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Fluorescent sensing copolymers: Synthesis, nanofiber fabrication and application in picric acid sensors.
Heliyon
December 2024
Department of Chemical Engineering, National Cheng Kung University, Tainan, 702, Taiwan.
Increasing attention has been paid to the detection of explosives due to the occurrence of terrorist attacks around the world. Here, we used free radical polymerization to develop two different types of fluorescent copolymers for use in detecting picric acid. One exhibits aggregation-caused quenching (ACQ) and is called PNNS [poly (-isopropyl acrylamide---hydroxymethyl acrylamide --styrene-pyrene), poly (NIPAAm--NMA--St-Py)].
View Article and Find Full Text PDFCatalytic Role of Methanol in Anodic Coupling Reactions Involving Alcohol Trapping of Cation Radicals.
J Org Chem
December 2024
School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States.
Article Synopsis
- - In anodic electrosynthesis, cation radicals are important intermediates that can be attacked by nucleophiles or undergo deprotonation, affecting the yield of chemical products based on competing pathways.
- - The study uses computational methods to analyze how methanol influences the trapping of enol ether cation radicals, revealing that methanol enhances the rate of specific reactions through a second-order kinetic process.
- - The formation of a "Zundel-like" conformation with methanol assists both intramolecular and solvent-mediated attacks on the cation radicals, leading to very low energy barriers for these reactions and resulting in unique kinetics based on the structure of the substrate.
Biological control of nosemosis in Apis mellifera L. with Acacia nilotica extract.
Sci Rep
November 2024
Chemistry Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt.
Nosemosis is one of the most devastating diseases of Apis mellifera (Honey bees) caused by the single-celled spore-forming fungi Nosema apis, N. ceranae and N. neumanii, causing a severe loss on the colony vitality and productivity.
View Article and Find Full Text PDFUnveiling the therapeutic potential of leaves: Exploring antioxidant, anti-inflammatory, anti-arthritic, and cytotoxic activities through biological and molecular docking evaluation with DFT analysis.
Heliyon
October 2024
Department of Agricultural Sciences, University of Naples Federico II, 80055, Portici, Naples, Italy.
Background: is a common tropical seacoast flowering plant from the family of Fabaceae which is reported as bay bean and coastal jack bean; has a wide range of therapeutic and nutraceutical properties.
Aim: The present research aims to explore some pharmacological insights of the methanol extract of leaves (MECR) and its chloroform fraction (CFCR) and n-hexane fraction (NFCR) through and approaches.
Methods: Different fractions of were subjected to ferric reduction assay and total phenolic and flavonoid content assay to explore their antioxidant potential.
Stability Assessment in Aqueous and Organic Solvents of Metal-Organic Framework PCN 333 Nanoparticles through a Combination of Physicochemical Characterization and Computational Simulations.
Langmuir
October 2024
Institute for Molecular Modelling and Simulation, Department of Material Sciences and Process Engineering, University of Natural Resources and Life Sciences, Vienna, Vienna1190, Austria.
Article Synopsis
- Mesoporous metal-organic frameworks (MOFs) are promising for drug delivery, but their stability in water limits their use, with some exceptions like the PCN-series, which have shown durability in various pH levels.
- This study investigates the stability of PCN-333 nanoparticles (nPCN) in different solvents and reveals that nPCN actually deteriorates in water, losing its octahedral shape and porosity within just 2 hours.
- Through molecular dynamics simulations, the research uncovers that the breakdown of PCN-333 in water is caused by hydrolysis, where water molecules disrupt the metal-ligand bonds that hold the structure together.
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