Controlled synthesis of Cu-MOF possessing peroxidase-mimetic activity for the colorimetric detection of tetracycline in aqueous solution. (30th March 2023)

• Record Type: Journal Article
• Authors: Nehra, Monika; Kumar, Rajesh; Dilbaghi, Neeraj; Kumar, Sandeep
• Is Part Of: New journal of chemistry. Volume 47:Number 16(2023)
• Page Start: 7595
• Page End: 7603
• Publication Date: 2023-03-30
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d3nj00218g
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Peroxidase-mimetic activity of highly crystalline Cu-MOF helps in sensitive and selective colorimetric detection of tetracycline. Abstract : In recent years, antibiotic pollution has become a major concern due to their excessive exposure to humans and the environment. However, the existing instrument-dependent and time-consuming conventional detection approaches are not feasible for the real-time detection of antibiotics at the field level. Herein, two Cu-based metal–organic frameworks (Cu-btc) with the same stoichiometry were synthesized under different reaction conditions. The hydrothermal approach resulted in better structural and crystalline properties of Cu-btc (named as Cu-MOF2) than the preparation under normal laboratory conditions (Cu-MOF1). The high peroxidase-like activity of Cu-MOF2 was further utilized to develop a colorimetric assay for the detection of tetracycline in water. The presence of multiple O- and N-functional groups in tetracycline led the formation of tetracycline–Cu 2+ complexes. Tetracycline itself did not cause any change in the color of the TMB-H2 O2 system, but it could effectively hinder the colorimetric reaction of TMB with H2 O2 in the presence of Cu-MOF2. The designed system demonstrated a low detection limit of 0.23 μM with a limit of quantification of 0.69 μM. The performance of this colorimetric assay was also examined in the presence of other possible interfering antibiotics. The good biocompatibility of this sensing platform increases its potential for in vitro biosensing applications.