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Molecular Mechanism for the Unprecedented Metal-Independent Hydroxyl Radical Production from Thioureas and HO.
Environ Sci Technol
January 2025
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P. R. China.
The most well-known hydroxyl radical (OH)-generating system is the classic iron-mediated Fenton reaction. Thiourea has been considered as an efficient OH scavenger and is frequently used to study the role of OH in various biochemical and medical research studies. Here we found that the highly reactive OH can be produced from thiourea and HO through a metal-independent pathway, as measured by electron spin resonance (ESR) secondary radical spin-trapping and fluorescent methods.
View Article and Find Full Text PDFMuon spectroscopy of a 12-phosphatetraphene with extremely efficient radical trapping properties.
Sci Rep
January 2025
Centre for Molecular and Materials Science, TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, V6T 2A3, Canada.
This paper describes muon spin spectroscopy studies of 12-phosphatetraphene stabilized by a peri-trifluoromethyl group and a meso-aryl substituent. Even though the prepared solution in tetrahydrofuran (THF) was quite dilute (0.060 M) for transverse-field muon spin rotation (TF-µSR) measurements, the π-extended heavier congener of tetraphene presented a pair of signals due to a muoniated radical from which the muon hyperfine coupling constant (hfc) was determined.
View Article and Find Full Text PDFMagnetochiral charge pumping due to charge trapping and skin effect in chirality-induced spin selectivity.
Nat Commun
January 2025
Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel.
Chirality-induced spin selectivity (CISS) generates giant spin polarization in transport through chiral molecules, paving the way for novel spintronic devices and enantiomer separation. Unlike conventional transport, CISS magnetoresistance (MR) violates Onsager's reciprocal relation, exhibiting significant resistance changes when reversing electrode magnetization at zero bias. However, its underlying mechanism remains unresolved.
View Article and Find Full Text PDFDefect-assisted surface modification of a g-CN@WC heterostructure for tetracycline degradation: DFT calculations, degradation pathways, and nematode-based ecological assessment.
Nanoscale
January 2025
School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea.
Eliminating hazardous antibiotics from aquatic environments has become a major concern in recent years. Tetracycline (TC) compounds pose a challenge for the selective degradation of harmful chemical groups. In this study, we successfully designed carbon vacancies in a gCN@WC (GW) heterostructure for the effective removal of TC pollutants under visible light.
View Article and Find Full Text PDFEfficient photo-assisted activation of peroxydisulfate by a novel Z-scheme sulfur-doped CN/DyFeO heterojunction for norfloxacin degradation: Activation mechanism and DFT studies on reaction pathways.
Environ Res
December 2024
Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea. Electronic address:
Peroxydisulfate (PDS) activation is a crucial process for wastewater treatment in complicated water matrices. However, it is frequently limited because of poor selectivity, sluggish kinetics, and short lifetime of radicals. Therefore, in this study, an efficient sulfur-doped CN/DyFeO (SCN/DyF) Z-scheme heterostructure catalyst was rationally developed using a simple wet-chemical strategy to photoactivate PDS, which can effectively degrade norfloxacin (NOR; 96.
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