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Following a late-stage functionalization strategy, a series of heteroditopic cryptand receptors were prepared in three steps only from 1,4-dioxane. As evidenced by H NMR spectroscopic and solid state analyses, these polyamide-crown ether conjugates present general ion pair binding capacity towards salts of monovalent cations and linear triatomic anions.
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http://dx.doi.org/10.1002/chem.201704895 | DOI Listing |
Langmuir
September 2025
School of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China.
The study of the self-assembly of surfactants in aqueous solutions, though a traditional field, remains fascinating and full of novelty. In this article, the anionic perfluorodecanoic acid surfactant (PFA) is separately complexed with three hydroxyalkylamines (monoethanolamine (MEA), diethylamine (DEA), and triethanolamine (TEA)) in aqueous solutions. The transformation of aggregate morphologies from spherical unilamellar to nanotubes and then to spherical bilamellar is observed at room temperature, which is confirmed by cryo-transmission electron microscopy (cryo-TEM).
View Article and Find Full Text PDFNanoscale
September 2025
Polymer Electrolytes and Materials Group (PEMG), Department of Physics, Indian Institute of Technology Jodhpur, Karwar, Rajasthan 342030, India.
Understanding ion transport mechanisms in sodium ion-based polymer electrolytes is critical, considering the emergence of sodium ion electrolyte technologies as sustainable alternatives to lithium-based systems. In this paper, we employ all-atom molecular dynamics simulations to investigate the salt concentration () effects on ionic conductivity () mechanisms in sodium hexafluorophosphate (NaPF) in polyethylene oxide (PEO) electrolytes. Sodium ions exhibit ion solvation shell characteristics comparable to those of lithium-based polymer electrolytes, with similar anion coordination but more populated oxygen coordination in the polymer matrix.
View Article and Find Full Text PDFJ Phys Chem A
September 2025
Department of Chemistry, Institute for Quantum Information Research and Engineering, and Center for Molecular Quantum Transduction, Northwestern University, Evanston, Illinois 60208-3113, United States.
Light-driven formation of radical ion pairs that occurs much faster than their electron spin dynamics results in correlated spins whose coherence properties can be used as a quantum-based electric field sensor. This results from the radical ion pair having charge and spin distributions that track one another. Thus, electric field induced changes in the distance between the two charges are reflected in the spin-spin distance that can be measured directly using out-of-phase electron spin echo envelope modulation (OOP-ESEEM), a pulse-EPR technique.
View Article and Find Full Text PDFChempluschem
September 2025
Faculty of Chemistry, University of Warsaw, Pasteura 1, Warsaw, PL 02-093, Poland.
The design, synthesis, and characterization of a series of supramolecular receptors based on electron-deficient aromatic systems capable of engaging in anion-π interactions are reported. Receptors 1 and 3 combine an electron-poor aromatic scaffold with a cation-binding crown ether unit. Binding studies monitored by H NMR titrations in acetonitrile revealed that these receptors exhibit enhanced affinity for bromide anions in the presence of sodium cations, indicating cooperative ion-pair recognition.
View Article and Find Full Text PDFMol Ther Nucleic Acids
September 2025
Sanofi, 1541 Avenue Marcel Mérieux, 69280 Marcy l'Etoile, France.
Messenger ribonucleic acid (mRNA), a promising tool in vaccine and therapeutic development, is reliant on intact mRNA delivery into target cells. Given its susceptibility to degradation, ensuring its stability is crucial, necessitating rigorous quality control throughout the product life cycle. This study presents an ion-pair reverse-phase liquid chromatography method that enables rapid and direct mRNA extraction from lipid nanoparticles, facilitated by using a surfactant in the sample preparation.
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