Morphology-dependent electrochemical sensing performance of metal (Ni, Co, Zn)-organic frameworks

Liudi Ji; Yunshan Jin; Kangbing Wu; Chidan Wan; Nianjun Yang; Yong Tang

doi:10.1016/j.aca.2018.06.008

Morphology-dependent electrochemical sensing performance of metal (Ni, Co, Zn)-organic frameworks

Anal Chim Acta. 2018 Nov 15:1031:60-66. doi: 10.1016/j.aca.2018.06.008. Epub 2018 Jun 5.

Authors

Liudi Ji¹, Yunshan Jin¹, Kangbing Wu², Chidan Wan³, Nianjun Yang⁴, Yong Tang⁵

Affiliations

¹ Key Laboratory for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
² Key Laboratory for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China. Electronic address: kbwu@hust.edu.cn.
³ Department of Hepatobiliary Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
⁴ Institute of Materials Engineering, University of Siegen, Siegen, 57076, Germany.
⁵ Department of Hepatobiliary Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China. Electronic address: tangyong_2222@126.com.

PMID: 30119744
DOI: 10.1016/j.aca.2018.06.008

Abstract

To clarify the morphology effect of metal-organic frameworks (MOFs) on their electrochemistry as well as to explore their electrochemical applications, three MOFs with metal centers of nickel, cobalt, and zinc are synthesized. The used organic ligand is only 1,3,5-benzenetricarboxylic acid. Characterizations using Fourier Transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and electrochemical techniques reveal that these MOFs possess similar bonding properties, crystalline structures and phase purity, but various morphology and electrochemical activities, including their own redox behavior, electrochemical response toward redox probes and analytes in solutions. As a case study of analytes, voltammetry of Ponceau 4R is investigated on three MOFs. Its sensitive and selective monitoring is further achieved on nickel MOFs with a linear range from 0.5 to 150 nM and a detection limit of 80 pM. Therefore, the morphology of MOFs determines electrochemistry of MOFs and their electrochemical sensing applications.

Keywords: Electrochemical sensing; Electrochemistry; Metal-organic frameworks; Morphology.