Fluorescence and electrochemical detection of pollutants utilizing a Keggin-type Zn(II)-polyoxometalate

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2025-02-01 DOI:10.1016/j.poly.2024.117360

Wei Chen , Xiangyang Li , Wei Yao , Vladimir P. Fedin , Enjun Gao

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Abstract

The escalating development of the national industry has led to a growing apprehension regarding water pollution. Therefore, there is an urgent need to develop a rapid, convenient, and highly sensitive method for detecting water pollutants. In this study, we successfully prepared a novel Keggin-type polyacid hybrid material with zero-dimensional structure [Zn₂(C₁₀H₆NO₂)₂(C₁₀H₇NO₂)₄][ZnCl(C₁₀H₇NO₂)₃]₂[HPMo₁₂O₄₀]₂ (1) through steam heating using 2,3-quinoline dicarboxylic acid, phosphomolybdic acid and Zn(NO₃)₂ along as precursors. However, it was observed that 2,3-quinoline dicarboxylic acid (H₂L = C₁₁H₇NO₄) loses a carboxyl group from a new quinoline-3-carboxylic acid ligand (HL1 = C₁₀H₇NO₂) during the synthesis process of 1. Our investigations have revealed two distinct forms for Zn²⁺, form A involves coordination with one Zn ion, three ligands and one chloride ion while form B forms a binuclear cluster [Zn₂(C₁₀H₆NO₂)₂(C₁₀H₇NO₂)₄]²⁺ by coordinating with two L1⁻¹ and four HL1 ligands. These structures are further extended into 3D supramolecular architectures via π-π packing between one-dimensional chains formed by connecting the Keggin-type polyoxometalates through multiple hydrogen bonds. Additionally, we explore the fluorescence and electrochemical properties of compound 1. These results demonstrate its exceptional selectivity and high sensitivity towards Fe³⁺, HPO₄²⁻ and CrO₄²⁻ as a fluorescence probe and excellent electrochemical activity towards NaNO₂. Furthermore, the reaction mechanism was thoroughly examined.

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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.