A dual-chromophore-based cross-reactive fluorescent sensor for efficient discrimination of multiple anionic surfactants
A dual-chromophore-based cross-reactive fluorescent sensor for efficient discrimination of multiple anionic surfactants
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DOI：
10.1016/j.snb.2020.129408
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发表时间：
2021-01-07
影响因子：
8.4
通讯作者：
Fang, Yu
中科院分区：
文献类型：
--
作者：
Qiao, Min;Cao, Yuan;Fang, Yu
表面活性剂的广泛使用和对环境介质的不规范处理使其成为众所周知的环境污染物。因此，开发一种能够有效区分各种表面活性剂，特别是阴离子表面活性剂的传感器具有重要意义。本文以芘和罗丹明为信号单元，低聚乙氧基为连接体，设计并合成了一种基于双发色团的荧光探针。引入两个发色团是为了增加多波长交叉反应的能力。荧光测量表明，探针可以选择性识别阴离子表面活性剂SDS，而不是阳离子DTAB、中性Tween 20和两性离子SB3-10，并表现出额外的罗丹明发射和芘发射。此外，芘单体、芘准分子和罗丹明的不同荧光发射使探针能够对不同的阴离子表面活性剂进行多波长交叉反应。结合芘单体和准分子与罗丹明的比值信号，可以生成对特定阴离子表面活性剂的特异性识别模式，并提供用于区分SDS、SDBS、SDeS、SDSO、SDeSO和AOT等阴离子表面活性剂的二维散射图。
The widespread use of surfactants and unregulated treatment of environmental media make them well-known environmental pollutants. It is of great significance to develop an effective discriminative sensor that can distinguish various surfactants, especially among anionic surfactants. In the present work, a dual-chromophorebased fluorescent probe was designed and synthesized, where pyrene and rhodamine were used as the signaling units and oligoethoxyl group used as a linker. The introduction of two chromophores was to increase the capacity of multi-wavelength cross-reactivity. Fluorescence measurements revealed that the probe could selectively recognize anionic surfactant SDS over cationic DTAB, neutral Tween 20 and zwitterionic SB3-10 by exhibiting extra rhodamine emission accompanied with pyrene emission. Moreover, the varied fluorescence emission of pyrene monomer, pyrene excimer, and rhodamine empowered the probe with multiple-wavelength cross-reactive responses to different anionic surfactants. The combination of the two ratio signals of pyrene monomer and excimer to rhodamine can generate specific recognition pattern for a particular anionic surfactant and provide a two-dimensional scattering plot for differentiating different anionic surfactants including SDS, SDBS, SDeS, SDSO, SDeSO, and AOT.