无孔假多晶配位聚合物中依赖阴离子的可逆碘吸收

IF 2.6 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
CrystEngComm Pub Date : 2024-06-22 DOI:10.1039/D4CE00402G
Ghazale Khorshidi, Behrouz Notash and Maciej Kubicki
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引用次数: 0

摘要

三种新型无孔汞(II)配位聚合物(CPs)含有二价 1,1'-(1,4-亚苯基)双(3-(吡啶-4-基)脲)配体(4,4-pbubp),即合成了{[Hg(4,4-pbubp)Cl2](DMSO)3}n(CP1)、{[Hg(4,4-pbubp)Br2](DMSO)3}n(CP2)和{[Hg(4,4-pbubp)I2](DMSO)4}n(CP3),并通过红外分析、元素分析(CHNS)、TGA、PXRD 和单晶 X 射线衍射分析对其结构进行了表征。通过脲官能团和几个 DMSO 溶剂分子之间的各种氢键相互作用,所有这些化合物都在晶体中形成了一维高分子之字链,并自组装成高维结构。对吸附动力学和等温线进行了理论分析,以检验碘吸附数据。结果与伪二阶动力学模型和 Freundlich 等温线模型有效相关。结果表明,在该族化合物中,碘吸附能力与阴离子(CP1>CP2>CP3)有关,而含有氯阴离子的化合物(CP1)对碘的去除能力最高。根据 Freundlich 模型,CP1 在室温下对碘的最大吸附量为 262.01 mg g-1。碘吸附后,化合物@I2 通过扫描电子显微镜(SEM)、能量色散 X 射线分析(EDAX)和拉曼光谱进行了表征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Reversible anion-dependent iodine uptake in nonporous pseudopolymorphic coordination polymers†

Reversible anion-dependent iodine uptake in nonporous pseudopolymorphic coordination polymers†

Three new nonporous mercury(II) coordination polymers (CPs) containing the ditopic 1,1′-(1,4-phenylene)bis(3-(pyridin-4-yl)urea) ligand (4,4-pbubp), namely, {[Hg(4,4-pbubp)Cl2](DMSO)3}n (CP1), {[Hg(4,4-pbubp)Br2](DMSO)3}n (CP2) and {[Hg(4,4-pbubp)I2](DMSO)4}n (CP3) were synthesized and characterized structurally through infrared analysis, elemental analysis (CHNS), TGA, PXRD and single-crystal X-ray diffraction analysis. All of these compounds formed 1D polymeric zigzag chains self-assembled in the crystal into higher-dimensional structures through various hydrogen-bonding interactions involving the urea functional group and several DMSO solvent molecules. These CPs were examined as potential adsorbents for the reversible uptake of iodine from the solution. Theoretical analysis of the adsorption kinetics and isotherms was applied to examine the iodine adsorption data. The results correlated effectively with the pseudo-second-order kinetic model and the Freundlich isotherm model. Our results showed that in this family, the iodine uptake capacity was dependent on the anion (CP1 > CP2 > CP3), and the compound which contained chloride anions (CP1) showed the highest capacity to remove iodine. The maximum uptake capacity of 262.01 mg g−1 iodine over CP1 at room temperature based on the Freundlich model was achieved. After iodine adsorption, compounds@I2 were characterized by scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDAX) as well as Raman spectroscopy.

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来源期刊
CrystEngComm
CrystEngComm 化学-化学综合
CiteScore
5.50
自引率
9.70%
发文量
747
审稿时长
1.7 months
期刊介绍: Design and understanding of solid-state and crystalline materials
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