Selective adsorption of organic dyes and iodine by a two-dimensional cobalt(II) metal-organic framework

IF 5.9 4区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR 结构化学 Pub Date : 2024-09-04 DOI:10.1016/j.cjsc.2024.100427
Muhammad Riaz, Rakesh Kumar Gupta, Di Sun, Mohammad Azam, Ping Cui
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Abstract

The development of effective adsorbent materials for capturing organic dyes and iodine is crucial to reduce the environmental impact and ensure human health. In this context, a two-dimensional (2D) Co-based metal-organic framework SDU-CP- was rationally designed with 4-(4-carboxyphenyl)-1,2,4-triazole (Hcpt) and 2,4,6-tri(4-pyridinyl)-1,3,5-triazine (tpt) as organic linkers. The SDU-CP- was comprehensively characterized using single-crystal X-ray diffraction analysis, thermogravimetric analysis, fourier transform infrared spectroscopy, raman spectroscopy, powder x-ray diffraction analysis and UV-vis spectroscopy. Molecular docking were conducted to elucidate potential binding sites on SDU-CP- for effective interactions with RhB and ST. Featuring negatively charged surface and trigonal microporous channels, SDU-CP- exhibits excellent adsorption capacities of organic dyes (919.2 ​mg/g for Rhodamine B and 1565 ​mg/g for Safranine T) as well as iodine (563.0 ​mg/g in solution and 1100 ​mg/g in the vapor phase). The exceptional adsorption performance of SDU-CP- for cationic dyes can be ascribed to the electrostatic interaction facilitated by negatively charged zeta potential and the size-matching principle, whereas the pyridine active sites in channels significantly enhance the binding affinity for iodine. Moreover, SDU-CP- can serve as chromatographic column filters for the rapid adsorption and separation of dyes. The results demonstrate the excellent selective adsorption performance of SDU-CP-, highlighting its potential for environmental and industrial applications.
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二维钴(II)金属有机框架对有机染料和碘的选择性吸附
开发捕捉有机染料和碘的有效吸附材料对于减少环境影响和确保人类健康至关重要。在此背景下,以 4-(4-羧基苯基)-1,2,4-三唑(Hcpt)和 2,4,6-三(4-吡啶基)-1,3,5-三嗪(tpt)为有机连接体,合理设计了一种二维(2D)Co 基金属有机框架 SDU-CP-。使用单晶 X 射线衍射分析、热重分析、傅立叶变换红外光谱、喇曼光谱、粉末 X 射线衍射分析和紫外可见光谱对 SDU-CP- 进行了全面表征。通过分子对接,阐明了 SDU-CP- 与 RhB 和 ST 有效相互作用的潜在结合位点。SDU-CP- 具有带负电荷的表面和三棱形微孔通道,对有机染料(罗丹明 B 为 919.2 毫克/克,莎呋宁 T 为 1565 毫克/克)和碘(溶液中为 563.0 毫克/克,气相中为 1100 毫克/克)具有出色的吸附能力。SDU-CP- 对阳离子染料的优异吸附性能可归因于带负电的 Zeta 电位和尺寸匹配原理所促进的静电相互作用,而通道中的吡啶活性位点则显著增强了对碘的结合亲和力。此外,SDU-CP- 还可用作色谱柱过滤器,用于快速吸附和分离染料。研究结果表明,SDU-CP- 具有出色的选择性吸附性能,在环境和工业应用方面具有巨大潜力。
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来源期刊
结构化学
结构化学 化学-晶体学
CiteScore
4.70
自引率
22.70%
发文量
5334
审稿时长
13 days
期刊介绍: Chinese Journal of Structural Chemistry “JIEGOU HUAXUE ”, an academic journal consisting of reviews, articles, communications and notes, provides a forum for the reporting and discussion of current novel research achievements in the fields of structural chemistry, crystallography, spectroscopy, quantum chemistry, pharmaceutical chemistry, biochemistry, material science, etc. Structural Chemistry has been indexed by SCI, CA, and some other prestigious publications.
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