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Multi-ion intercalated Ti_(3)C_(2)T_(x)MXene and the mutual modulation within interlayer

Particuology 2023年第1期72卷 10-16页

作者： Zhihe Wang Yixuan Wang Qinhua Gu Cuimei Zhao Junkai Zhang Shichong Xu Ming Lu Bingsen Zhang Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education the Joint Laboratory of MXene MaterialsKey Laboratory of Preparation and Application of Environmental Friendly Materials of the Ministry of EducationJilin Normal UniversityChangchun 130103China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

Intercalation of ions between the adjacent MXene layers can change the interlayer environment and influence the electrochemical ion storage *** order to understand the effect of multi-ions confined by the MXene layers on the performance of electrochemical energy storage,Co^(2+),Mn^(2+)and Ni^(2+)intercalated into Ti_(3)C_(2)T_(x)MXene which already pre-intercalated Al3+are obtained by spontaneous static *** on the monitor of(002)crystal orientation,intercalated multi-ions can regulate and control the interlayer environment of MXenes via stress,which induces lattice shrinkage occurring in the c *** by ion storage mechanism-performance,the multi-ion occupies the interspace of MXene and affects the electrochemical *** work would offer guidance to understand the relationship among the multi-ion and MXene by two-dimensional(2D)layered materials.

关键词： MXene lon pre-intercalation Interlayer transition metal ion

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Measurements of HO2 uptake coefficient on aqueous（NH4）2SO4 aerosol using aerosol flow tube with LIF system

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Chinese Chemical Letters 2019年第12期30卷 2236-2240页

作者： Qi Zou Huan Song Mingjin Tang Keding Lu College of Environmental Sciences and Engineering Peking UniversityBeijing 100871China State Key Laboratory of Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China

Laboratory studies of HO2 uptake coefficients,γ(HO2),were conducted at room temperature using an aerosol flow tube coupled with a laser induced fluorescence(LIF) *** measurement was conducted with atmospherically relevant HO2 concentrations(~1×10^9 molecule/cm^3) at 51% *** measured γ(HO2) onto aqueous(NH4)2 SO4 aerosol was 0.001±0.0007,which was consistent with the relatively low first-order loss rate of HO2 onto aqueous(NH4)2 SO4 ***γ(HO2) was elevated with increase of Cu(Ⅱ) concentrations in aqueous(NH4)2 SO4 *** threshold of Cu(Ⅱ) concentration was10^-3 mol/L for the dramatic increase of γ(HO2).It was found that γ(HO2) reached 0.1 when Cu(Ⅱ)concentration in aerosol was larger than 10^-3 mol/L,suggesting that γ(HO2) is very sensitive to concentration of transition metal ions in aerosol.

关键词： Heterogeneous reaction HO2 uptake coefficient Aerosol flow tube Laser induced fluorescence transition metal ion

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Synthesis of Novel Chiral Dibenzo [ a, c ] cycloheptadiene Bis(oxazoline) and Catalytic Asymmetric Reactions

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有机化学 2003年第Z1期23卷 27-27页

作者： FU Bin DU Da-Ming WANG Jian-Bo Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education College of Chemistry and Molecular Engineering Peking University Beijing 100871

Over the last decade, C2-symmetric chiral oxazoline metal complexes have been recognized as an effective classof chiral catalyst in a variety of transition metal catalyzed asymmetric reactions. [1] High catalytic activities and enantiomeric excesses have been obtained using C2-symmetric chiral ligands in conjunction with suitable transition metal ion, for example, the hydrosilylation of ketone, allylic alkylation, Michael addition, Diels-Alder cycloaddition, and cyclopropanation. Thus, the design and synthesis of new chiral oxazoline ligands have inspired many scientists to work with great efforts.……

关键词： transition metal ion chiral oxazoline design and synthesis catalytic activities metal complexes chiral catalyst chiral ligands

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