Results 181 to 189 of about 669 (189)

Excited‐State Proton Transfer in Push‐Pull N‐Methyl Pyridium Reversible Super‐Photoacids Ruled by Intramolecular Hydrogen‐Bond‐Like Interactions

open access: yesChemistry – A European Journal, EarlyView.
Push‐pull A+‐π‐D N‐methyl pyridinium derivatives were found to act as efficient reversible superphotoacids. Upon excitation, they undergo a fast ESPT but recombine with the released proton when the excitation is turned off. In the ortho isomers, intramolecular hydrogen‐bond‐like interactions between the hydroxyl group and the ethenic hydrogen are ...
Alessio Cesaretti   +8 more
wiley   +1 more source

Rank‐based estimation of propensity score weights via subclassification

open access: yesCanadian Journal of Statistics, EarlyView.
Abstract Propensity score (PS) weighting estimators are widely used for causal effect estimation and enjoy desirable theoretical properties, such as consistency and potential efficiency under correct model specification. However, their performance can degrade in practice due to sensitivity to PS model misspecification.
Linbo Wang   +3 more
wiley   +1 more source

Unveiling the Electrochemical Reversibility of Multielectron Redox in s‐Tetrazine Derivatives for Large‐Capacity Electrode Materials

open access: yesChemSusChem, EarlyView.
Peripheral 2‐pyridine rings delocalize charges by withdrawing electrons and, through Li‐ion coordination in the reduced state, lock the geometry of the s‐tetrazine core. This stabilization markedly enhances redox kinetics and Li‐ion diffusion, enabling electrochemically reversible two‐electron transfer of s‐tetrazine derivatives.
Seunghwan Min   +3 more
wiley   +1 more source

A New Low‐Rate Stable Hydrogel Cathode for Aqueous Zn‐ion Batteries

open access: yesChemSusChem, EarlyView.
A mixed ion‐ and electron‐conducting hydrogel enables low‐rate stability of aqueous Zn‐ion batteries. Aqueous Zn‐ion batteries (ZIBs) are attractive candidates for large‐scale energy storage owing to the abundance, low cost, and intrinsic safety of Zn metal.
Roya Rajabi   +4 more
wiley   +1 more source

Applying Machine Learning Methods to Laser Acceleration of Protons: Synthetic Data for Exploring the High Repetition Rate Regime

open access: yesContributions to Plasma Physics, EarlyView.
ABSTRACT Advances in ultra‐intense laser technology have increased repetition rates and average power for chirped‐pulse laser systems, which offer a promising solution for many applications including energetic proton sources. An important challenge is the need to optimize and control the proton source by varying some of the many degrees of freedom ...
John J. Felice   +7 more
wiley   +1 more source

From Lab to Market: Strategies for Stabilizing and Scaling Perovskite Solar Cells via Printing Technologies

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Over the past 13 years, the power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) have experienced important enhancements. PSCs exhibit superior optoelectronic properties and can be fabricated using inexpensive materials. To compete with first‐generation photovoltaic technologies, it is essential to scale up production.
Xin Li   +6 more
wiley   +1 more source

Multi‐Objective Optimization of Phase Change Coupled Thermal Management System Based on NSWOA

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
NSWOA‐optimized liquid‐PCM hybrid cooling reduces 18 650 pack Tmax by 5.9 K and ΔT to 4.7 K at 4 °C discharge, validated within 1.5 K error; non‐uniform cell placement and key PCM properties are balanced for safety. This study investigates phase change materials (PCMs) for lithium battery thermal management.
Yang Yang   +4 more
wiley   +1 more source

Hygroscopic Organic Complex Mutated Helmholtz Plane of Zn Anode for Outstanding Zinc Ion Battery

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Simple and commercial approach was established to in‐situ construct a hygroscopic Zn complex protective layer. This protective layer can absorb water molecules and trap it away from Zn anode. The hygroscopic layer can dehydrate the electrolyte and enhance the de‐solvation process and partial form nitrogen rich SEI which lead to reduce the mechanical ...
Abdelnaby M. Elshahawy   +5 more
wiley   +1 more source

Redox‐Mediating Mo2C Nanoparticles Confined Within Nitrogen‐ and Phosphorus‐Codoped Amorphous Carbon Matrix for Lithium–Sulfur Batteries

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A multifunctional interlayer composed of Mo2C nanoparticles embedded in a nitrogen‐ and phosphorus‐doped amorphous carbon matrix on graphene is developed via electrostatic self‐assembly and thermal transformation. The resulting architecture suppresses the shuttle effect, improves electrical conductivity, and facilitates redox conversion kinetics ...
Won Il Kim   +7 more
wiley   +1 more source

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