Synthesis and characterization of Schiff-base Chemosensor for spectroscopic and colorimetric selective recognition of Cu2+ in semi-aqueous medium

IF 2.8 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2026-02-15 Epub Date: 2025-12-18 DOI:10.1016/j.poly.2025.117930

Ranjana Aggarwal , Prince Kumar , Garima Sumran , Mona Hooda , Ashwani Kumar

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引用次数: 0

Abstract

A novel (1E,2Z)-2-(((E)-2-hydroxybenzylidene)hydrazono)-1,2-diphenylethan-1-one oxime (HHDO, 4) has been synthesized by condensation reaction of 2-hydrazono-1,2-diphenylethan-1-one oxime (2) and 2-hydroxybenzaldehyde (3) and characterized by FTIR, ¹H NMR, ¹³C NMR and mass spectrum (MS). HHDO displays high selectivity and sensitivity towards Cu²⁺ ions. Sensing property for Cu²⁺ is studied by UV–visible, fluorescence spectrophotometric analyses, along with Job's plot analysis. The result shows that the stoichiometric ratio of the complex formed by HHDO and Cu²⁺ is 1:1. HHDO exhibits an excellent selectivity to Cu²⁺ over other examined metal ions by showing an intense color change from colorless to crimson yellow under visible light. The binding behavior of the ligand towards Cu²⁺ ions is described by the infrared spectrum analysis. In addition, the developed sensing probe HHDO exhibits a limit of detection of 2.66 × 10⁻⁵ M, and a limit of quantitation of 8.89 × 10⁻⁵ M in the linear range 0.75–7.0 × 10⁻⁶ M with a good association affinity of 8.26 × 10⁶ M⁻¹ for Cu²⁺ ions. Additionally, HHDO could be applied as a naked-eye colorimetric kit for Cu²⁺ ions.

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半水介质中选择性识别Cu2+的希夫碱化学传感器的合成与表征

以2-腙-1,2-二苯基-1-肟(2)和2-羟基苯甲醛(3)为原料，通过缩合反应合成了一种新型(1E,2Z)-2-(（(E)-2-羟基苄基-1-肟）-1,2-二苯基-1-肟（HHDO, 4），并用FTIR、1H NMR、13C NMR和质谱（MS）对其进行了表征。HHDO对Cu2+离子具有较高的选择性和敏感性。通过紫外可见，荧光分光光度分析以及Job图分析研究了Cu2+的传感特性。结果表明，HHDO与Cu2+形成的络合物的化学计量比为1:1。HHDO对Cu2+具有较好的选择性，在可见光下表现出从无色到深黄色的强烈颜色变化。红外光谱分析描述了该配体对Cu2+离子的结合行为。在0.75 ~ 7.0 × 10−6 M线性范围内，检测限为2.66 × 10−5 M，定量限为8.89 × 10−5 M，对Cu2+离子具有8.26 × 106 M−1的良好缔合亲和力。此外，HHDO可以作为Cu2+离子的裸眼比色试剂盒。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.