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A multifunctional microporous metal–organic framework: efficient adsorption of iodine and column-chromatographic dye separation

机译:多功能微孔金属-有机框架:碘的有效吸附和柱色谱染料分离

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In this work, a multifunctional microporous metal–organic framework (MOF), [Cd(ABTC)(H _(2) O) _(2) (DMA)]·4DMA ( JLNU-4 ; JLNU = Jilin Normal University; H _(4) ABTC = 3,3′,5,5′-azobenzenetetracarboxylic acid), has been synthesized based on the ligand H _(4) ABTC under solvothermal conditions. JLNU-4 shows excellent uptake of iodine both in solution and in the vapor phase, owing to the existence of a microporous structure in JLNU-4 . The adsorption kinetics during the process of iodine adsorption were analyzed via a series of qualitative and quantitative analyses, such as the Langmuir and Freündlich adsorption isotherms. In addition, according to UV/vis spectroscopy analysis and the colour variance of JLNU-4 , the relatively small sized dye methylene blue (MB) could be efficiently adsorbed by JLNU-4 , through size-exclusion effects. Particularly, JLNU-4 can serve as a column-chromatographic filler for the separation of dye molecules. Therefore, JLNU-4 is a multifunctional microporous MOF for iodine adsorption and column-chromatographic dye separation.
机译:在这项工作中,一个多功能的微孔金属有机骨架(MOF),[Cd(ABTC)(H _(2)O)_(2)(DMA)]·4DMA(JLNU-4; JLNU =吉林师范大学; H _(4)ABTC = 3,3',5,5'-偶氮苯四甲酸)是在溶剂热条件下基于配体H _(4)ABTC合成的。由于JLNU-4中存在微孔结构,因此JLNU-4在溶液和气相中均显示出优异的碘吸收率。通过一系列定性和定量分析,如Langmuir和Freündlich吸附等温线,分析了碘吸附过程中的吸附动力学。此外,根据紫外/可见光谱分析和JLNU-4的颜色变化,通过尺寸排阻效应,JLNU-4可以有效吸附相对较小尺寸的染料亚甲基蓝(MB)。特别地,JLNU-4可以用作分离染料分子的柱色谱填料。因此,JLNU-4是用于碘吸附和柱色谱染料分离的多功能微孔MOF。

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