A magnetic molecularly imprinted fluorescent sensor for the sensitive and convenient determination of ciprofloxacin or norfloxacin in human urine was synthesized and characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, ultraviolet/visible spectroscopy, and fluorescence spectroscopy. Both cadmium telluride quantum dots and ferroferric oxide nanoparticles are introduced into the polymer for the rapid separation and detection of the target molecules. The synthesized molecularly imprinted polymers were applied to detect ciprofloxacin or its structural analog norfloxacin in human urine with the detection limit 130 ng/mL. A computational study was developed to evaluate the template-monomer geometry and interaction energy in the polymerization mixture to determine the reaction molar ratio of the template and monomer molecules.
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http://dx.doi.org/10.1002/jssc.201401014 | DOI Listing |
Int J Med Mushrooms
December 2024
School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, People's Republic of China; Shandong Provincial Collaborative Innovation Center for Quality Control and Construction of the Whole Industrial Chain of Traditional Chinese Medicine, Jinan, Shandong, 250355, People's Republic of China.
In this work, magnetic molecularly imprinted polymer (MMIP) capable of selectively recognizing and adsorbing cordycepin was prepared. The MMIP was prepared using cordycepin as the template molecule, methacrylic acid and acrylamide as the functional monomer and ethylene glycol dimethacrylate as the crosslinker. The MMIP was analyzed using various techniques including transmission electron microscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, vibrating sample magnetometer and x-ray diffraction.
View Article and Find Full Text PDFTalanta
December 2024
Leverhulme Research Centre for Forensic Science, School of Science and Engineering, University of Dundee, Dundee, DD1 4HN, UK.
Diazepam (DZP) is a muscle-relaxing, anxiety-relieving sedative drug; nonetheless, it is also an addictive drug that may be abused. This work reports on the development of a novel electrochemical nanosensor for diazepam using SiO-encapsulated-3-mercaptopropionic acid-capped AuZnCeSeS quantum dots (QDs) overcoated with a molecularly imprinted polymer (MIP) on screen-printed carbon electrodes (SPCEs). Electrochemical, spectroscopic and electron microscopic characterization of the nanomaterial and modified electrode surface was carried out and is reported herein.
View Article and Find Full Text PDFJ Hazard Mater
December 2024
State Key Laboratory of Pollution Control and Resources Reuse (Tongji University), College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. Electronic address:
Per- and polyfluoroalkyl substances (PFAS) have raised significant concerns; however, their accurate detection in aqueous environments remains a major challenge. In this study, a host-guest molecularly imprinted polymer-based electrochemical sensor with enhanced antifouling properties were developed using β-cyclodextrin embedded with methylene blue (βCD-MB MIP). This sensor demonstrated sensitive and selective quantification of perfluorooctanoic acid (PFOA) in real water samples.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
December 2024
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China. Electronic address:
A new magnetic-liquid crystal nanosurface molecularly imprinted polymer (5CB-FeO@MIP) resonance Rayleigh scattering temperature sensor was prepared, using liquid crystal 4'-cyano-4'-pentylbiphenyl as the temperature sensing element, nano-FeO as the substrate, methacrylic acid as the functional monomer and ethylene glycol dimethacrylate as the crosslinking agent. It was characterized by molecular spectroscopy, scanning electron microscopy and Fourier transform infrared spectroscopy. The thermosensitive effect of 11 liquid crystals, that is, the relationship between RRS and temperature, was studied.
View Article and Find Full Text PDFBackground: Ciprofloxacin is a widely used antibiotic in medicine and agriculture. It can cause pollution to the environment and food, thereby affecting human health.
Objective: This study proposes the preparation of molecular imprinted fluorescent sensors and their selective detection of ciprofloxacin, with the aim of achieving specific recognition and accurate detection of ciprofloxacin.
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