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Two alkynyl functionalized Co(II)-MOFs as fluorescent sensors exhibiting selectivity and sensitivity for Fe3+ and nitroaromatic compounds |
Yue Lia, Xia Wanga, Chengyong Xinga, Xiurong Zhanga, Zelong Liangb, Xiaokang Wanga, Kai Zhanga, Yutong Wanga, Di Liuc, Weidong Fana, Fangna Daia |
a School of Materials Science and Engineering, College of Science, China University of Petroleum(East China), Qingdao 266580, China;
b College of Chemical Engineering, China University of Petroleum(East China), Qingdao 266580, China;
c College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China |
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Guide Two alkynyl functionalized 3D frameworks with different structures were successfully synthesized for selective and sensitive detection of Fe3+ ions and nitroaromatic compounds through fluorescence quenching. |
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Abstract Two Co(Ⅱ)-MOFs with different structures were successfully synthesized under the premise of designing two ligands containing alkynyl functional groups. Complexes 1 ([Co(TEPA)(TPT)2/3]·2DMF·H2O) and 2 ([Co(EPA)(TPT)]·1.5DMF·1.5H2O) show excellent luminescence properties. Meanwhile, as fluorescent sensors, complexes 1 and 2 exhibit selectivity and sensitivity for Fe3+ with the Ksv of 1.520 ×104 L/mol and 3.543×104 L/mol, which can rapidly detect nitroaromatic compounds in methanol and ethanol, especially for 2,4-NPH through fluorescence quenching with high quenching efficiency. In particular, the Ksv value of complexes 1 and 2 towards 2,4-NPH can reach up to 1.627×105 L/mol and 9.600×104 L/mol, demonstrating that complexes 1 and 2 are good candidates for the identification and detection of Fe3+ and nitroaromatic compounds.
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Received: 18 February 2019
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Fund:This work was supported by the National Natural Science Foundation of China (NSFC, No. 21771191), the Taishan Scholar Foundation (No. ts201511019), the Shandong Natural Science Fund (No. ZR2017QB012),the Fundamental Research Funds for the Central Universities (Nos. 16CX05015A, 18CX06003A, YCX2018071). |
Corresponding Authors:
Weidong Fan, Fangna Dai
E-mail: weidongfan@163.com;fndai@upc.edu.cn
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