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Colorimetric Detection of Naphthalene Enabled by Intra- to Intermolecular Charge Transfer Interplay Induced by π-hole···π Interactions of a TPA-Attached Pyrazinacene.
Chemistry
January 2025
Shibaura Institute of Technology: Shibaura Kogyo Daigaku, Applied Chemistry, Fukasaku 307, Minuma-ku, 337-8570, Saitama, JAPAN.
A new Donor-Acceptor type pyrazinacene derivative (1) featuring strong ICT was synthesized by linking electron-donating triphenylamine (TPA) and electron-accepting CN groups via a pyrazinacene core. The compound exhibits a dramatic color change from greenish blue to red-violet upon selective recognition of naphthalene (3) to form a 1:1 co-crystal (1•3). This color change is induced by intermolecular CT between pyrazinacene and naphthalene's aromatic moieties, driven by π-hole···π interactions.
View Article and Find Full Text PDFStructural Analysis of Inhibitor Binding to Enterovirus-D68 3C Protease.
Viruses
January 2025
Department of Biochemistry and Molecular Biotechnology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA.
Enterovirus-D68 (EV68) continues to present as a global health issue causing respiratory illness and outbreaks associated with long-lasting neurological disease, with no antivirals or specific treatment options. The development of antiviral therapeutics, such as small-molecule inhibitors that target conserved proteins like the enteroviral 3C protease, remains to be achieved. While various 3C inhibitors have been investigated, their design does not consider the potential emergence of drug resistance mutations.
View Article and Find Full Text PDFEnhancing the Solubility of Co-Formulated Hydrophobic Drugs by Incorporating Functionalized Nano-Structured Poly Lactic--glycolic Acid (PLGA) During Co-Precipitation.
Pharmaceutics
January 2025
Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ 07102, USA.
: The co-formulation of active pharmaceutical ingredients (APIs) is a growing strategy in biopharmaceutical development, particularly when it comes to improving solubility and bioavailability. This study explores a co-precipitation method to prepare co-formulated crystals of griseofulvin (GF) and dexamethasone (DXM), utilizing nanostructured, functionalized polylactic glycolic acid (PLGA) as a solubility enhancer. : An antisolvent precipitation technique was employed to incorporate PLGA at a 3% concentration into the co-formulated GF and DXM, referred to as DXM-GF-PLGA.
View Article and Find Full Text PDFEffects of Additional Flexible and Rigid Structure on BDT-BDD Terpolymer and the Performance of Organic Solar Cells.
Polymers (Basel)
January 2025
School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China.
In organic solar cells, the aggregation and crystallization of polymers are significant for bulk heterojunction. Blending with acceptor materials, polymer donor materials can adjust their aggregation by the movement of the chain segments. In this paper, the unfused structures based on thiophene and carbazole are respectively designed and introduced into the donor-acceptor copolymer donor materials to investigate the influence of flexible and rigid structures on polymer-aggregation leading photoelectric performance.
View Article and Find Full Text PDFAdsorption and Bulk Assembly of Quaternized Hydroxyethylcellulose-Anionic Surfactant Complexes on Negatively Charged Substrates.
Polymers (Basel)
January 2025
Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria, Plaza de la Ciencias s/n, 28040 Madrid, Spain.
This study examines the adsorption and bulk assembly behaviour of quaternized hydroxyethylcellulose ethoxylate (QHECE)-sodium dodecyl sulphate (SDS) complexes on negatively charged substrates. Due to its quaternized structure, QHECE, which is used in several industries, including cosmetics, exhibits enhanced electrostatic interactions. The phase behaviour and adsorption mechanisms of QHECE-SDS complexes are investigated using model substrates that mimic the wettability and surface charge of damaged hair fibres.
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