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N-(若丹明 B)-内酰胺-乙二胺(RhB-EDA)荧光探针的光学性质设计与研究。

Design and Investigation of Optical Properties of N-(Rhodamine-B)-Lactam-Ethylenediamine (RhB-EDA) Fluorescent Probe.

机构信息

Institute of Engineering Materials and Design, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia.

Institute for Environmental Protection and Sensors, Beloruska 7, 2000 Maribor, Slovenia.

出版信息

Sensors (Basel). 2018 Apr 14;18(4):1201. doi: 10.3390/s18041201.

Abstract

This study presents chemical modification of a Rhodamine B (RhB) sensor probe by ethylenediamine (EDA), and investigation of its spectral as well as sensor properties to the various metals. The synthesised -(Rhodamine-B)-lactam-ethylenediamine (RhB-EDA) fluorescent probe shows interesting optical sensor properties, and high sensitivity and selectivity to Ag⁺ ions among all the tested metal ions (K⁺, Mg, Cu, Ni, Fe, Pb, Na⁺, Mn, Li⁺, Al, Co, Hg, Sr, Ca, Ag⁺, Cd and Zn), while the well-known Rhodamine B (RhB) fluorescent probe shows much less sensitivity to Ag⁺ ions, but high sensitivity to Fe ions. The novel fluorescent sensor probe RhB-EDA has the capabilities to sense Ag⁺ ions up to µM ranges by using the fluorescence quenching approach. The probe displayed a dynamic response to Ag⁺ in the range of 0.43 × 10-10 M with a detection limit of 0.1 μM. The sensing system of an RhB-EDA novel fluorescent probe was optimised according to the spectral properties, effect of pH and buffer, photostability, incubation time, sensitivity, and selectivity. Since all the spectral and sensing properties were tested in green aqueous media, although many other similar sensor systems rely on organic solvent solutions, the RhB-EDA sensing probe may be a good candidate for measuring Ag⁺ ions in real-life applications.

摘要

本研究通过乙二胺(EDA)对罗丹明 B(RhB)传感器探针进行化学修饰,并研究其对各种金属的光谱和传感器特性。合成的-(罗丹明 B)-内酰胺-乙二胺(RhB-EDA)荧光探针表现出有趣的光学传感器特性,对所有测试的金属离子(K⁺、Mg、Cu、Ni、Fe、Pb、Na⁺、Mn、Li⁺、Al、Co、Hg、Sr、Ca、Ag⁺、Cd 和 Zn)中的 Ag⁺离子具有高灵敏度和选择性,而著名的罗丹明 B(RhB)荧光探针对 Ag⁺离子的灵敏度要低得多,但对 Fe 离子的灵敏度较高。新型荧光传感器探针 RhB-EDA 具有通过荧光猝灭法检测 µM 范围内 Ag⁺离子的能力。该探针在 0.43 × 10-10 M 范围内对 Ag⁺表现出动态响应,检测限为 0.1 μM。根据光谱特性、pH 和缓冲液的影响、光稳定性、孵育时间、灵敏度和选择性对 RhB-EDA 新型荧光探针的传感系统进行了优化。由于所有光谱和传感特性均在绿色水性介质中进行了测试,尽管许多其他类似的传感器系统依赖于有机溶剂溶液,但 RhB-EDA 传感探针可能是用于在实际应用中测量 Ag⁺离子的良好候选物。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d641/5948706/ce182aaf293d/sensors-18-01201-sch001.jpg

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