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Highly selective and turn-on fluorescence probe with red shift emission for naked-eye detecting Al^(3+)and Ga^(3+)based on metal-organic framework

查看全文 作　　者：Linhui [1]Wu;Shuli [1]Yao;Hui [1]Xu;Tengfei [1]Zheng;Suijun [1]Liu;Jinglin [1]Chen;Na [2]Li;Herui [1]Wen 高影响力作者 机构地区：[1]School of Chemistry and Chemical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;[2]School of Materials Science and Engineering,Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry,Nankai University,Tianjin 300350,China高影响力机构 出　　处：《Chinese Chemical Letters》索引2022年第33卷第1期,共6页高影响力期刊 基　　金：supported from the National Natural Science Foundation of China(Nos.22061019,21761012 and 21861018);the Natural Science Foundation of Jiangxi Province(Nos.20192BAB203001,20202ACBL213001,20192ACBL20013 and 20182BCB22010);the Youth Jinggang Scholars Program in Jiangxi Province(No.QNJG2019053);the Two Thousand Talents Program in Jiangxi Province(No.jxsq2019201068)。 摘　　要：A novel ZnII-based metal-organic framework with the formula of{[Zn_(2)(BBIP)_(2)(NDC)_(2)]·H_(2)O}n(JXUST-5)derived from 3,5-bis(benzimidazol-1-yl)pyridine(BBIP)and 1,4-naphthalenedicarboxylic acid(H_(2)NDC)has been synthesized.The adjacent Zn^(II)ions are linked through two BBIP ligands to form a[Zn_(2)(BBIP)_(2)]secondary building unit(SBU).The neighbouring SBUs are further connected by NDC^(2-)withμ2-η^(1):η^(1)andμ2-η^(1):η^(1):η^(1)bridging modes to form a two-dimensional(2D)framework.Topological analysis shows that JXUST-5 could be simplified as an uninodal fes topology with a point symbol of{4.8^(2)}.Furthermore,the 2D framework net could be extended through C-H···πinteraction to form the three-dimensional supramolecular structure.Luminescent experiments suggest that JXUST-5 could selectively and sensitively recognize Al^(3+)and Ga^(3+)through fluorescence enhancement effect along with a relatively large red shift.The detection limits for Al^(3+)and Ga^(3+)are 0.17 and 0.69 ppm,respectively.Interestingly,the sensing process for both Al^(3+)and Ga^(3+)could be directly observed with naked eyes under 365 nm UV lamp.Notably,JXUST-5 could be recycled at least five times as a fluorescent sensor toward Al^(3+)and Ga^(3+),which is the second example of turn-on MOF based fluorescent sensor toward Ga^(3+). 关 键 词：Metal-organic frameworks Fluorescence probe Naked-eye detection Turn-on effect Red shift emission Al^(3+)and Ga^(3+)
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