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Thieno[3,4-c]pyrrole-4,6-dione based copolymers for high performance organic solar cells and organic field effect transistors

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Chinese Chemical Letters 2016年第8期27卷 1277-1282页

作者： Pan He Xiao-Lan Qiao Qun Qian hong-xiang li Department of Chemistry Shanghai University Shanghai Institute of Organic Chemistry Chinese Academy of Sciences

Donor-acceptor type copolymers have wide applications in organic field-effect transistors and organic photovoltaic ***[3,4-c]pyrrole-4,6-dione（TPD）,as an electron-withdrawing unit,has been widely used in D-A type copolymers *** now,the highest power conversion efficiency and mobility of TPD-based copolymers are over 8% and 1.0 cm^2 V^（-1） s^（-1） *** this review,the recent progress of TPD-based copolymers in organic solar cells and organic transistors is summarized.

关键词： Donor-acceptor type copolymers Organic semiconductors Thieno[3 4-c]pyrrole- 6-dione unit Organic transistors Organic solar cells

Mechanical properties and constitutive behaviors of as-cast 7050 aluminum alloy from room temperature to above the solidus temperature

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International Journal of Minerals,Metallurgy and Materials 2016年第8期23卷 949-958页

作者： Qing-ling Bai hong-xiang li Qiang Du Ji-shan Zhang lin-zhong Zhuang State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China SINTEF Materials and Chemistry TrondheimNorway

The mechanical properties and constitutive behaviors of as-cast AA7050 in both the solid and semi-solid states were determined using the on-cooling and in situ solidification approaches, respectively. The results show that the strength in the solid state tends to increase with decreasing temperature. The strain rate plays an important role in the stress–strain behaviors at higher temperatures, whereas the influence becomes less pronounced and irregular when the temperature is less than 250°C. The experimental data were fitted to the extended Ludwik equation, which is suitable to describe the mechanical behavior of the materials in the as-cast state. In the semi-solid state, both the strength and ductility of the alloy are high near the solidus temperature and decrease drastically with decreasing solid fraction. As the solid fraction is less than 0.97, the maximum strength only slightly decreases, whereas the post-peak ductility begins to increase. The experimental data were fitted to the modified creep law, which is used to describe the mechanical behavior of semi-solid materials, to determine the equivalent parameter fGBWL, i.e., the fraction of grain boundaries covered by liquid phase.

关键词： aluminum alloys mechanical properties constitutive relations fitting

Dimesitylborylphenyl substituted 1,3,4-oxadiazole:Synthesis,characterization and sensitivity to F^-

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Chinese Chemical Letters 2011年第5期22卷 599-602页

作者： xiang hong li Bo Xu, Kang Le Lv Ai Qing Zhang College of Chemistry and Materials South-Central University for Nationalities Wuhan 430074 China

A new 1,3,4-oxadiazole compound with a dimesitylboryl group was synthesized and characterized by ~1H NMR,MS,element analysis and X-ray single-crystal *** exhibits good blue emission at 425 nm and high sensitivity to f... 详细信息

关键词： 1 3.4-Oxadiazole Dimesitylboryl Fluoride anion Chemo-sensor

Weak type(1, 1) of the Riesz transform on some direct product manifolds with exponential volume growth

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Science China Mathematics 2024年第7期67卷 1599-1622页

作者： hong-Quan li Jie-xiang Zhu School of Mathematical Sciences Fudan UniversityShanghai200433China Center for Applied Mathematics Tianjin UniversityTianjin300072China

In this paper, we are concerned with the Riesz transform on the direct product manifold H^(n)× M,where H^(n) is the n-dimensional real hyperbolic space, and M is a connected complete non-compact Riemannian manifold satisfying the volume doubling property and generalized Gaussian or sub-Gaussian upper estimates for the heat kernel. We establish its weak type(1, 1) property. In addition, we obtain the weak type(1, 1) of the heat maximal operator in the same setting. Our arguments also work for a large class of direct product manifolds with exponential volume growth. Particularly, we provide a simpler proof of weak type(1, 1) boundedness of some operators considered in the work of li et al.(2016).

关键词： Riesz transform heat kernel direct product real hyperbolic space

To improve alignment of isoindigo-based conjugated polymer film by controlling contact line receding velocity

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Chinese Chemical Letters 2017年第8期28卷 1663-1669页

作者： Shuai-Jie Chi liang Chen hong-xiang li Jian-Gang liu Xin-hong Yu Yan-Chun Han State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of the Chinese Academy of Sciences Beijing 100049China

The macroscopic alignment of conjugated polymers with low grain boundary is essential to carrier transport. During film forming process, the match between contact line receding velocity and the critical alignment velocity is essential to get the alignment polymer film. In this paper, the contact line receding velocity of a D-A conjugated polymer film, isoindigo and bithiophene（IIDDT-C3）, was adjusted by solvent vapor content and film-formation temperature. Only when solvent vapor content was 0.3 m L and the film-formation temperature was 90C, the contact line receding velocity was in accordance with the critical alignment velocity, and the highest degree of alignment was attained in the IIDDT-C3 film, with the dichroic ratio up to 4.08. Fibers were aligned parallel with the direction of the contact line receding and the molecules of IIDDT-C3 adopted an edge-on orientation with the backbone parallel with the direction of fiber long axis. The p-p stacking distance between adjacent molecules was 3.63 ？.

关键词： IID-based conjugated polymers Alignment Contact line receding velocity Critical alignment velocity

Regulation of Cleavage Activity of Ser-His Dipeptide on DNA by Phosphorylation

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Chinese Chemical Letters 1997年第7期8卷 611-612页

作者： xiang hong li Yu Fen ZHAO(Department of Chemistry, Tsinghun University Beijing 100084) TSING HUA UNIV DEPT CHEMBEIJING 100084PEOPLES R CHINA

The cleavage reactions of Ser-His and its N-terminal phosphorylated form - N-(O,O-diisopropyl) phosphoryl seryl-histidine (DIPP-Ser-His) were studied on DNA. It was found that the phosphorylation of Ser-His caused the lost of the cleavage activity on DNA. The result might give some clue on the regulation of the activity of protein by phosphorylation.

关键词： Activity Regulation of Cleavage Activity of Ser-His Dipeptide on DNA by Phosphorylation DNA

Effects of Zn content on the microstructure and the mechanical and corrosion properties of as-cast low-alloyed Mg–Zn–Ca alloys

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International Journal of Minerals,Metallurgy and Materials 2018年第7期25卷 800-809页

作者： hong-xiang li Shi-kai Qin Hng-zhong Ma Jian WanE Yun-jin liu Ji-shan Zhang State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

The effects of Zn content on the microstxucture and the mechanical and corrosion properties of as-cast low-alloyed Mg-xZn~.2Ca alloys （x = 0.6wt%, 2.0wt%, 2.5wt%, hereafter denoted as 0.6Zn, 2.0Zn, and 2.5Zn alloys, respectively） axe investigated. The results show that the Zn content not only influences grain refinement but also induces different phase precipitation behaviors. The as-cast microstxucture of the 0.6Zn alloy is composed of ct-Mg, Mg2Ca, and Ca2Mg6Zn3 phases, whereas 2.0Zn and 2.5Zn alloys only contain ct-Mg and Ca2Mg6Zn3 phases, as revealed by X-ray diffraction （XRD） and txonsmission electron microscopy （TEM） analyses. Moreover, with in- creasing Zn content, both the ultimate tensile strength （UTS） and the elongation to fracture first increase and then decrease. Among the three investigated alloys, the largest UTS （178 MPa） and the highest elongation to fracture （6.5%） are obtained for the 2.0Zn alloy. In addition, the corrosion rate increases with increasing Zn content. This paper provides on updated investigation of the alloy composi- tion-microstxucture-property relationships of different Zn-containing Mg-Zn-Ca alloys.

关键词： Mg-Zn-Ca alloy s as-cast micro stxucture mechanical properties corrosion properties

Time-resolved Luminescence-based Chemosensor for Fluoride Anion

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Chinese Chemical Letters 2006年第1期17卷 69-72页

作者： Mei SHI xiang hong li Fu You li Deng Qing ZHANG Bing Bing DAI Tao YI Chun Hui HUANG Laboratory of Advanced Materials Fudan University Shanghai 200433

A new europium complex is descried as a time-resolved luminescence-based sensor for fluoride anion. The sensor is selective even in the presence of intensive background fluorescence.

关键词： Fluorescent chemosensor time-resolved luminescence fluoride anion.

Immunomodulation of Proton-activated G Protein-coupled Receptors in Inflammation

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Current Medical Science 2024年第3期44卷 475-484页

作者： Min-shan li xiang-hong WANG Heng WANG Department of Otolaryngology-Head and Neck Surgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Institute of Allergy and Clinical Immunology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Hubei Clinical Research Center for Nasal Inflammatory Diseases Wuhan430030China

Proton-activated G protein-coupled receptors(GPCRs),initially discovered by Ludwig in 2003,are widely distributed in various *** receptors have been found to modulate the immune system in several inflammatory diseases,including inflammatory bowel disease,atopic dermatitis,and ***-activated GPCRs belong to the G protein-coupled receptor family and can detect alternations in extracellular *** detection triggers downstream signaling pathways within the cells,ultimately influencing the function of immune *** this review,we specifically focused on investigating the immune response of proton-activated GPCRs under inflammatory conditions.

关键词： proton-activated G protein-coupled receptors inflammation immunomodulation disease