Electrochemical sensor based on molecularly imprinted polymer coating on metal–organic frameworks for the selective and sensitive determination of carbendazim

• Published in: Microchemical journal 2022-08, Vol.179, p.107633, Article 107633
• Main Authors: Beigmoradi, Fariba, Rohani Moghadam, Masoud, Bazmandegan-Shamili, Alireza, Masoodi, Hamid Reza
• Format: Article
• Language: English
• Subjects: Carbendazim pesticide; Electrochemical sensor; MIPs; MOF
• ISSN: 0026-265X; 1095-9149
• DOI: 10.1016/j.microc.2022.107633

[Display omitted] •Molecularly imprinted polymer (MIP) coated on metal–organic framework (HKUST-1) were synthesized and used in graphite-epoxy (GE) electrode.•The fabricated electrode was applied for the first time in the electrochemical determination of CBZ.•Interaction energy between CBZ and MIP was measured based on quantum mechanics calculations.•The HKUST-1@MIPs-GE electrode was shown excellent precision, outstanding selectivity, good linear range, and low detection limit. In this work, a graphite-epoxy (GE) electrode was modified with molecularly imprinted polymer (MIP) and Cu-metal–organic framework (Cu-MOF; Cu(II)/benzene-1,3,5-tricarboxylic). The novel modified electrode was proposed to determine carbendazim (CBZ) in some fruits. [Cu3(BTC)2(H2O)3]n (HKUST-1) was synthesis via solvothermal method. Carbendazim (template), methacrylic acid (functional monomer), and ethylene glycol dimethyacrylate (cross-linker) were used for the synthesis of MIP on the surface of HKUST-1. The HKUST-1@MIP were characterized by fourier transform infrared spectroscopy, X-ray diffraction, and field-emission scanning electron microscopy. The electrochemical behavior of HKUST-1@MIP-GE sensor was investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). Under optimum conditions the proposed electrode provided a linear concentration range of 0.01–50.00 µmolL−1, with a detection limit of 2 nmolL−1. The RSD% for six successive determinations of 0.80 and 25.00 µmol L-1 CBZ were 2.4% and 2.1%, respectively.