Abstract
An electrochemical sensor composed of conductive metal-organic framework [Ni3(HITP)2] and molecular imprinted polymers (MIP) is fabricated to detect dopamine. Ni3(HITP)2 promotes electrons transfer due to the structure of in-plane charge delocalization and layered expansion conjugation. The combination of MIP with Ni3(HITP)2 improves the selectivity and conductivity, exhibiting a wide detection range (0.06 ~ 200µM) and a low detection limit (0.109µM). The kinetic mechanism on the electrode surface is an adsorption controlled process, with the equal number of electrons and protons participating in oxidation in the electrocatalytic process of catechol converting to o-quinone.
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