1344吡啶羧酸配体构筑的Cu(Ⅱ)-MOFs及其染料吸附降解性能  

Dye adsorption and degradation properties of Cu(Ⅱ)-MOFs constructed by rigid pyridine carboxylic acid ligands

作　　者：巫云龙 唐鹏飞 范江 燕阳天 WU Yunlong;TANG Pengfei;FAN Jiang;YAN Yangtian(School of Materials Science and Engineering,Xi’an Polytechnic University,Xi’an 710048,China;Department of Chemical Engineering,Textile and Clothing,Shaanxi Polytechnic Institute,Xianyang 712000,Shaanxi,China)

机构地区：[1]西安工程大学材料工程学院,陕西西安710048 [2]陕西工业职业技术学院化工与纺织服装学院,陕西咸阳712000

出　　处：《西安工程大学学报》2024年第1期60-69,共10页Journal of Xi’an Polytechnic University

基　　金：陕西省教育厅化生基础科学研究项目(22JHQ022);咸阳市重点研发计划项目(2021ZDYF-GY-0042)。

摘　　要：为探究不同反应条件对MOFs微观结构和宏观性能的影响,在不同反应条件下,以硫酸铜(CuSO_(4)·5H_(2)O)和6-(吡啶-3′-基)间苯二甲酸(H_(2)L)为材料,制备了2种金属有机框架材料(MOFs){[Cu_(2)(L)_(2)·C _(2) H _(3) N]}n(1)和{[Cu(HL)_(2)]}n(2),并对合成的金属有机框架材料1和2进行了结构分析、TGA和FTIR表征以及对染料的吸附性能研究。单晶衍射数据分析表明:配合物1和2都属单斜晶系,P 21/c空间群。配合物1是一种基于双核轮桨次级构筑单元[Cu_(2)(COO)_(4)]构筑的三维紧密堆积化合物,配合物2由于配体部分质子化,结构中存在氢键[O_(3)—H…O_(4)],将二维层状网络结构连接成三维结构。配合物1是rtl拓扑类型的网络结构,拓扑符号为(42.610.83);配合物2是sql拓扑类型的网络结构,拓扑符号为(4^(4).6^(2))。2种配合物在相同时间间隔下对不同染料降解性能表明配合物2对水溶液中的孔雀石绿具有一定的化学吸附降解能力。In order to investigate the effects of different synthesis conditions on the micro-structures and macro-properties of MOFs,two metal-organic frameworks(MOFs){[Cu_(2)(L)2·C 2 H 3 N]}n(1)and{[Cu(HL)2]}n(2)were prepared by using the copper sulfate(CuSO_(4)·5H_(2) O)and 6-(pyridin-3′-yl)isophthalic acid(H_(2) L)as the building units under the different reaction conditions.Compound 1 and 2 were fully studied through structure analysis,thermogravimetric analysis(TGA)and FT-IR spectroscopy.Single crystal data reveals that compound 1 and 2 crystallize in the monoclinic crystal system with the P21/c space group.Structure analysis indicates that compounds 1 shows a three-dimensional dense packing structure based on the secondary building units dinuclear paddle wheel shaped[Cu_(2)(COO)4](SBUs).Structure analysis reveals that compounds 2 shows a 2D layer structure,which was further connected by the hydrogen bonds[O3—H…O4]to give a 3D network.Topological analysis for compounds 1 and 2 show that 1 can be simplified as a two connect rtl network with the point symbol of(42.610.83),and 2 can be viewed as a unnodol connect sql network with the point symbol of(44.62).In order to study the properties of the compounds 1 and 2 in aqueous solution,three different dyes were used to characterize the dye degradation properties of 1 and 2 using ultraviolet/visible spectroscopy(UV)at the same time.The degradation properties of compounds 1 and 2 on different dyes at the same time intervals show that compound 2 shows a certain chemical adsorption and degradation ability for malachite green in aqueous solution.

关 键 词：金属有机框架材料 次级构筑单元 三维紧密堆积结构 二维层状 染料吸附降解 

分 类 号：TS190.3[轻工技术与工程—纺织化学与染整工程] O641.4[轻工技术与工程—纺织科学与工程]