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Water‐soluble glutathione‐CdS QDs with exceptional antimicrobial properties synthesized via green route for fluorescence sensing of fluoroquinolones

Author:
Malik, Rupal, Pinnaka, Anil Kumar, Kaur, Manpreet, Kumar, Vinod, Tikoo, Kulbhushan, Singh, Sandeeep, Kaushik, Anupama, Singhal, Sonal
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.4 pp. 1082-1090
ISSN:
0268-2575
Subject:
Gram-negative bacteria, Gram-positive bacteria, anti-infective agents, antibiotic resistance, antimicrobial properties, detection limit, fluorescence, fluoroquinolones, food industry, glutathione, quantum dots, water solubility
Abstract:
BACKGROUND: Continual emergence of quinolones in the environment has raised concerns and the repercussions are almost unimaginable. Along with this an increase of antibiotic resistance in microbes has encouraged the pharmaceutical and food industry to create new antimicrobial agents. Nano‐range materials with exceptional antimicrobial properties synthesized via green routes for fluorescence sensing of fluoroquinolones have rarely been reported. RESULTS: A facile, eco‐friendly and green approach was utilized for the synthesis of water soluble glutathione (GSH) functionalized CdS quantum dots (QDs) for the selective detection of fluoroquinolones. The prepared QDs exhibited a strong emission peak at 460 nm and the addition of fluoroquinolones caused enhancement and significant blue shift (∼ 50 nm) in the intensity, revealing sensitive and selective detection of fluoroquinolones. The limit of detection was found to be 2.2 µmol L‐¹. Also, antimicrobial activities of the QDs were assessed against both Gram positive and Gram negative bacteria and the QDs were found to be effective against the Gram positive bacteria especially Bacillus species in comparison with the Gram negative bacteria. CONCLUSIONS: The current study offers a green route to synthesize water soluble and stable QDs for sensing with exceptional antimicrobial properties. © 2018 Society of Chemical Industry
Agid:
6327067