Nitrate sensing with molecular cage ionophores: a potentiometric approach†

IF 3.5 Q2 CHEMISTRY, ANALYTICAL

Sensors & diagnostics Pub Date : 2025-02-17 DOI:10.1039/D4SD00359D

Ahmet Onder, Ferit Begar, Erman Kibris, Onur Buyukcakir and Umit Hakan Yildiz

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Abstract

Nitrate ions are widespread environmental pollutants in water and soil, posing critical risks to both human health and ecosystems. This study introduces a molecular cage as a novel ionophore for potentiometric nitrate-selective ion-selective electrodes (ISEs) designed for enhanced specificity and sensitivity. Among six synthetic candidates, the electrode incorporating a 1,3,5-tri(p-hydroxyphenyl)benzene-based chlorotriazine pillared cage molecule (CAGE-1) exhibited superior performance, characterized by a linear response in the nitrate concentration range of 1.0 × 10⁻⁵ to 1.0 × 10⁻¹ M, with a high coefficient of determination (R² = 0.9971) and a slope of −53.1 ± 1.4 mV dec⁻¹. The electrode also achieved a limit of detection of 7.5 × 10⁻⁶ M. These findings highlight the potential of molecular cages as ionophores for nitrate sensing in environmental applications.

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硝酸盐传感与分子笼离子载体：电位法†

硝酸盐离子是水和土壤中广泛存在的环境污染物，对人类健康和生态系统构成严重威胁。本研究介绍了一种分子笼作为一种新型的离子载体，用于电位硝酸选择性离子选择电极（ISEs），旨在提高特异性和灵敏度。在6个候选电极中，1,3,5-三（对羟基苯基）苯基氯三嗪柱状笼分子（cage -1）电极表现出优异的性能，在硝酸盐浓度范围为1.0 × 10−5 ~ 1.0 × 10−1 M范围内具有良好的线性响应，测定系数高（R2 = 0.9971），斜率为- 53.1±1.4 mV dec−1。该电极也达到了7.5 × 10−6 m的检测极限。这些发现突出了分子笼作为离子载体在环境应用中硝酸盐传感的潜力。

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

Sensors & diagnostics

CiteScore

2.30

自引率

0.00%

发文量