New substituted 1,2,3-triazoles for ratiometric recognition to Fe³⁺ ions.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2024-01-15 Epub Date: 2023-10-18 DOI:10.1016/j.saa.2023.123558

Natalia Selivanova, Marina Shulaeva, Vyacheslav Semenov, Yuriy Galyametdinov

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Abstract

Two novel click derived sensory systems for different derivatives connected via a triazole linkage have been developed as a component of a chemosensor with sensitive towards Fe³⁺ ions. The 1-octyl-4-carboxyl-1,2,3-triazole (TR1) system demonstrated sensitivity to calcium ion. The 1,3-bis(4-hydroxycarbamoyl-1,2,3-triazol-1-yl)xylylene (TR2) system was shown to possess a preferential detection capability as a colorimetric probe for Fe³⁺ ions by exhibiting an obvious pH-dependent color change from colorless to pink. Complexation of the ligands with Fe³⁺ ions was studied. The 1:1 stoichiometry and bonding sites of TR1_-Fe³⁺, and TR2_-Fe³⁺ complexes were elucidated by analyzing the Job plot. The association constants of 5.35 × 10⁵ M¹ for TR1_- Fe³⁺ and 3.58 × 10⁴ M¹ for TR2_-Fe³⁺ and detection limits 1.68 × 10^-8 and 2.52 × 10^-7 were determined from standard deviation and linear fittings.

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新型取代的1,2,3-三唑对Fe3+离子的比率识别。

已经开发了两种用于不同衍生物的新型点击衍生传感系统，它们通过三唑键连接，作为对Fe3+离子敏感的化学传感器的组件。1-辛基-4-羧基-1,2,3-三唑（TR1）体系对钙离子具有敏感性。1,3-双（4-羟基氨基甲酰基-1,2,3-三唑-1-基）亚二甲苯（TR2）体系表现出从无色到粉红色的明显的pH依赖性颜色变化，显示出作为Fe3+离子的比色探针的优先检测能力。研究了配体与Fe3+离子的络合反应。通过分析Job图，阐明了TR1-Fe3+和TR2-Fe3+配合物的1:1化学计量和结合位点。用标准偏差和线性拟合方法测定了TR1-Fe3+的缔合常数5.35×105M1和TR2-Fe3+的3.58×104M1，检出限1.68×10-8和2.52×10-7。

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Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

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