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Metal-Organic Frameworks Based on Tetraphenylpyrazine Derived Tetracarboxylic Acid for Electrocatalytic Hydrogen Evolution Reaction and NACs Sensing

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 by 2,3,5,6-(4-carboxyl-tetraphenyl)pyrazine (H4TCPP) with various metal salts under hydrothermal conditions and 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 the point symbol of {410}{414.6}{434.621}. Compound 3 features an (4, 8)-connected 3D network built up by a binuclear La cluster with the point symbol of {416.612}{44.62}2. Compound 4 demonstrates a 5-nodal (4, 5, 6, 7, 8)-connected network with the {410.65}{412.69}{418.610}{46}{47.63} topology. Compound 5 exhibits a 3D interlocked eight-connected 20-c net with the point symbol of {378.498.514}, while compound 6 forms a 3, 4, 4, 5, 17-connected net with the 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 the all MOFs exhibit improved performance compared to that of ligand H4TCPP for HER with the lowest onset overpotentials of 244 mV and the smallest Tafel slopes of 248 mV dec-1 , respectively.

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Publication details

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


Article type: Paper
DOI: 10.1039/C8CE01868E
Citation: CrystEngComm, 2018, Accepted Manuscript
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    Metal-Organic Frameworks Based on Tetraphenylpyrazine Derived Tetracarboxylic Acid for Electrocatalytic Hydrogen Evolution Reaction and NACs Sensing

    T. wang, K. Huang, M. Peng, X. Li, D. Han, L. jing and D. Qin, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE01868E

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