Processability remains a fundamental issue for the implementation of conducting polymer technology. A simple synthetic route towards processable precursors to conducting polymers (main chain and side chain) was developed using commercially available materials. These soluble precursor systems were converted to conjugated polymers electrochemically in aqueous media, offering a cheaper and greener method of processing. Oxidative conversion in aqueous and organic media each produced equivalent electrochromics. The precursor method enhances the yield of the electrochromic polymer obtained over that of electrodeposition, and it relies on a less corruptible electrolyte bath. However, electrochemical conversion of the precursor polymers often relies on organic salts and solvents. The ability to achieve oxidative conversion in brine offers a less costly and a more environmentally friendly processing step. It is also beneficial for biological applications. The electrochromics obtained herein were evaluated for electronic, spectral, and morphological properties.
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http://dx.doi.org/10.1002/pola.23972 | DOI Listing |
Int J Biol Macromol
January 2025
Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA.
The inherent heterogeneity, poor compatibility with polymers, and dark color of lignin limit its application in composites. In this study, original lignin (OL) was fractionated sequentially using four green organic solvents to obtain lignin fractions with different chemical structures. These well-defined lignin fractions were then blended with polybutylene succinate (PBS) to fabricate biocomposites.
View Article and Find Full Text PDFChempluschem
January 2025
L V Pisarzhevskii Institute of Physical Chemistry NAS of Ukraine: Institut fiziceskoj himii imeni L V Pisarzevskogo Nacional'na akademia nauk Ukraini, Department of free radicals, UKRAINE.
This study unveils a novel property of polyaniline by establishing its catalytic activity in heterogeneous hydrogenation with molecular hydrogen. Polyaniline was activated by heat-treating at different temperatures in a hydrogen atmosphere. The sample treated at 300 °C exhibited the highest catalytic activity for ethylene hydrogenation in the gas phase at atmospheric pressure and for p-nitrotoluene or α-methylstyrene hydrogenation in the liquid phase.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, School of Chemistry and Materials, Fudan University, Shanghai 200433, China.
For Zn metal batteries, the Zn anode faces several challenges, including Zn dendrites, hydrogen evolution, and corrosion. These issues are closely related to the Zn deposition process at the electrode/electrolyte interface. Herein, we propose interfacial engineering to protect the Zn anode and induce homogeneous deposition using conjugated cyclized polyacrylonitrile (cPAN) polymer nanofibers.
View Article and Find Full Text PDFEur J Med Chem
January 2025
Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China. Electronic address:
Substance use disorders (SUDs) present a critical global health challenge, as current treatment options often prove insufficient, particularly for substances like ketamine and methamphetamine. In this study, we developed a novel immunotherapeutic strategy utilizing protein-free, polymer-based vaccines, with hyperbranched polyethylenimine (Hb-PEI) as a carrier to enhance immune specificity and remove the production of non-specific antibodies. Haptens for ketamine and methamphetamine were covalently conjugated to the Hb-PEI carrier, along with the Toll-like receptor (TLR) 7/8 agonist 1V209, to stimulate targeted humoral immune responses.
View Article and Find Full Text PDFJ Am Chem Soc
January 2025
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China.
In traditional atom transfer radical polymerization (ATRP), oxygen must be meticulously eliminated due to its propensity to quench radical species and halt the polymerization process. Additionally, oxygen oxidizes the lower-valent Cu catalyst, compromising its ability to activate alkyl halides and propagate polymerization. In this study, we present an oxygen-driven ATRP utilizing alkylborane compounds, a method that not only circumvents the need for stringent oxygen removal but also exploits oxygen as an essential cofactor to promote polymerization.
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