Zn and 8.6 nM for Bi.
一种新型多功能传感材料 RSPT，将罗丹明 B 腙、席夫碱和酚羟基同时引入三嗪中，对其进行了鉴定和制备。通过傅里叶变换红外光谱（FTIR）、核磁共振氢谱（H NMR）、质谱和元素分析对其分子结构进行了表征，结果表明，该材料对 Zn 和 Bi 具有多通道荧光响应，即在 DMF-水（99/1，v/v）中，Zn 表现出强烈的荧光发射（481nm），颜色从无色变为浅黄绿色；而在 CHCN-水（99/1，v/v）中，Bi 表现出荧光发射增强（580nm），颜色从无色变为红色。通过荧光滴定、结合常数、Job 曲线、H NMR 滴定和理论模拟等方法，研究并证实了 RSPT-Zn 和 RSPT-Bi 配合物的不同作用机制。RSPT 有望成为一种用于多通道检测 Zn 和 Bi 的荧光化学传感器，其对 Zn 的检测限为 3.0 nM，对 Bi 的检测限为 8.6 nM。
