SEMIQUINONE

作品数：8被引量：10H指数：2
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Quantification of the redox properties of microplastics and their effect on arsenite oxidation被引量：1
《Fundamental Research》2023年第5期777-785,共9页Lin Chen Dengjun Wang Tianran Sun Tingting Fan Song Wu Guodong Fang Min Yang Dongmei Zhou 
the National Natural Science Foundation of China(4197310);the Alabama Agricultural Experiment Station,and the Hatch Program of the National Institute of Food and Agriculture,U.S.Department of Agriculture(ALA016-1-19123).
Microplastics have attracted global concern.The environmental-weathering processes control their fate,transport,transformation,and toxicity to wildlife and human health,but their impacts on biogeochemical redox proces...
关键词：Microplastics WEATHERING Redox property Semiquinone radicals Electron-donating and-accepting capacity Arsenite oxidation 
Radical Stabilization in Dissolved Humates
《Open Journal of Physical Chemistry》2011年第3期55-60,共6页Barbora Bakajová Ray von Wandruszka 
Quinoid entities, in which quinone and hydroquinone groups equilibrate via a semiquinone radical intermediate, are a common structural feature in humic materials. The electron paramagnetic resonance (EPR) signals of t...
关键词：HUMIC Acid SEMIQUINONE EPR Enhancement BRIDGING Interactions Aggregation RADICAL STABILIZATION 
Photogeneration of the free radicals and singlet oxygen by chrysophanol from rheum被引量：3
《Science China Chemistry》2004年第5期381-387,共7页RAO Jing1,2, XIE Jie1, ZHAO Jingquan1 & ZHU Teng2 1. Key Laboratory of Photochemistry, Center for Molecular Science, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100080, China 2. University of Science and Technology Beijing, Beijing 10083, China 
This work was supported by the National Natural Science Foundation of China(Grant No.20273079).
In the current work, chryosphanol (MHAQ) was isolated and purified from rheum, and the photosensitization activities were studied. In nitrogen-saturated DMSO solution, irradia- tion of chryosphanol (MHAQ) with visible...
关键词：chrysophanol  ESR  SEMIQUINONE RADICAL anions  superoxide RADICAL anions  hydroxyl radical  singlet oxygen. 
Photochemistry of hypocrellin derivatives under anaerobic conditions被引量：2
《Chinese Science Bulletin》2000年第7期597-603,共7页Yuying He An Jingyi Lijin Jiang 
To improve the red absorption and solubility of hypocrellin, we have synthesized a series of hypocrellin B derivatives. The pnotochemistry of these new compounds in anaerobic media has been investigated by using elect...
关键词：HYPOCRELLIN B DERIVATIVES SEMIQUINONE anion radical HYDROQUINONE electron PARAMAGNETIC resonance (EPR) spectrophotometry. 
Interaction between hypocrellin and aliphatic amines被引量：1
《Science China Chemistry》1996年第6期568-576,共9页张曼华 陈申 夏万林 蒋丽金 陈德文 
Project supported by the National Natural Science Foundation of China
The interaction of hypocrellin, including hypocrellin A (HA) and hypocrellin B (HB), with aliphatic amines in deaerated solutions has been studied by ESR and nanosecond transient absorption spectra. In polar solvents,...
关键词：HYPOCRELLIN (HA and HB) SEMIQUINONE radical ANION ALIPHATIC AMINES ESR nanosecond TIME-RESOLVED transient absorption. 
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