Interaction of Rhodamine 6G with Biodegradable Poly(lactic Acid) Nanoparticles: A Suitable Analytical Strategy for the Detection of Nanoplastics in Water

IF 4.7 2区化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Polymer Materials Pub Date : 2025-09-15 DOI:10.1021/acsapm.5c02021

M. Andrea Molina Torres, , , Janet de los Angeles Chinellato Díaz, , , Facundo Mattea, , , Marcelo R. Romero*, , and , Natalia L. Pacioni*,

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Abstract

Poly(lactic acid) nanoparticles (PLA-NP) with an average size of 70 nm, effectively quench the fluorescence emission of rhodamine 6G via static quenching. This process occurs as a result of forming a nonfluorescent complex in the ground state. The determined Stern–Volmer constant depends on the incubation time, being 1.88 times more sensitive at 5 min compared to 1 min, attributed to conformational changes after the rhodamine binds to the nanoparticle surface. The decrease in the fluorescence signal was employed as the analytical strategy for detecting and quantifying PLA-NP in aqueous systems, achieving a limit of detection of 26.5 pM. The accuracy of the determination was demonstrated with 95% confidence by recovery assays (90%–110%) in spiked samples of surface river water. This method represents a promising tool for researchers and environmental scientists dedicated to monitoring and mitigating water pollution caused by nanoplastics.

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罗丹明6G与可生物降解聚乳酸纳米粒子的相互作用：一种检测水中纳米塑料的合适分析策略

聚乳酸纳米粒子（PLA-NP）平均尺寸为70 nm，通过静态猝灭的方式有效地猝灭罗丹明6G的荧光发射。这一过程是由于在基态形成非荧光复合物而发生的。测定的斯特恩-沃尔默常数取决于孵育时间，5分钟时的灵敏度是1分钟时的1.88倍，这归因于罗丹明与纳米颗粒表面结合后的构象变化。利用荧光信号的减弱作为检测和定量水体系中PLA-NP的分析策略，达到了26.5 pM的检测限。通过对地表水加标样品的回收率测定（90% ~ 110%），证明了测定的准确性，置信度为95%。对于致力于监测和减轻纳米塑料造成的水污染的研究人员和环境科学家来说，这种方法是一种很有前途的工具。

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来源期刊

ACS Applied Polymer Materials Multiple-

CiteScore

7.20

自引率

6.00%

发文量

810

期刊介绍： ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.