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Two‐dimensional π‐conjugated metal‐organic framework with high electrical conductivity for electrochemical sensing
Author(s) -
Wu Fei,
Fang Wei,
Yang Xueyuan,
Xu Jiaoyan,
Xia Jianfei,
Wang Zonghua
Publication year - 2019
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201800198
Subject(s) - chemistry , electrochemistry , delocalized electron , conjugated system , electrode , metal organic framework , electrical resistivity and conductivity , conductivity , detection limit , metal , redox , selectivity , metal ions in aqueous solution , inorganic chemistry , chemical engineering , nanotechnology , polymer , organic chemistry , materials science , adsorption , chromatography , electrical engineering , catalysis , engineering
A two‐dimensional π‐conjugated metal‐organic framework (MOF) with long‐range delocalized electrons has been prepared and applied as modified electrode material without further post‐modification. The MOF (Cu 3 (HHTP) 2 ) is composed of Cu(II) centers and a redox‐active linker (2,3,6,7,10,11‐hexahydroxytriphenylene, HHTP). Compared to most MOFs, Cu 3 (HHTP) 2 displays higher electrical conductivity and charge storage capacity owing to the collective effect of metal ions and aromatic ligands with π–π conjugation. In order to confirm the superior properties of this material, the electrochemical detection of dopamine (DA) was conducted and the satisfactory results were obtained. The currents increase linearly with the concentration of DA in the range 5.0 × 10 −8 to 2.0 × 10 −4 M with a detection limit of 5.1 nM. Furthermore, Cu 3 (HHTP) 2 presents high selectivity and applicability in serum samples for electrochemical DA sensing. Overall, this material has excellent potential as a promising platform for establishing an MOF‐based electrochemical sensor.