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Journal Article

Squarate-based metal-organic frameworks for highly selective and sensitive electrochemical sensing of dopamine


Zheng,  Xinyue
Nieves Lopez Salas, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Zhang, W., Zheng, X., Jia, G., Chi, H. Z., Lin, B., Qin, H., et al. (2022). Squarate-based metal-organic frameworks for highly selective and sensitive electrochemical sensing of dopamine. Journal of the Electrochemical Society, 169(11): 116504. doi:10.1149/1945-7111/ac9f7c.

Cite as: https://hdl.handle.net/21.11116/0000-000B-6757-0
Dopamine (DA) is an important catecholamine neurotransmitter associated with learning, depression, addiction, and memory loss with simultaneously coordinating the movement and reward-associated behavior. It is very important to design highly effective and sensitive sensors for the detection of DA. However, it remains a challenge for detecting DA to obtain selectively and rapidly sensing materials. In this work, we chose octahedral-coordinated squarate-based MOFs with dense Lewis active centers as electrode materials to investigate the electrochemical performance of dopamine oxidation. The multiple ligand functional groups in squarate-based MOFs enable noncovalent interaction with diols, amines, and phenyl groups of DA molecules through electrostatic, H-bonding, and/or π-π stacking interactions. The modified electrode exhibits a wide linear current response range between 2 μM and 400 μM for DA, and the sensor shows significant selectivity and stability. This work enriches the application library of redox-active squarate compounds and can give us a better comprehension of the design and selection of electrode materials for electrochemical sensing and even more catalysis-related research.