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Conjugation expansion strategy enables highly stable all-polymer solar cells

Chinese Chemical Letters 2023年第8期34卷 439-443页

作者： Dingding Qiu Yanan Shi yi Li Jianqi zhang Kun Lu Zhixiang Wei CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry Molecular Dynamic Chemistry CenterTianjin Key Laboratory of Molecular Optoelectronic SciencesSchool of ScienceTianjin UniversityTianjin 300354China Sino-Danish Center for Education and Research Sino-Danish CollegeUniversity of Chinese Academy of SciencesBeijing 100049China

The stability issue is one of the key factors hindering the commercial application of organic solar ***-polymer organic solar cell is one of the effective ways to solve the stability *** this work,we designed and synthesized two polymer donor materials PBDT and PDTBDT with different conjugation ranges,and demonstrated for the first time that extending the conjugation range of donor materials in all polymer solar cells can significantly improve device efficiency and *** experimental results of materials and devices show that PDTBDT with a larger conjugation range has stronger crystallinity and a more planar structure,which endows the active layer in its corresponding device with higher exciton dissociation probability,lower carrier recombination probability,more balanced charge transport properties and more favorable film *** a result,the PDTBDT:PYF-T-o devices display an outstanding PCE of 13.38%,which is much higher than PBDT with smaller conjugation range based ***,the PDTBDT:PYF-T-o device retains 0.86 of the initial PCE after over 500 h in the air atmosphere,exhibiting significantly improved *** improved stability is attributed to the enhanced moisture and air tolerance of active layer film thanks to the strong crystallinity of the donor *** results demonstrate that the conjugation expansion strategy is one of the effective ways to obtain efficient and stable all-polymer organic solar cells.

关键词： Polymer donor Conjugation expansion All-polymer organic solar cells Stability Crystallinity

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Peripheral origin exosomal micro RNAs aggravate glymphatic system dysfunction in diabetic cognitive impairment

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Acta Pharmaceutica Sinica B 2023年第7期13卷 2817-2825页

作者： Lin zhang Dongna Li Pengrong yi Jiangwei Shi Mengqing Guo Qingsheng yin Dingbin Liu Pengwei Zhuang Yanjun zhang State Key Laboratory of Component-based Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjin 301617China Haihe Laboratory of Modern Chinese Medicine Tianjin 301617China First Teaching Hospital of Tianjin University of Traditional Chinese Medicine Tianjin 300193China National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion Tianjin 300193China State Key Laboratory of Medicinal Chemical Biology Research Center for Analytical Sciencesand Tianjin Key Laboratory of Molecular Recognition and BiosensingCollege of ChemistryNankai UniversityTianjin 300071China

Cognitive dysfunction is one of the common central nervous systems(CNS)complications of diabetes mellitus,which seriously affects the quality of life of patients and results in a huge economic *** glymphatic system dysfunction mediated by aquaporin-4(AQP4)loss or redistribution in perivascular astrocyte endfeet plays a crucial role in diabetes-induced cognitive impairment(DCI).However,the mechanism of AQP4 loss or redistribution in the diabetic states remains *** evidence suggests that peripheral insulin resistance target tissues and CNS communication affect brain homeostasis and that exosomal miRNAs are key *** and lipid metabolism disorder is an important pathological feature of diabetes mellitus,and skeletal muscle,liver and adipose tissue are the key target insulin resistance *** this review,the changes in exosomal miRNAs induced by peripheral metabolism disorders in diabetes mellitus were systematically *** focused on exosomal miRNAs that could induce low AQP4 expression and redistribution in perivascular astrocyte endfeet,which could provide an interorgan communication pathway to illustrate the pathogenesis of ***,the mechanisms of exosome secretion from peripheral insulin resistance target tissue and absorption to the CNS were summarized,which will be beneficial for proposing novel and feasible strategies to optimize DCI prevention and/or treatment in diabetic patients.

关键词： Diabetic cognitive impairment AQP4 Peripheral-central communication Exosomal miRNAs Central nervous system Glymphatic system Diabetes mellitus Astrocyte

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Screening the anti-gout traditional herbs from TCM using an in vitro method

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Chinese Chemical Letters 2016年第11期27卷 1701-1707页

作者： Wei-Jia Chen yi Wu xin Zhao Shu Liu Feng-Rui Song Zhong-ying Liu Zhi-Qiang Liu School of Pharmaceutical Sciences Jilin University National Center of Mass Spectrometry in Changchun & Jilin Province Key Laboratory of Chinese Medicine Chemistry and Mass Spectrometry Changchun Institute of Applied ChemistryChinese Academy of Sciences

The aim of this work was to evaluate the ability of 33 herbal extracts in inhibiting the acute inflammation and xanthine oxidase （XOD） activity. The anti-inflammation effects of the herbal extracts were detected by an in vitro cell model, which was established by stimulating human umbilical vein endothelial cells （HUVEC） using sodium urate （MSU）. In this model, the intercellular adhesion molecule-1 （ICAM-1） and interleukin-1 beta （IL-1β） were expressed, and the anti-inflammation effects of herbal extracts were evaluated by detecting the content changes of ICAM-1 and IL-1β in cell lysates and cell culture supernates using an enzyme-linked immunosorbent assay （ELISA）. Moreover, an ultrahigh performance liquid chromatography and tandem mass spectrometry （UPLC-MS/MS） method was used for the detection of XOD activity and the screening of XOD inhibitors in this research. The amount of uric acid from each analyte was directly detected using the multiple reaction monitoring mode and the uric acid level could be reduced via the addition of an inhibitor. Results indicated that Salviae Miltiorrhizae Radix et Rhizome, Rhei Radix et Rhizoma, Polygoni Cuspidati Rhizoma et Radix, Selaginellae Herba, Paeoniae Radix Rubra, especially Ginkgo Folium seemed to be more effective in anti-inflammation and inhibiting XOD activity. The anti-inflammation and enzyme inhibitory activities of the herbal extracts may be correlated with their bioactive components. And the differences between the herbal extracts were correlated with the amount of flavonoid and anthraquinone components. In our study, we have investigated the potential anti-inflammation bioactivity of 33 herbal extracts in vitro, which could provide a reference for further in vivo research in the orevention and treatment of gout.

关键词： Gout Inflammation Human umbilical vein endothelial cells Xanthine oxidase UPLC-MS/MS

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Experimental study on the mechanisms of fault reactivation and coal bumps induced by mining

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Journal of Coal Science & Engineering(China) 2013年第4期19卷 507-513页

作者： Yao-Dong JIANG Tao WANG yi-xin ZHAO Wen-Jie WANG State Key Lab of Coal Resources and Safe Mining China University of Mining and Technology (Beijing) Beijing 100083 China School of Mechanics and Civil Engineering China University of Mining and Technology (Beijing) Beijing 100083 China Faculty of Resources and Safety Engineering China University of Mining and Technology (Beijing) Beijing 100083 China ian University Tianjin 300384 China

Experiments simulating the effect of coal mine stopping through a fault zone were designed based on a working face of the Qianqiu coal mine in yima, China. Through simulation of the physical process of fault reactivation and coal bumps, the displacement of the surrounding strata and evolution characteristics of fault stress under the effect of mining were studied. The mechanism of fault reactivation induced by coal mining was analyzed. The results show that shortly before fault reactiva- tion, the normal stress and shear stress increased rapidly and the risk of a fault slip occurring was also increased. The fault reac- tivation, caused by the mining activity, occurred when the working face was 25-35 m from the fault along the hanging wall. The influence of mining increased the possibility of fault reactivation, while the local failure of the bearing capacity of the working face was the direct cause of the fault slip. Our results indicate that the influence of fault slip on the coal of the working face had a transient impact and acted as a loading-unloading function.

关键词： coal bumps fault reactivation digital speckle similar simulation experiment

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Preparation and properties of high-energy-density aluminum/boroncontaining gelled fuels

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Chinese Journal of Chemical Engineering 2024年第1期65卷 230-242页

作者： yi Chen Kang Xue Yang Liu Lun Pan Xiangwen zhang Ji-Jun Zou Key Laboratory for Green Chemical Technology of the Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Collaborative Innovative Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China Zhejiang Institute of Tianjin University Ningbo 315201China

Energetic nanofluid fuel has caught the attention of the field of aerospace liquid propellant for its high energy density(HED), but it suffers from the inevitable solid-liquid phase separation problem. To resolve this problem, herein we synthesized the high-Al-/B-containing(up to 30%(mass)) HED gelled fuels, with low-molecular-mass organic gellant Z, which show high net heat of combustion(NHOC), density, storage stability, and thixotropic properties. The characterizations indicate that the application of energetic particles to the gelled fuels obviously destroys their fibrous network structures but can provide the new particle-gellant gelation microstructures, resulting in the comparable stability between 1.0%(mass) Z/JP-10 + 30%(mass) Al or B and pure JP-10 gelled fuel. Moreover, the gelled fuels with high-content Al or B exhibit high shear-thinning property, recovery capability, and mechanical strength, which are favorable for their storage and utilization. Importantly, the prepared 1.0%(mass) Z/JP-10 + 30%(mass) B(or 1.0%(mass) Z/JP-10 + 30%(mass) Al) shows the density and NHOC 1.27 times(1.30) and 1.43 times(1.21)higher than pure JP-10, respectively. This work provides a facile and valid approach to the manufacturing of HED gelled fuels with high content of energetic particles for gel propellants.

关键词： Gelled fuels Energetic aluminum/boron Low-molecular-mass organic gellant Fuel property

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Microstructures and properties of Al_2O_3 dispersion-strengthened copper alloys prepared through different methods

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International Journal of Minerals,Metallurgy and Materials 2016年第12期23卷 1437-1443页

作者： Zhi-qiao Yan Feng Chen Fu-xing Ye Dong-ping zhang yi-xiang Cai Guangdong Institute of Materials and Processing Guangdong Academy of Sciences State Key Laboratory of Powder Metallurgy Central South University

Al2O3 dispersion copper alloy powder was prepared by intemal oxidation, and three consolidation methods--high-velocity compaction （HVC）, hot pressing （HP）, and hot extrusion （HE）--were used to prepare Al2O3 dispersion-strengthened copper （Cu-Al2O3） alloys. The microstructures and properties of these alloys were investigated and compared. The results show that the alloys prepared by the HP and HE methods exhibited the coarsest and finest grain sizes, respectively. The alloy prepared by the HVC method exhibited the lowest relative density （98.3% vs. 99.5% for HP and 100% for HE）, which resulted in the lowest electrical conductivity （81% IACS vs. 86% IACS for HP and 87% IACS for HE）. However, this alloy also exhibited the highest hardness （77 HRB vs. 69 HRB for HP and 70 HRB for HE）, the highest compressive strength （443 MPa vs. 386 MPa for I/P and 378 MPa for HE）, and the best hardness retention among the investigated alloys. The results illustrate that the alloy prepared by the HVC method exhibits high softening temperature and good mechanical properties at high temperatures, which imply long service life when used as spot-welding electrodes.

关键词： dispersion-strengthened alloys copper alloys alumina preparation methods microstructure properties

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Multi-Electron Transfer of Ar^(+) Colliding with Ne Atoms Based on a Time-Dependent Density-Functional Theory

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Chinese Physics Letters 2021年第6期38卷 24-29页

作者： Shuai Qin Cong-zhang Gao Wandong Yu yi-Zhi Qu School of Optoelectronics University of Chinese Academy of SciencesBeijing 100049China Institute of Applied Physics and Computational Mathematics Beijing 100088China State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of PhysicsPeking UniversityBeijing 100871China

The multi-electron capture and loss cross-sections of Ar^(+)-Ne collisions are calculated at absolute energies in the few-keV/*** calculations are performed using a novel inverse collision framework,in the context of a time-dependent density functional theory,combined with molecular *** extraction of the capture and loss probabilities is based on the particle-number projection technique,originating from nuclear physics,but validly extended to represent many-electron *** agreement between experimental and theoretical data is found,which clearly reveals the non-negligible post-collision decay of the projectile’s electrons,providing further evidence for the applicability of the approach to complex many-electron collision systems.

关键词： dynamics collision negligible

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Comparative efficacy and safety of Chinese herbal injections combined with transcatheter hepatic arterial chemoembolization in treatment of liver cancer: a bayesian network Meta-analysis

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Journal of Traditional Chinese Medicine 2020年第2期40卷 167-187页

作者： zhang Dan Wang Kaihuan Zheng Jiewen Wu Jiarui Duan Xiaojiao Ni Mengwei Liu Shuyu zhang Bing Zhao yi Department of Clinical Pharmacology of Traditional Chinese Medicine School of Chinese Materia MedicaBeijing University of Chinese MedicineBeijing 100102China

OBJECTIVE: To address the optimal Chinese herbal injections(CHIs) against liver cancer, the present network Meta-analysis is designed to investigate the comparative efficacy and safety of different ***: Several electronic databases were searched up to June 1 st, 2017. The quality assessment was conducted and network Meta-analysis was performed to compare the efficacy and safety of different CHIs plus transcatheter hepatic arterial chemoembolization(TACE). Primary outcomes were 1-year and 2-year survival rate, the secondary outcomes includes the clinical effective rate, performance status and the adverse reactions(ADRs). Data analysis was applied Stata 13.0 and Win BUGS 1.4 ***: A total of 105 randomized controlled trials(RCTs) were identified for inclusion in this analysis, with data for 7683 patients and 13 CHIs. The results suggested that Javanica oil emulsion,Huachansu injection plus TACE were more favorable for 1-year and 2-year survival rate than other CHIs. Kanglaite, Astragalus polysaccharide injection plus TACE showed superiority in the clinical effective rate and performance status over other *** Shenmai injection plus TACE was superior to reducing ADRs than other CHIs for patients with liver ***: Our findings indicated that receiving CHIs combined with TACE may have therapeutic benefits for patients with liver cancer in improving survival rate, clinical effective rate, the performance status and alleviating the ADRs.

关键词： Liver neoplasms Chemoembolization,therapeutic Drugs,Chinese herbal Injections Network Meta-analysis

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Recent progress and strategies of cathodes toward polysulfides shuttle restriction for lithium-sulfur batteries

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Rare Metals 2024年第9期43卷 4132-4161页

作者： xing-You Rao Shuang-Fei Xiang Jian Zhou Zhen zhang Xiang-Yu Xu Yuan-Yuan Xu xin-Chi Zhou Zheng-Dao Pan Su-Chong Tan Shi-xing Dong Zhou-Lu Wang Yu-Tong Wu Yun-Lei Zhou Xiang Liu yi zhang Shan Jiang School of Energy Sciences and Engineering Nanjing Tech UniversityNanjing 211816China School of Materials Science and Engineering and Institute of Smart Fiber Materials Zhejiang Sci-Tech UniversityHangzhou 310018China JiangSu Sailboat Petrochemical Co. LtdLianyungang 222000China Hangzhou Institute of Technology Xidian UniversityHangzhou 311200China

Lithium-sulfur batteries(LSBs)have already developed into one of the most promising new-generation high-energy density electrochemical energy storage systems with outstanding features including high-energy density,low cost,and environmental ***,the development and commercialization path of LSBs still presents significant limitations and challenges,particularly the notorious shuttle effect triggered by soluble longchain lithium polysulfides(LiPSs),which inevitably leads to low utilization of cathode active sulfur and high battery capacity degradation,short cycle life,*** research efforts have been conducted to develop various sulfur host materials capable of effectively restricting the shuttle *** review firstly introduces the fundamental electrochemical aspects of LSBs,followed by a comprehensive analysis of the mechanism underlying the shuttle effect in Li–S batteries and its profound influence on various battery components as well as the overall battery ***,recent advances and strategies are systematically reviewed,including physical confinement,chemisorption,and catalytic conversion of sulfur hosts for restricting LiPSs shuttle *** interplay mechanisms of sulfur hosts and LiPSs are discussed in detail and the structural advantages of different host materials are ***,key insights for the rational design of advanced host materials for LSBs are provided,and the upcoming challenges and the prospects for sulfur host materials in lithium-sulfur batteries are also explored.

关键词： Lithium-sulfur batteries Polysulfides Shuttle effect Host

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Constructing 2D bismuth-based heterostructure for highly efficient photocatalytic CO2 reduction

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Tungsten 2025年第1期 71-79页

作者： Ruo-Hang Xu Hao-Yu Jiang Dan-Dan Cui Kun-Rong Du Hong-Run zhang Sheng-Jie Xu Ya-Qi Li Zhi-Zhen Ren Liang Wang Wei-Chang Hao yi Du School of Physics and BUAA-UOW Joint Research Centre Beihang University Shenzhen Institute of Beihang University Centre for Catalysis and Clean Energy School of Environment and Science Griffith University

Reforming carbon dioxide（CO2） into fuels and valuable chemicals using solar energy holds significant potential for emission reduction and addressing energy supply *** recombination of photocarriers remains a major obstacle,however,to enhancing solar energy conversion efficiency in the photocatalytic reaction *** two-dimensional materials,constructing heterogeneous structures has emerged as an effective strategy to enhance the separation of photoexcited carriers by leveraging the internal electric field at the heterogeneous ***,we present a facile strategy for preparing Bi4NbO8Br/Bi2WO6plate-on-plate Z-scheme junctions with a strong internal electric field by in situ *** unique heterostructure facilitates efficient separation and transport of photoexcited charges by harnessing the internal electric field induced by chemical bonding at the lateral ***,the Bi4NbO8Br/Bi2WO6heterostructure exhibits enhanced CO2photoreduction properties,along with a CO yield rate of approximately 35 μmol·g-1·h-1under full light *** work offers novel insights into the synthesis of unique hetero structures intended to enhance the efficiency of photocatalytic CO2reduction.

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