Two new d10-based transition metal coordination polymers used for antibiotic degradation

IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Polyhedron Pub Date : 2025-02-01 DOI:10.1016/j.poly.2024.117365

Xin Zhong , Mithun Kumar Ghosh , Yiguo Ayue , Jingyi Liang , Jun Wang , Mohd Afzal , Abdullah Alarifi , Tanmay Kumar Ghorai

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Abstract

In this study, we synthesized two new coordination polymers (CPs), [Cd₂(bbpy)(L)₂(DMF)₂]_n (1) and [Zn₂(bbpy)(L)₂(DMF)₂]_n (2) ((bbpy = 3,5-bis(benzoimidazo-2-ly)pyridine and H₂L = 4,4′-((1,2-phenylenebis(methylene) bis(oxy))dibenzoic acid)), using a solvothermal method. The optical band gaps of CP 1 and 2, determined using UV–visible spectroscopy, were 2.3 eV and 2.1 eV, respectively. Both CPs demonstrated strong photocatalytic activity for the degradation of various antibiotic pollutants under UV light, with CP 2 showing superior efficiency, particularly for metronidazole (MDZ), achieving 90.89 % degradation. The optimal photocatalytic conditions for CP 2 were a catalyst dosage of 5 mg/L, an MDZ concentration of 40 ppm, and a neutral pH. The stability and reusability of the photocatalyst were confirmed through multiple cycles of use. Radical trapping experiments identified superoxide radicals (O₂̇⁻) as the primary active species in the photocatalytic process. The photocatalytic efficiency of CP 2 was further tested in different water sources, with degradation rates of 87.99 % in tap water, 80.49 % in river water, and 92.13 % in deionized water. The presence of inorganic anions such as Cl⁻, NO₃⁻, and CO₃²⁻ was also studied, with CO₃²⁻ having the most significant inhibitory effect on the degradation efficiency. These results suggest that CP 2 is a promising candidate for practical wastewater treatment applications.

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两种用于抗生素降解的新型d10基过渡金属配位聚合物

本文采用溶剂热法合成了[Cd2(bbpy)(L)2(DMF)2]n(1)和[Zn2(bbpy)(L)2(DMF)2]n (2) (（bbpy = 3,5-二（苯并咪唑-2-二）吡啶和H2L = 4,4 ' -（（1,2-苯基双（亚甲基）双（氧）二苯甲酸）））两种新的配位聚合物（CPs）。利用紫外可见光谱测定cp1和cp2的光学带隙分别为2.3 eV和2.1 eV。两种CPs在紫外光下对各种抗生素污染物的降解均表现出较强的光催化活性，其中cp2表现出更强的效率，特别是对甲硝唑（MDZ）的降解达到90.89%。cp2的最佳光催化条件为催化剂用量为5 mg/L， MDZ浓度为40 ppm， ph为中性。通过多次循环使用，证实了光催化剂的稳定性和可重复使用性。自由基捕获实验发现超氧自由基（O2³−）是光催化过程中的主要活性物质。进一步测试了cp2在不同水源中的光催化效率，在自来水中的降解率为87.99%，在河水中的降解率为80.49%，在去离子水中的降解率为92.13%。研究了无机阴离子Cl−、NO3−和CO32−的存在，其中CO32−对降解效率的抑制作用最为显著。这些结果表明，cp2在实际废水处理中具有很好的应用前景。

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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.