Article
Engineering, Environmental
Wen Zhang, Zixu Zhao, Chuanyang Shen, Haofei Zhang
Summary: In this study, the oxidation kinetics of atmospheric organic aerosols (OA) were investigated under various aging timescales and gas-phase hydroxyl radical concentrations. The results show that OA heterogeneous oxidation is 2-3 orders of magnitude faster at atmospheric hydroxyl radical levels compared to typical laboratory conditions. The enhanced oxidation of OA is attributed to an intermolecular autoxidation mechanism mediated by particle-phase peroxy radicals, leading to the formation of organic hydroperoxides, alcohols, and fragmentation products. These findings highlight the significant atmospheric impacts of OA oxidative aging and provide insight into the chemistry of heterogeneous aerosol oxidation in the atmosphere.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Environmental Sciences
Ekaterina Georgieva, Yanka Karamalakova, Radostina Miteva, Hristo Abrashev, Galina Nikolova
Summary: Illicit drug use, particularly psychomotor stimulants, has negative effects on the cardiovascular system and can lead to serious cardiovascular pathologies such as abnormal heart rhythms and heart attacks. Studies on oxidative stress levels in patients with cocaine intoxication may lead to the development of a rapid and effective method for assessing toxicity.
Article
Nanoscience & Nanotechnology
Bowen Zhao, Shuai Zeng, Songtao Li, Xindong Qin, Zhengkun Li, Shiming Zhang, Haifeng Zhang, Zhengwang Zhu
Summary: CuZr-based metallic glasses exhibit superior catalytic performance due to their unique atomic structure and the generation of active species, with high stability and degradation efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Manhong Li, Siqi Liu, Haoshi Bao, Qini Li, Yi-Hui Deng, Tian-Yu Sun, Leifeng Wang
Summary: Organoboron compounds are valuable in medicinal, biological, and industrial fields. This study achieved direct borylation of haloarenes without the use of metal catalysts by irradiating with visible light. Mechanistic experiments and computational investigations revealed the formation of an excited donor-acceptor complex with a high reduction potential, enabling single-electron-transfer reactions with aryl halides.
Article
Chemistry, Multidisciplinary
Jaworski C. C. Capricho, Tzu-Ying Liao, Boon Xian Chai, Ahmed Al-Qatatsheh, Jitraporn (Pimm) Vongsvivut, Peter Kingshott, Saulius Juodkazis, Bronwyn Louise Fox, Nishar Hameed
Summary: This study demonstrates the potential of macroradical epoxies as surface coating materials, with the use of magnets during polymerization. The magnetically oriented and stable radicals in the polymer backbone render the coatings antimicrobial.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Applied
Eduardo Fuentes-Lemus, Shuwen Jiang, Per Hagglund, Michael J. Davies
Summary: The co-existence of proteins, lipids, and riboflavin in milk, coupled with processing conditions such as high temperatures and light exposure, leads to oxidative damage. Caseins, as key milk components, are highly vulnerable to oxidative modifications by various oxidants, with the extent of damage depending on both protein concentration and the type of oxidant used. Higher protein concentrations and interactions between caseins favor radical chain reactions that enhance protein oxidative damage.
FOOD HYDROCOLLOIDS
(2021)
Article
Chemistry, Multidisciplinary
Menghui Liu, Yunzhi Wang, Yanlv Chen, Liujun Li, Yang Sun, Yongchao Li, Yajun Yuan, Pan Lu, Wenkai Zhang, Pengfei Pang, Xin Peng, Hong Shan
Summary: This study reports a liquid embolic agent derived from a poly (lipoic acid-tannic acid)/tromethamine/Galinstan solution. The solution can form a hydrogel in situ and effectively embolize renal artery and femoral vein. It has adjustable properties, good biocompatibility, and can be a potential embolic agent for treating vascular diseases.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Svyatoslav Tolstikov, Kristina Smirnova, Andrey Kolesnikov, Gleb Letyagin, Artem Bogomyakov, Galina Romanenko, Victor Ovcharenko
Summary: Cu(hfac)2 reacted with pyridyl-substituted nitronyl nitroxides to form chain-polymer complexes {[Cu (hfac)2LR]2[Cu(hfac)2]}infinity, where LR represents 2-(4-R-pyridin-3-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl, and R can be Me, MeO, Et, n-Pr, i-Pr, n-Bu, or CP (cyclopentyl). X-ray crystallography experiments demonstrated the presence of centrosymmetric dimers [Cu(hfac)2LR]2 bonded by the Cu (hfac)2 fragments in the solid state of the complexes, forming chain polymers. The Cu atoms in the dimeric fragments undergo structural rearrangement upon temperature variation, resulting in anomalous temperature dependence of the magnetic moment (mu eff).
Article
Polymer Science
Juan Jose Benvenuta-Tapia, Pascale Champagne, Jose Alfredo Tenorio-Lopez, Eduardo Vivaldo-Lima, Ramiro Guerrero-Santos
Summary: This study evaluates the use of P(S-co-GMA)-b-S copolymers synthesized by nitroxide mediated polymerization as chain extenders in the recycling of poly(lactic acid) biopolyester. The addition of such copolymers significantly increases the viscosity average molecular weight of modified polymeric materials and improves their performance to approach that of pristine PLA.
Article
Chemistry, Applied
Lei Shi, Wanhui Wang, Chunjuan Wang, Yang Zhou, Yuezhan Feng, Tiekun Jia, Fang Wang, Zhiyu Min, Ji Hu, Zhigang Xue
Summary: A cross-linked polymer layer is formed on lithium-metal anodes using a thiol-acrylate click chemistry reaction, which provides excellent humidity stability and reduces interfacial resistance, leading to an outstanding cycle performance in lithium-ion batteries.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Mengran Tang, Long Zhang, Xiaoxue Song, Long Zhao
Summary: This study proposes a novel approach to address the limitations of existing methods for modulating the optical properties of gold nanoparticles (AuNPs) by constructing a reversible electrochemical switch. By linking nitroxide radicals and AuNPs and tethering them to an indium tin oxide (ITO) electrode, the optical properties of AuNPs can be reversibly modulated by oxidizing/reducing the nitroxide units. This electrochemical switch presents a novel approach to control the optical properties of AuNPs and has the potential to enhance their versatility and practicality in various applications.
Article
Mechanics
Danru Qi, Guijing Li, Xinlei Han, Xueqian Fang, Wenjie Feng, Ruilan Tian
Summary: Oxide additives, such as CuO, can enhance the fracture toughness and mechanical properties of ceramic particle-reinforced metal matrix composites. The addition of CuO inhibits the initiation and propagation of secondary cracks, relieves stress concentration in the Ag matrix, and strengthens the interfacial bonding. Without CuO, cracks initiate at the sharp corners of SnO2 particles, propagate at a 45-degree angle, and cause matrix fracture. With CuO, the propagation rate of primary cracks decreases, and microcracks primarily occur near clustered SnO2 particles, shifting the damage initiation to the Ag metal matrix.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Nanoscience & Nanotechnology
Zhimeng Liu, Chen Fang, Xin He, Yangzhi Zhao, Hualiang Xu, Jingxin Lei, Gao Liu
Summary: A polymer binder with a unique network structure was developed to address the volume fluctuation issue of silicon anode in lithium-ion batteries, effectively improving the cycle stability and rate performance of the battery.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Yan-Li Gao, Yufei Wang, Liguo Gao, Jian Li, Yali Wang, Katsuya Inoue
Summary: Two novel cocrystal Mn-II compounds were successfully synthesized, forming three-dimensional supramolecular architectures through extensive intramolecular H-bonds and halogen bonds.
Article
Chemistry, Physical
H. A. Bandal, Hern Kim
Summary: Substituting the water oxidation reaction with the urea oxidation reaction can reduce the cost of H2 generation and provide a pathway for wastewater treatment. However, an efficient and stable catalyst is needed to overcome the kinetic limitations of the urea oxidation reaction (UOR).
APPLIED SURFACE SCIENCE
(2023)
