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A small molecular electron acceptor based on asymmetric hexacyclic core of thieno[1,2-b]indaceno[5,6-b']thienothiophene for efficient fullerene-free polymer solar cells

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Science Bulletin 2018年第13期63卷 845-852页

作者： Wenchao zhai Ailing Tang bo Xiao Xiaochen Wang Fan Chen Erjun Zhou CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences

A novel A-D-A （acceptor-donor-acceptor） type non-fullerene small molecule, A201, consisting of an asymmetric thieno[1,2-b]indaceno[5,6-b＇lthienothiophene （TITI＇） unit as middle D part and 2-（3-oxo-2, 3-dihydroinden-l-ylidene） malononitrile （IC） groups as end-capped A parts was designed and synthesized. The asymmetric TITT building block showed a higher dipole moment of 0.85 Debye （1 Debye = 3.33564 × 10^-3μcm） compared with the symmetric analogues of indacenodithiophene （IDT） and indacenodithieno[3,2-b]thiophene （IDTr） of 0.098 and 0.13 Debye, respectively. The solution-processed bulk heterojunction solar cells using a benzotriazole （BTA）-based polymer of J71 as donor and A201 as acceptor, showed a power conversion efficiency （PCE） of 9.36% with an open-circuit voltage （Voc） of 0.88 V, a short-circuit current Use） of 13.15 mA cm^-2, and a fill factor （FF） of 0.B7, under the illumination of AM 1.5G at 100 mW cm^-2. The high PCE of this material combination could be attributed to its broad absorption spectrum and the high hole mobility （#h） and electron mobility （μh） of 9.56 × 10^-4 and 5.1× 10^-4 cm^2 V^-1 s^-1, respectively. These results indicate that the asymmetric electron-donating segments are promising to construct A-D-A type small molecular acceptors, which could largely enhance the diversity of building blocks to design photovoltaic materials.

关键词： Non-fullerene Polymer solar cells Small molecular acceptor Asymmetric

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Realizing high initial Coulombic efficiency in manganese-based layered oxide cathodes for sodium-ion batteries via P2/O'3 biphasic structure optimization

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Rare Metals 2024年第5期43卷 2093-2102页

作者： bo peng Zi-Hao Zhou Ping Xuan Jie Xu Lian-bo Ma School of Materials Science and Engineering Anhui University ofTechnologyMa'anshan 243002China Anhui Product Quality Supervision&Inspection Research Institute Hefei 230051China

Mn-based layered oxides are among the most promising cathode materials for sodium-ion batteries owing to the advantages of abundance,environmenta friendliness,low cost and high specific capacity.P2 and O'3 are two representative structures of Mn-based layered ***,the P2 structure containing insufficien Na generally exhibits low initial charge capacity,while O'3structure with sufficient Na delivers high initial charge capacity but poor cycle *** study prepared a multitude of Na_(x)MnO_(2)(x=0.7,0.8,0.9)cathode materials with varying P2/O'3 ratios and further investigated their electrochemical *** optimized Na_(0.8)MnO_(2) comprising 69.9 wt%O'3 and 30.1 wt%P2 phase,exhibited relatively balanced specific capacity,Coulombic efficiency and cycle ***,it achieved a high specific capacity of 128.9 mAh·g^(-1) with an initia Coulombic efficiency of 98.2%in half-cell configuration The Na_(0.8)MnO_(2)//hard carbon full cell also achieved a high specific capacity of 126.7 mAh·g^(-1) with an initia Coulombic efficiency of 98.9%.Moreover,the capacity fading mechanism was revealed by combining in-situ and ex-situ X-ray *** findings of this study provide theoretical guidance for further modification design of Mnbased layered cathodes.

关键词： Sodium-ion batteries Cathode materials Mn-based layered oxides P2/0'3 composites

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Post-synthesis and catalytic performance of FER type sub-zeolite Ti-ECNU-8

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Chinese Chemical Letters 2014年第12期25卷 1511-1514页

作者： bo-Ting Yang peng Wu Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of ChemistryEast China Normal University

A titanosilicate Ti-ECNU-8 with a FER type sub-zeolite structure was developed by pots-synthesis and applied to the epoxdiation of alkenes with hydrogen peroxide.A controlled acid treatment on the pure silica layered precursor PLS-3 of FER topology gave rise to a sub-zeolite *** of a collection of FER sheets without an ordered stacking manner along layer related[100]direction,the structure of ECNU-8 was constructed by a reorientation of interlayer hydrogen bond moieties caused by partial removal of interlayer organic structure directing ***-8 possessed an external surface area enlarged by ca.30% in comparison to corresponding three-dimensional FER *** a solid-gas reaction with TiCl4 vapor,tetrahedral Ti active sites were introduced into the *** resultant Ti-ECNU-8 retained the structural properties of ECNU-8,and exhibited an excellent catalytic performance for the epoxidation of cycloalkenes owing to the accessible Ti sites located in open reaction space.

关键词： Sub-zeolite ECNU-8 Titanosilicate Epoxidation Layered zeolite

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Multi-regional input-output analysis for China＇s regional CH4 emissions

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Frontiers of Earth Science 2014年第1期8卷 163-180页

作者： bo ZHANG Jiashuo LI Beihua peng Center for Resource and Environmental Policy Research School of Management China University of Mining & Technology (Beijing) Beijing 100083 China State Key Laboratory of Coal Resources and Safe Mining China University of Mining & Technology (Beijing) Beijing 100083 China College of Engineering Peking University Beijing 100871 China China Shenhua Overseas Development and Investment Company Ltd. Beijing 100011 China

China is the largest CH4 emitter in the world. Given the importance of CH4 in greenhouse gas emission inventories, the characteristics ofChina＇s CH4 emissions at different scales deserve to be fully understood. Presented in this paper is an interprovincial input output embodi- ment analysis of China＇s regional CH4 emissions in 2007, based on the most recently available multi-regional input- output table, and relevant CH4 emissions data. The results show that the eastern, central and western areas contribute to 48.2%, 28.6%, and 23.3% of the national total embodied emissions, respectively. Guangdong has the highest level of embodied CH4 emissions among all of the 30 regions. The Agriculture sector produces the most embodied CH4 emissions in final demand, followed by the Construction, Food Production and Tobacco Processing, and Other Service Activities sectors. Significant net transfers of embodied CH4 emission flows are identified from the central and western areas to the eastern area via interregional trade. Shanxi is the largest interregional exporter of embodied CH4 emissions. In contrast, Guangdong is the largest interregional importer. Energy activities, agricultural activities, and waste management comprise 65.6%, 30.7%, and 3.7% of the total embodied CH4 emissions in interregional trade, respectively. By using consumption-based accounting principles, the emis- sion magnitudes, per capita emissions, and emission intensities of most eastern regions increase remarkably, while those of some central and western regions decrease largely. To achieve regional CH4 emission mitigation, comprehensive mitigation measures should be designed under consideration of regional transfer of emission responsibility.

关键词： China's CH4 emissions multi-regional input-output analysis consumption-based emission accounting

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Additive manufacturing of porous magnesium alloys for biodegradable orthopedic implants:Process,design,and modification

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Journal of Materials Science & Technology 2024年第15期182卷 79-110页

作者： bo peng Haojing Xu Fei Song peng Wen Yun Tian Yufeng Zheng State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China Institute for Precision Medicine Tsinghua University Beijing Tsinghua Changgung HospitalBeijing 102218China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China Department of Orthopedics Peking University Third HospitalBeijing 100191China Department of Materials Science and Engineering Peking UniversityBeijing 100871China

Biodegradable magnesium(Mg)alloys exhibit excellent biocompatibility,adequate mechanical properties,and osteogenic *** can contribute to complete recovery of damaged tissues without concerns about a second surgery and have achieved clinical applications in orthopedic and cardiovascular *** scaffolds can provide functions such as bone integration and adjustable mechanical properties,thus widely used for bone *** manufacturing(AM)offers the advantages of design freedom and high precision,enabling the reliable production of porous scaffolds with customized *** combination of biodegradable Mg alloys,porous scaffolds,and AM processes has created tremendous opportunities for the precision treatment of bone *** article reviews the current development in the additive manufacturing process and design of Mg alloy biodegradable orthopedic implants,fo-cusing on chemical compositions,structural design,surface treatment,and their effects on mechanical properties,degradation behavior,and ***,the future perspective of porous Mg alloy biodegradable orthopedic implants is proposed.

关键词： Biodegradable magnesium alloys Additive manufacturing Laser powder bed fusion Orthopedic implants Porous structure design Degradation behavior

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Copper-Catalyzed Si-H bond Insertion Polymerization for Synthesis of Optically Active Polyesters Containing Silicon

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Chinese Journal of Chemistry 2022年第1期40卷 21-27页

作者： Xiao-Yong zhai Xiao-Qing Wang bo Wu Yong-Gui Zhou State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianLiaoning 116023China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

The synthesis and characterization of chiral polymers with diverse structure remain a long-term challenging research ***,a copper-catalyzed enantioselective insertion of carbene into Si-H bond was applied to polycondensation,giving a new type of optically active degradable polyesters containing Si-C bond in the main *** polymerization features mild condition,broad substrate scope,excellent yields and *** diols could be obtained via reduction of optically active *** analysis indicated these chiral polyesters exhibit good thermal stability.

关键词： Polymerization Insertion Asymmetric catalysis Optically active polyesters Copper

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Synthesis, Crystal Structure and Fungicidal Activity of 3-(Difluoromethyl)-1-methyl-N-((2-(trifluoromethyl)phenyl) carbamoyl)-1H-pyrazole-4-carboxamide

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Chinese Journal of Structural Chemistry 2019年第5期38卷 706-712,668页

作者： SUN Na-bo zhai Zhi-Wen TONG Jian-Ying CAI peng-peng HE Fang-Yue HAN Liang LIU Xing-Hai College of Biology and Environmental Engineering Zhejiang Shuren University Hangzhou 310015 China College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 China

The title compound 3-（difluoromethyl）-1-methyl-N-（（2-（trifluoromethyl）phenyl）-carbamoyl）-1 H-pyrazole-4-carboxamide(C14 H11 F5 N4 O2) was synthesized, and its structure was confirmed by 1 H NMR, H RMS and X-ray diffraction. It crystallizes in monoclinic system, space group P21/n with a = 6.994（3）, b = 13.860（6）, c = 15.308（7） ?, β = 97.632（6）°, V = 1470.8（11） ?3,Z = 4, the final R = 0.0692 and wR = 0.2108 for 3989 observed reflections with Ⅰ > 2σ（Ⅰ）. The preliminary biological test shows that the title compound has moderate fungicidal activities against Pseudomonas syringae.

关键词： pyrazole acyl urea synthesis crystal structure fungicidal activities

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Synthesis of poly(silyl ether)s via copper-catalyzed dehydrocoupling polymerization

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Chinese Chemical Letters 2022年第5期33卷 2639-2642页

作者： Xiaoqing Wang Yuqing Bai Xiaoyong zhai bo Wu Yonggui Zhou Department of Fine Chemicals State Key Laboratory of CatalysisDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China

The development of efficient method to prepare poly(silyl ether)s(PSEs)is highly ***,an environmentally sustainable copper-catalyzed dehydrocoupling polymerization was developed with good yields and high molecular weight(up to 48,400 of Mn and up to 97%yield).Monomers of different types(AB type or AA and BB type)are suitable to afford *** PSEs show good thermal stability and low glass-transition temperature.

关键词： Poly(silyl ether)s CuH catalysis Dehydrocoupling Environmental and economic benign Good thermal stability

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Coupled Mode of Net Heat Flux and Wind Explain the Formation of the Indian Ocean Dipole

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Journal of Ocean University of China 2023年第4期22卷 910-917页

作者： HAN Shuzong MIAO bo ZHANG Shuiping CHEN Zhentao peng bo College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China College of Marine Science and Technology Hainan Tropical Ocean UniversitySanya 572000China Yazhou Bay Innovation Institute Hainan Tropical Ocean UniversitySanya 572025China College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China Guangdong Eco-Engineering Polytechnic Guangzhou 510520China

Net heat flux,sea surface temperature(SST),and sea surface wind in the northern Indian Ocean were investigated using the TropFlux,ERA5,and J-OFURO3 datasets and correlation analysis,power spectrum analysis,and singular value decomposition(SVD)methods,*** relationships between net heat flux,SST,and sea surface winds were *** coupled modes of net heat flux and wind have been found to explain the SST variations in the Indian Ocean basin and the generation mechanism of the Indian Ocean Dipole(IOD).The correlation between net heat flux and wind is strongly *** SST lags the net heat flux and wind by approximately one month and has strong positive and negative correlations,*** correlation between net heat flux and wind in the northern Indian Ocean is not only seasonal but also regionally dependent on seasonal *** the SVD method,the important role of net heat flux in local sea-air interactions is discussed and identified as the initial perturbation that triggers the SST anomalies in the Southeast Indian Ocean,and the areas with key sea-air interactions and the generation mechanisms of the local sea-air interactions that form the IOD are determined.

关键词： IOD net heat flux heat flux dataset SVD South Asian Monsoon sea-air interaction

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Engineering multifunctional bioactive citrate-based biomaterials for tissue engineering

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Bioactive Materials 2023年第1期19卷 511-537页

作者： Min Wang peng Xu bo Lei Honghui Hospital Xi’an Jiaotong UniversityXi’an710000China Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research College of StomatologyXi’an Jiaotong UniversityXi’an710000China Frontier Institute of Science and Technology Xi’an Jiaotong UniversityXi’an710000China State-Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an710000China State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an710000China

Developing bioactive biomaterials with highly controlled functions is crucial to enhancing their applications in regenerative ***-based polymers are the few bioactive polymer biomaterials used in biomedicine because of their facile synthesis,controllable structure,biocompatibility,biomimetic viscoelastic mechanical behavior,and functional groups available for *** recent years,various multifunctional designs and biomedical applications,including cardiovascular,orthopedic,muscle tissue,skin tissue,nerve and spinal cord,bioimaging,and drug or gene delivery based on citrate-based polymers,have been extensively studied,and many of them have good clinical application *** this review,we summarize recent progress in the multifunctional design and biomedical applications of citrate-based *** also discuss the further development of multifunctional citrate-based polymers with tailored properties to meet the requirements of various biomedical applications.

关键词： Bioactive materials Bioactive polymers Citrate-based biomaterials Multifunctional modification Tissue engineering

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