Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1038/scientificamerican0516-21 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Suppressing Jahn-Teller distortion of MnO via B-Ni dual single-atoms integration for methane catalytic combustion.
Nat Commun
January 2025
School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, Tianjin, 300072, China.
Precisely managing electron transfer pathways throughout the catalytic reaction is paramount for bolstering both the efficacy and endurance of catalysts, offering a pivotal solution to addressing concerns surrounding host structure destabilization and cycling life degradation. This paper describes the integration of B-Ni dual single-atoms within MnO channels to serve as an electronic reservoir to direct the electron transfer route during methane catalytic combustion. Comprehensive analysis discovers that B atoms weaken the interaction between O and Mn atoms by forming bonds with lattice oxygen atoms.
View Article and Find Full Text PDFSpray-Printed Light-Emitting Diodes with Perovskite/Polymer Composite Emitters on Various Transparent Substrates.
ACS Appl Mater Interfaces
January 2025
Department of Chemical and Biological Engineering, Sookmyung Women's University, Seoul 04310, Korea.
Advancements in printing techniques are essential for fabricating next-generation displays. Lead halide perovskites demonstrate great potential as light emitters of solution-processed light-emitting diodes (LEDs). In particular, the perovskite/polymer composite emitters exhibit exceptional luminescent characteristics, mechanical flexibility, and environmental stability due to the improved film morphologies and defect passivation achieved through the introduction of polymer additives.
View Article and Find Full Text PDFDensely populated macrocyclic dicobalt sites in ladder polymers for low-overpotential oxygen reduction catalysis.
Nat Commun
January 2025
College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, 610065 Chengdu, China.
Dual-atom catalysts featuring synergetic dinuclear active sites, have the potential of breaking the linear scaling relationship of the well-established single-atom catalysts for oxygen reduction reaction; however, the design of dual-atom catalysts with rationalized local microenvironment for high activity and selectivity remains a great challenge. Here we design a bisalphen ladder polymer with well-defined densely populated binuclear cobalt sites on Ketjenblack substrates. The strong electron coupling effect between the fully-conjugated ladder structure and carbon substrates enhances the electron transfer between the cobalt center and oxygen intermediates, inducing the low-to-high spin transition for the 3d electron of Co(II).
View Article and Find Full Text PDFComputational Investigation of the Role of Metal Center Identity in Cytochrome P450 Enzyme Model Reactivity.
Biochemistry
January 2025
Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Mononuclear Fe enzymes such as heme-containing cytochrome P450 enzymes catalyze a variety of C-H activation reactions under ambient conditions, and they represent an attractive platform for engineering reactivity through changes to the native enzyme. Using density functional theory, we study both native Fe and non-native group 8 (Ru, Os) and group 9 (Ir) metal centers in an active site model of P450. We quantify how changing the metal changes spin state preferences throughout the catalytic cycle.
View Article and Find Full Text PDFSynephrine Inhibits Oxidative Stress and HO-Induced Premature Senescence.
Cell Biochem Biophys
January 2025
Department of Maxillofacial Radiology, Field of Oncology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, 890-8544, Japan.
Synephrine, a protoalkaloid found in Citrus aurantium (CA) peels, exerts lipolytic, anti-inflammatory, and vasoconstrictive effects; however, its antioxidant activity remains unclear. In this study, electron spin resonance spectroscopy revealed that synephrine scavenged both hydroxyl and superoxide anion radicals. Several external stimuli, such as HO, X-rays, and ultraviolet (UV) radiation, cause stress-induced premature senescence (SIPS).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!