Turn-on fluorescence detection of specific inorganic anions by Zr(Ⅳ)-MOF with amino-functional group  

作　　者：Jing Dong Shi-Qing Wang Xiao-Yu Zhang Zi-Qing Huang Xiu-Du Zhang Wei-Yin Sun 

机构地区：[1]Coordination Chemistry Institute,State Key Laboratory of Coordination Chemistry,School of Chemistry and Chemical Engineering,Nanjing National Laboratory of Microstructures,Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210023,China [2]Scientific Research Institute,Nanjing Tech University,Nanjing 211816,China [3]College of Chemistry and Materials Science,Key Laboratory of Functional Molecular Solids Ministry of Education,Anhui Laboratory of Molecule-Based Materials,Anhui Key Laboratory of Functional Molecular Solids,Anhui Normal University,Wuhu 241002,China

出　　处：《Tungsten》2023年第2期217-224,共8页钨科技（英文）

基　　金：the National Natural Science Foundation of China (grant No.22171131) for financial support of this work;supported by a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions

摘　　要：Inorganic anions such as phosphates and carbonates are essential in the natural system and it is important for the detec-tion of such species.In this work,the fluorescence sensing capacity of Zr(IV)framework with an amino-functional group,namely UiO-66-NH_(2),towards specific inorganic anions was investigated in aqueous media.The results revealed that the fluorescence emission intensity of UiO-66-NH2 could be strongly enhanced by phosphate and carbonate anions including HPO_(4)^(2-),H_(2)PO_(4)^(-),PO_(4)^(3-),P_(2)O_(7)^(4-),HCO_(3)^(-)and CO_(3)^(2-),implying its sensing capacity towards phosphate and carbonate anions.Furthermore,fluorescence titration experiments exhibit that the emission intensity enhancement ratio depends linearly on the concentration of anions,suggesting the possibility of quantitative detection of these anions.Further studies suggest that the sensing of UiO-66-NH,towards HPO_(4)^(2-)/PO_(4)^(3-)/P_(2)O_(4)^(-)/HCO_(3)^(-)/CO_(2)-could be ascribed to the collapse of the framework,while that for H_(2)PO_(4)-could be attributed to the adsorption of H,PO4-by UiO-66-NH2 with hydrogen bonding interactions between H,PO4-and the amino group of UiO-66-NH_(2) supported by the different fluorescence response of UiO-66 and UiO-66-NH,towards the anions.

关 键 词：Zr(IV)framework UiO-66-NH_(2) ANIONS Sensing Turn-on fluorescence 

分 类 号：O657.3[理学—分析化学]