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We consider the asymmetric simple exclusion process (ASEP) on a semi-infinite chain which is coupled at the end to a reservoir with a particle density that changes periodically in time. It is shown that the density profile assumes a time-periodic sawtoothlike shape. This shape does not depend on initial conditions and is found analytically in the hydrodynamic limit. In a finite system, the stationary state is shown to be governed by effective boundary densities and the extremal flux principle. Effective boundary densities are determined numerically via Monte Carlo simulations and compared with those given by mean-field approach and numerical integration of the hydrodynamic limit equation which is the Burgers equation. Our results extend straightforwardly beyond the ASEP to a wide class of driven diffusive systems with one conserved particle species.
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http://dx.doi.org/10.1103/PhysRevE.78.011122 | DOI Listing |
Chemistry
September 2025
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
Sequence-controlled polyester-based alternating copolymers have attracted significant interest due to their biocompatibility, biodegradability, closed-loop recyclability, and hydrolytic degradability, offering broad potential in biomedical and sustainable materials. Among the available strategies, regioselective ring-opening polymerization (ROP) of asymmetric cyclic di(thio)esters and cyclic(ester-amide)s has emerged as a promising approach for constructing alternating copolymers with precise sequence- and stereo-control, structural diversity, and tunable properties. This review classifies asymmetric cyclic monomers into two categories: (1) monomers with two aliphatic ester bonds, where regioselectivity is mainly dictated by steric differences and typically requires tailored metal catalysts; and (2) monomers with chemically distinct reactive sites (e.
View Article and Find Full Text PDFElectronic textiles are a transformative technology set to revolutionize next-generation wearable devices. However, a major challenge is making efficient yarn-based energy systems that power flexible wearables while blending seamlessly into textiles for unobstructed applications. Herein, 2D materials-coated yarn supercapacitors (YSCs) are designed, offering a promising solution through capacitance-matched electrode fabrication and a novel customizable riveted interconnection strategy for textile integration.
View Article and Find Full Text PDFOrg Lett
September 2025
State Key Laboratory of Precision and Intelligent Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China.
A novel palladium-catalyzed asymmetric aminomethylative pyridonation of conjugated dienes with -acetals and 2-hydroxypyridines was established, which provided a direct and reliable method for the synthesis of a wide range of γ-aminated N-substituted 2-pyridones with good to excellent enantioselectivities. The simple BF was identified as an effective cocatalyst to improve the reaction efficiency, and DFT calculations revealed that proton transfer between the aminomethylated allylic palladium species and 2-hydroxypyridine promoted by BF is crucial for obtaining good reactivity.
View Article and Find Full Text PDFPhys Chem Chem Phys
September 2025
Department of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden.
Deep eutectic electrolytes (DEEs) have in recent years gained momentum as prospective compounds for next-generation (lithium) batteries. Yet, the connection between molecular-level properties and macroscopic performance of DEEs is poorly understood. We have here, by molecular dynamics simulations, studied in detail a few simple DEEs created using the hydrogen bond (HB) donor -methyl-acetamide (NMA) and one of three different common lithium salts: LiBF, LiDFOB, and LiBOB, all in a 1 : 4 molar ratio composition.
View Article and Find Full Text PDFChemSusChem
September 2025
Organic Chemistry Institute, University of Münster, Corrensstraße 36, 48149, Münster, Germany.
A three-step, one-pot, sequential cascade starting from simple feedstocks to increase complexity toward value-added chiral synthetic building blocks is reported. This is achieved by precisely integrating organic photocatalysis and noncovalent organocatalysis, often operating at dissimilar conditions and reaction media. In particular, this strategy is used to enable the direct transformation of readily available benzylic substrates, such as methylbenzenes, benzyl alcohols, or amines, into enantioenriched α-aminonitriles by benzylic CH photooxidation to their corresponding aldehydes, followed by in situ imine formation and final asymmetric organocatalytic Strecker reaction.
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