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Multiple Protophilic Redox-Active Sites in Reticular Organic Skeletons for Superior Proton Storage.
Angew Chem Int Ed Engl
January 2025
Tongji University, School of Chemical Science and Engineering, 1239 Siping Road, 200092, Shanghai, CHINA.
Protons (H+) with the smallest size and fastest redox kinetics are regarded as competitive charge carriers in the booming Zn-organic batteries (ZOBs). Developing new H+-storage organic cathode materials with multiple ultralow-energy-barrier protophilic sites and super electron delocalization routes to propel superior ZOBs is crucial but still challenging. Here we design multiple protophilic redox-active reticular organic skeletons (ROSs) for activating better proton storage, triggered by intermolecular H-bonding and π-π stacking interactions between 2,6-diaminoanthraquinone and 2,4,6-triformylphloroglucinol nanofibrous polymer.
View Article and Find Full Text PDFElectrostatic and Electronic Effects on Doped Nickel Oxide Nanofilms for Water Oxidation.
J Am Chem Soc
January 2025
School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Tyree Energy Technologies Building, 229 Anzac Parade, Kensington, NSW 2052, Australia.
An ideal water-splitting electrocatalyst is inexpensive, abundant, highly active, stable, selective, and durable. The anodic oxygen evolution reaction (OER) is the main bottleneck for H production with a complex and not fully resolved mechanism, slow kinetics, and high overpotential. Nickel oxide-based catalysts (NiO) are highly active and cheaper than precious metal catalysts.
View Article and Find Full Text PDFRadical Anions of Porphyrin Molecular Wires: Delocalization and Dynamics.
J Am Chem Soc
January 2025
Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, U.K.
The delocalization length of charge carriers in organic semiconductors influences their mobility and is an important factor in the design of functional materials. Here, we have studied the radical anions of a series of linear and cyclic butadiyne-linked porphyrin oligomers using CW-EPR, H Mims ENDOR and NIR/MIR spectroelectrochemistry together with DFT calculations and multiscale molecular modeling. Low-temperature hyperfine EPR spectroscopy and optical data show that polarons are delocalized nonuniformly over about four porphyrins with most of the spin density on just two units even in the cyclic structures, in which all porphyrin sites are identical.
View Article and Find Full Text PDFRational design of organic diradicals with robust high-spin ground state based on antiaromatic linkers.
Chem Sci
December 2024
Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTC), Universitat de Barcelona c/ Martí i Franquès 1-11 08028 Barcelona Spain
Article Synopsis
- - This study investigates fully-organic molecules, particularly diradicals formed from diphenylmethyl cores linked with antiaromatic couplers, as promising components for lightweight, flexible magnetic materials useful in spintronics.
- - Advanced electronic structure calculations reveal these diradicals can achieve robust high-spin configurations, with singlet-triplet energy gaps significantly exceeding thermal energy at room temperature, making them stable.
- - The strong interactions between the π-systems of the open-shell centers and the couplers enhance both spin state stability and spin density delocalization, emphasizing the potential of pentalene-based diradicals in developing new organic magnetic materials.
[Use of HemoCue® or portable hemoglobinometer: results of the national surveys carried out by the SFBC POCT working group].
Ann Biol Clin (Paris)
November 2024
Biochimie et Cellule de Biologie Délocalisée, CHU de Bordeaux, Place Amélie Raba Léon, et UNR5536 CNRS-Université de Bordeaux, 33000 Bordeaux, France.
Hemoglobin (Hb) measurement is a fundamental biological test, especially in emergency situations where rapid medical decisions are required. Portable hemoglobinometers, such as HemoCue®, provide a delocalized solution for capillary whole blood. The SFBC's POCT News and Issues working group designed and conducted two national surveys to assess the use and management of these devices, both on the clinical and biological side, with 306 and 160 responses respectively.
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