A fluorescent Eu(Ⅲ) MOF for highly selective and sensitive sensing of picric acid  

作　　者：Qianqian Chen Jiahui Cheng Jin Wang Liang Li Zhipeng Liu Xinhui Zhou Yujian You Wei Huang 

机构地区：[1]Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials(IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications [2]School of Telecommunication and Information Engineering, Nanjing University of Posts & Telecommunications [3]Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center forAdvanced Materials (SICAM), Nanjing Tech University (Nanjing Tech) [4]Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU)

出　　处：《Science China Chemistry》2019年第2期205-211,共7页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (61575096);Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) (YX03001);Jiangsu Province Double Innovation Talent Program (090300014001);Nanjing University of Posts & Telecommunications (NY212004, NY217074);Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX17_0748 and KYCX18_0857)

摘　　要：A metal-organic framework [Eu_3L_3(CH_3COO)_2(H_2O)_2(μ_3-OH)]·3 DMF,(EuL, H_2L=9H-carbazole-2,7-dicarboxylic acid,DMF=N,N-dimethylformamide) has been synthesized under solvothermal conditions and structurally characterized. In EuL,Eu_6O_8 clusters are four-bridged by carboxylates to form parallel-aligned Eu–O–C chains, which are further linked by the carbazole moieties of L^(2-) ligands to form the three-dimensional framework with rhombic channels. The EuL material with characteristic emission of Eu^(3+) ion exhibits significant luminescence quenching response for picric acid(PA) and the linear Stern-Volmer plot was observed in the concentration range of 0.05–0.15 mM with K_(sv) of 98074 M^(-1). As far as we know, this Ksv is among the highest values for COFs and MOFs in detection of PA. The excellent anti-interference ability and repeatability were also verified by experiments. Lastly, we investigated the luminescence quenching mechanism in the EuL sensing system.A metal-organic framework [Eu_3L_3(CH_3COO)_2(H_2O)_2(μ_3-OH)]·3 DMF,(EuL, H_2L=9H-carbazole-2,7-dicarboxylic acid,DMF=N,N-dimethylformamide) has been synthesized under solvothermal conditions and structurally characterized. In EuL,Eu_6O_8 clusters are four-bridged by carboxylates to form parallel-aligned Eu–O–C chains, which are further linked by the carbazole moieties of L^(2-) ligands to form the three-dimensional framework with rhombic channels. The EuL material with characteristic emission of Eu^(3+) ion exhibits significant luminescence quenching response for picric acid(PA) and the linear Stern-Volmer plot was observed in the concentration range of 0.05–0.15 mM with K_(sv) of 98074 M^(-1). As far as we know, this Ksv is among the highest values for COFs and MOFs in detection of PA. The excellent anti-interference ability and repeatability were also verified by experiments. Lastly, we investigated the luminescence quenching mechanism in the EuL sensing system.

关 键 词：EUROPIUM METAL-ORGANIC frameworks picric ACID sensor 

分 类 号：O657.3[理学—分析化学]