title: The development of a new optical sensor based on the Mn doped ZnS quantum dots modified with the molecularly imprinted polymers for sensitive recognition of florfenicol.
abstract: The Mn doped ZnS quantum dots (Mn:ZnS QDs) capped with the florfenicol molecularly imprinted polymer (Mn:ZnS QDs@MIP) were prepared via the sol-gel surface imprinting approach using 3-aminopropyltriethoxysilane (APTES) as the functional monomer and tetraethoxysilane (TEOS) as the cross-linker for the optosensing of the florfenicol. Transmission electron microscopy (TEM), X-ray diffractometer, IR spectroscopy, UV-Vis absorption spectrophotometry, and spectrofluorometry were used to elucidate the formation, morphology, and identification of the products. To illustrate the usefulness of the new imprinted material, the non-imprinted coated Mn:ZnS QDs (Mn:ZnS QDs@NIP) were synthesized without the presence of the florfenicol. It was revealed that the fluorescence (FL) intensity of the Mn:ZnS QDs@MIP increased with increasing the FF concentration. Under the optimal conditions, changes in the FL intensity in the presence of the target molecule showed a linear response in the concentration range of 30-700 μmol L(-1) with a detection limit of 24 μmol L(-1). The developed method was finally applied successfully to the determination of FF in different meat samples with satisfactory recoveries.
authors.affiliation: Department of Chemistry, Faculty of Science, University of Birjand, Birjand, Iran. Electronic address: ssadeghi@birjand.ac.ir.
authors.forename: Susan
authors.initials: S
authors.lastname: Sadeghi
authors.affiliation: Department of Chemistry, Faculty of Science, University of Birjand, Birjand, Iran.
authors.forename: Moslem
authors.initials: M
authors.lastname: Jahani
authors.affiliation: Department of Chemistry, Faculty of Science, University of Birjand, Birjand, Iran.
authors.forename: Foroogh
authors.initials: F
authors.lastname: Belador
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000032:analysis*; D002645:Chickens; D005399:Fishes; D005504:Food Analysis / Q000379:methods; D057230:Limit of Detection; D008345:Manganese / Q000737:chemistry*; D008460:Meat / Q000032:analysis*; D054802:Molecular Imprinting; D044367:Phase Transition; D011108:Polymers / Q000737:chemistry*; D011437:Propylamines; D045663:Quantum Dots / Q000737:chemistry; D012821:Silanes / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000379:methods; D013440:Sulfides / Q000737:chemistry*; D013839:Thiamphenicol / Q000031:analogs & derivatives* / Q000032:analysis; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; D011108:Polymers; D011437:Propylamines; D012821:Silanes; D013440:Sulfides; D017967:Zinc Compounds; C040733:tetraethoxysilane; D008345:Manganese; C035534:florfenicol; D013839:Thiamphenicol; C031238:zinc sulfide; C477625:amino-propyl-triethoxysilane
keywords: Florfenicol; Fluorescence optosensor; Mn doped ZnS quantum dots; Sol–gel; Surface molecularly imprinted polymer