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A dual-functional MOF for high proton conduction and sensitive detection of ascorbic acid

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Abstract

A new metal–organic framework (MOF), [Eu2(HBDPP)2(H2O)2(DMF)2](H2O)2 (H4BDPP = 3,5-bis(3,5-dicarboxylphenyl) pyridine; DMF = N,N-dimethylformamide) (Eu-MOF), has been successfully synthesized under solvothermal conditions. A 1D chain was formed by the adjacent Eu2(COO)24+ dinuclear cluster and HBDPP3−, and further connected by HBDPP3− to form an infinitely extended 3D structure. In order to further improve the proton conductivity of the Eu-MOF, imidazole was encapsulated in its pores to form a composite material named Im@Eu-MOF. AC impedance analysis shows that the highest proton conductivity of the Im@Eu-MOF reaches up to 4.53 × 10−4 S cm−1 at 348 K and 98% RH, which is about 10 times higher than that of the Eu-MOF. In addition, the Eu-MOF can be considered an excellent luminescence-based sensor with a high sensitivity and low detection limit (0.1 μM) for the detection of trace amounts of ascorbic acid.

Graphical abstract: A dual-functional MOF for high proton conduction and sensitive detection of ascorbic acid

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Article information


Submitted
12 Aug 2020
Accepted
21 Sep 2020
First published
23 Sep 2020

Dalton Trans., 2020, Advance Article
Article type
Paper

A dual-functional MOF for high proton conduction and sensitive detection of ascorbic acid

S. Zhou, B. Hao, T. Lin, C. Zhang and Q. Wang, Dalton Trans., 2020, Advance Article , DOI: 10.1039/D0DT02834G

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