Natural products as probes for the spectral analysis and sensitive detection of metal-containing ionic liquids

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-04-15 DOI:10.1016/j.saa.2025.126245

Xinlu Li , Gaojin Zhou , Xueting Feng , Subhan Mahmood , Shun Yao , Lirong Nie

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Abstract

A new analytical method was developed for the rapid detection of metal-containing ionic liquids (MCILs) using the natural products (NPs) as fluorescent probes. Based on electrostatic potential (ESP) distribution and conductor-like screening model for real solvents (COSMO-RS) simulation, the possible interactions between quercetin, emodin, curcumin, esculetin and 1-butyl-3-methylimidazole tetrachloroferrate ([Bmim][FeCl₄]) were predicted, and the ultraviolet response, concentration titration experiments and fluorescence response of NPs and [Bmim][FeCl₄] were studied. Both theoretical and experimental studies indicated that esculetin showed the best corresponding performance to [Bmim][FeCl₄] and then was selected as fluorescent probe molecule for the detection of a series of similar ionic liquids containing Zn²⁺, Cu²⁺ and Al³⁺. The linear range of this analytical method towards [Bmim][FeCl₄] was 5 ∼ 30 μM (R² = 0.9957) with the relative standard deviation of 2.1 % and the limit of detection (LOD) of 1.08 μM. Recoveries, measured in the standard ethanol solution with the added concentration of 5 μM, were determined as 98.1 ∼ 102.5 % by the standard addition method. According to all the studied results, the probe of natural product possessed good selectivity, repeatability, and stability, which could be fixed onto filter paper to detect [Bmim][FeCl₄] in more intuitive way.

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天然产物作为含金属离子液体光谱分析和灵敏检测的探针

建立了以天然产物（NPs）为荧光探针快速检测含金属离子液体（MCILs）的新方法。基于静电电位（ESP）分布和真实溶剂类导体筛选模型（cosmoo - rs）模拟，预测了槲皮素、大黄素、姜黄素、槲皮素与1-丁基-3-甲基咪唑四氯铁酸盐（[Bmim][FeCl4]）之间可能的相互作用，并研究了NPs和[Bmim][FeCl4]的紫外响应、浓度滴定实验和荧光响应。理论和实验研究均表明，esculetin对[Bmim][FeCl4]的对应性能最好，因此选择esculetin作为荧光探针分子，用于检测一系列类似的含Zn2+、Cu2+和Al3+的离子液体。方法对[Bmim][FeCl4]的线性范围为5 ~ 30 μM (R2 = 0.9957)，相对标准偏差为2.1%，检出限（LOD）为1.08 μM。在添加浓度为5 μM的标准乙醇溶液中，采用标准添加法测定回收率为98.1 ~ 102.5%。研究结果表明，天然产物探针具有良好的选择性、重复性和稳定性，可将探针固定在滤纸上，更直观地检测[Bmim][FeCl4]。

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来源期刊

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.