Detecting emerging surfactant pollutants with a highly fluorescent host-guest ensemble

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2025-04-09 DOI:10.1016/j.molliq.2025.127546

Tejasvi Naik , Daria V. Berdnikova , Sharmistha Dutta Choudhury

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Abstract

The widespread use of surfactants and their consequent discharge into our terrestrial and aquatic environment has raised concerns about the adverse effects of these emerging pollutants and sparked the need for developing methods for their speedy detection. The present study describes a simple fluorescence-based approach for surfactant detection in aqueous solutions by competitive disruption of a highly fluorescent host–guest ensemble formed between the hybrid chromophore, styryl(pyridinium)-chromene (DSP-C), and the macrocycle, 2-hydroxypropyl-β-cyclodextrin (HPβCD). A large fluorescence turn-off response is obtained in the presence of anionic surfactants, but not for neutral, cationic or zwitterionic surfactants. The limit of detection of the anionic surfactants is found to decrease with increase in their hydrophobic chain length. The principle behind the sensing mechanism has been elucidated. The potential of the HPβCD•DSP-C sensing ensemble for translation into a paper-based sensor platform has also been tested.

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用高荧光主客系检测新出现的表面活性剂污染物

表面活性剂的广泛使用及其随后排放到我们的陆地和水生环境中，引起了人们对这些新出现的污染物的不利影响的关注，并引发了开发快速检测它们的方法的需要。本研究描述了一种简单的基于荧光的表面活性剂检测方法，通过竞争性破坏在杂化发色团苯乙烯（吡啶）-铬（DSP-C）和大环2-羟丙基-β-环糊精（HPβCD）之间形成的高荧光主-客系。在阴离子表面活性剂存在时，获得了较大的荧光关闭响应，但对于中性、阳离子或两性离子表面活性剂则没有。阴离子表面活性剂的检出限随其疏水链长的增加而降低。传感机制背后的原理已被阐明。HPβCD•DSP-C传感集成转换为基于纸张的传感器平台的潜力也得到了测试。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.