Two alkynyl functionalized Co(II)-MOFs as fluorescent sensors exhibiting selectivity and sensitivity for Fe<sup>3+</sup> and nitroaromatic compounds

doi:10.1016/j.cclet.2019.03.014

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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.

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 K_sv 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 K_sv 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.

Key words： Metal-organic frameworks Alkynyl functionalized Fluorescence sensor Fe³⁺ ion Nitroaromatic compounds

Received: 18 February 2019

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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	Yue Li
	Xia Wang
	Chengyong Xing
	Xiurong Zhang
	Zelong Liang
	Xiaokang Wang
	Kai Zhang
	Yutong Wang
	Di Liu
	Weidong Fan
	Fangna Dai

Cite this article:

Yue Li,Xia Wang,Chengyong Xing, et al. Two alkynyl functionalized Co(II)-MOFs as fluorescent sensors exhibiting selectivity and sensitivity for Fe³⁺ and nitroaromatic compounds[J]. Chinese Chemical Letters, 2019, 30(07): 1440-1444.

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http://www.chinchemlett.com.cn/EN/10.1016/j.cclet.2019.03.014 OR http://www.chinchemlett.com.cn/EN/Y2019/V30/I07/1440

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