Exploring the adsorption of small molecules,such as dyes and iodine,by using novel functionalized MOFs has aroused widespread interest.In this work,seven isostructural compounds were synthesized successfully under sol...Exploring the adsorption of small molecules,such as dyes and iodine,by using novel functionalized MOFs has aroused widespread interest.In this work,seven isostructural compounds were synthesized successfully under solvothermal condition,namely[Ln_(2)(TATAB)_(2)]·xDMF·yH_(2)O(1-7;Ln=Eu^(3+),Gd^(3+),Tb^(3+),Dy^(3+),Ho^(3+),Er^(3+)and Y^(3+)),by the reaction of 4,4′,4″-((1,3,5-triazine-2,4,6-triyl)tri(azanediyl))tribenzoic acid(H_(3)TATAB)and rare earth metal ions.X-Ray diffraction analysis revealed that a window-shaped 3D structure was formed by“paddle wheel”-type[Ln_(2)(CO_(2))_(6)]secondary structural units connected to eight H_(3)TATAB ligands,in which the channel size reached 2.73 nm and the available volumes of all the compounds surpassed 61%.Considering such large porosity and theπ-electron walls of TATAB^(3-),the adsorption performance of 1 as a representative for five kinds of dyes in aqueous solution and iodine in cyclohexane solution were studied.Interestingly,1 displayed a highly sensitive and selective adsorption behaviour to the cationic dye methylene blue(MB).Moreover,the iodine-adsorption experimental results demonstrated that 1 had a reversible adsorption effect on iodine with an adsorption capacity of 758.72 mg·g^(-1).展开更多
基金supported by the grants of the National Natural Science Foundation of China(No.21571091)Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,P.R.China(project no.191001-K).
文摘Exploring the adsorption of small molecules,such as dyes and iodine,by using novel functionalized MOFs has aroused widespread interest.In this work,seven isostructural compounds were synthesized successfully under solvothermal condition,namely[Ln_(2)(TATAB)_(2)]·xDMF·yH_(2)O(1-7;Ln=Eu^(3+),Gd^(3+),Tb^(3+),Dy^(3+),Ho^(3+),Er^(3+)and Y^(3+)),by the reaction of 4,4′,4″-((1,3,5-triazine-2,4,6-triyl)tri(azanediyl))tribenzoic acid(H_(3)TATAB)and rare earth metal ions.X-Ray diffraction analysis revealed that a window-shaped 3D structure was formed by“paddle wheel”-type[Ln_(2)(CO_(2))_(6)]secondary structural units connected to eight H_(3)TATAB ligands,in which the channel size reached 2.73 nm and the available volumes of all the compounds surpassed 61%.Considering such large porosity and theπ-electron walls of TATAB^(3-),the adsorption performance of 1 as a representative for five kinds of dyes in aqueous solution and iodine in cyclohexane solution were studied.Interestingly,1 displayed a highly sensitive and selective adsorption behaviour to the cationic dye methylene blue(MB).Moreover,the iodine-adsorption experimental results demonstrated that 1 had a reversible adsorption effect on iodine with an adsorption capacity of 758.72 mg·g^(-1).
