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Issue 3, 2019
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Metal–organic frameworks based on tetraphenylpyrazine-derived tetracarboxylic acid for electrocatalytic hydrogen evolution reaction and NAC sensing

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Abstract

A series of metal–organic frameworks (MOFs), namely {[Cd(H2TCPP)]·2H2O}n (1), {[Pb2(TCPP)]}n (2), {[La(H2TCPP)]·3.7H2O}n (3), {[Sr3(HTCPP)2]·6H2O}n (4), {[Ce(HTCPP)]·H2O}n (5) and {[Mn2(TCPP)]·2.13H2O}n (6), are prepared from 2,3,5,6-(4-carboxyl-tetraphenyl)pyrazine (H4TCPP) with various metal salts under hydrothermal conditions and are well characterized. The structural analysis shows that compound 1 presents a 2-fold interpenetrating structure, which exhibits a uninodal 4-c net with a {66}{6·6·6·6(2)·6(2)·6(2)} topology. Compound 2 shows a 3-nodal (5,6,11)-connected 3D framework with a point symbol of {410}{414·6}{434·621}. Compound 3 features a (4,8)-connected 3D network built from a binuclear La cluster with a point symbol of {416·612}{44·62}2. Compound 4 demonstrates a 5-nodal (4,5,6,7,8)-connected network with a {410·65}{412·69}{418·610}{46}{47·63} topology. Compound 5 exhibits a 3D interlocked eight-connected 20-c net with a point symbol of {378·498·514}, while compound 6 forms a 3,4,4,5,17-connected net with a point symbol of {4·52}2{432·56·684·74·810}{45·5}{46}{48·52}. In addition, almost all the MOFs display significant fluorescence quenching behaviors by the addition of various nitro-aromatic compounds (NACs), especially TNP. More importantly, six new MOFs have been further investigated to evaluate their electrocatalytic activities for the hydrogen evolution reaction (HER). The results demonstrate that all the MOFs exhibit improved performance compared to ligand H4TCPP for the HER with the lowest onset overpotential of 244 mV and the smallest Tafel slope of 248 mV dec−1, respectively.

Graphical abstract: Metal–organic frameworks based on tetraphenylpyrazine-derived tetracarboxylic acid for electrocatalytic hydrogen evolution reaction and NAC sensing

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Publication details

The article was received on 01 Nov 2018, accepted on 20 Nov 2018 and first published on 21 Nov 2018


Article type: Paper
DOI: 10.1039/C8CE01868E
Citation: CrystEngComm, 2019,21, 494-501

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    Metal–organic frameworks based on tetraphenylpyrazine-derived tetracarboxylic acid for electrocatalytic hydrogen evolution reaction and NAC sensing

    T. Wang, K. Huang, M. Peng, X. Li, D. Han, L. Jing and D. Qin, CrystEngComm, 2019, 21, 494
    DOI: 10.1039/C8CE01868E

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