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Synthesis of Highly Regioregular, Head-to-Tail Coupled Poly(3-octylesterthiophene) via C―H/C―H Coupling Polycondensation

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Chinese Journal of Polymer Science 2018年第9期36卷 1019-1026页

作者： Qiang Zhang Yue-Feng Li Lu-Di Deng lin-lin zhao Chen-Xi Li Yan Lu Tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science & Engineering Tianjin University of Technology Key Laboratory of Functional Polymer Materials State Key Laboratory of Elemento-Organic Chemistry College of Chemistry Nankai University

Highly regioregular, head-to-tail coupled poly（3-octylesterthiophene） was synthesized by the Pd-catalysed oxidative C--H/C--H coupling polycondensation. The regioregularity of polymer products was confirmed by the 1H-NMR technique. Furthermore, the effects of various reaction factors including polymerization temperature, solvents and catalysts etc. on the yield, molecular weight and structural regioregularity of the resultant polymers were systematically studied. The optical, electrochemical and crystallization properties of the resultant P3OET with different HT regioregularities in solution and film state were studied by UV-Vis and fluorescent spectroscopy, cyclic voltammetry and X-ray diffraction （XRD）, resepectively.

关键词： C--H/C--H coupling polymerization Pd catalysed oxidative Poly(thiophene)s

Crystal structures and sign reversal Hall resistivities in iron-based superconductors Lix(C3H10N2)0.32FeSe（0.15

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Chinese Physics B 2019年第6期28卷 389-402页

作者： Rui-Jin Sun Shi-Feng Jin Jun Deng Mu-Nan Hao lin-lin zhao Xiao Fan Xiao-Ning Sun Jian-Gang Guo lin Gu Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Physical Sciences University of Chinese Academy of SciencesBeijing 101408China

Heavy electron-doped FeSe-derived materials have attracted attention due to their uncommon electronic structures with only ‘electron pockets’, and they are different from other iron-based superconductors. Here, we report the crystal structures, superconductivities and normal state properties of two new Li-doped FeSe-based materials, i.e.,Li0.15(C3H10N2)0.32 FeSe(P-4) and Lix(C3H10N2)0.32 FeSe(P4/nmm, 0.25 ling between Li concentration and the orientation of 1,3-diaminopropane molecules within the largely expanded FeSe layers. Superconducting fluctuations appear in the resistivity of the two superconductors and are fitted in terms of the quasi two-dimensional(2 D) Lawrence–Doniach model. The existence of a crossing point and scaling behavior in the T-dependence of diamagnetic response also suggests that the two superconductors belong to the quasi-2 D system. Interestingly, with the increase of temperature, a sign of Hall coefficient(RH) reversing from negative to positive is observed at ~185 K in both phases, suggesting that‘hole pockets’ emerge in these electron-doped FeSe materials. First principle calculations indicate that the increase in FeSe layer distance will lift up a ‘hole band’ associated with dx2-y2 character and increase the hole carriers. Our findings suggest that the increase in two dimensionalities may lead to the sign-reversal Hall resistivity in Lix(C3H10N2)0.32 FeSe at high temperature.

关键词： superconductor Lawrence–Doniach model dimensionality

Semen microbiota in normal and leukocytospermic males

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Asian Journal of Andrology 2022年第4期24卷 398-405页

作者： Ye Yao Xin-Jian Qiu Dong-Sheng Wang Jie-Kun Luo Tao Tang Yun-Hui Li Chun-Hu Zhang Hao Liu Lu Zhou lin-lin zhao Health Management Center The Third Xiangya HospitalCentral South UniversityChangsha 410013China Institute of Integrated Traditional Chinese and Western Medicine Xiangya HospitalCentral South UniversityChangsha 410005China Department of Nephrology Integrated Hospital of Traditional Chinese and Western MedicineSouthern Medical UniversityGuangzhou 510220China Department of Traditional Chinese Medicine Guangdong Second Provincial General HospitalGuangzhou 510220China

Large numbers of microbes can be present in seminal fluid,and there are differences in the semen microbiota between normal and abnormal semen *** evaluate the semen microbiota in patients with leukocytospermia,87 seminal fluid samples,including 33 samples with a normal seminal leukocyte count and 54 samples with leukocytospermia,were obtained for a cross-sectional *** samples with a normal seminal leukocyte count had normal sperm parameters(Control group),and 13 samples with a normal seminal leukocyte count were from asthenozoospermia patients(Ast group).However,32 samples with leukocytospermia were from asthenozoospermia patients(LA group),and only 22 samples with leukocytospermia had normal sperm parameters(Leu group).The 16S ribosomal RNA(rRNA)gene sequencing method was used to sequence the microbiota in the seminal fluid,and multiple bioinformatics methods were utilized to analyze the ***,the results showed that the worse sperm parameters were observed in the leukocytospermia-related *** microbiota analysis found that there was increased alpha diversity in the leukocytospermia-related ***,Proteobacteria,Actinobacteria,and Bacteroidetes were the primary phyla in the seminal *** microbiota profiles,namely,Lactobacillus-enriched and Streptococcus-enriched groups,were identified in this *** majority of the samples in the groups with a normal seminal leukocyte count could be categorized as Lactobacillus-enriched,whereas the majority of the leukocytospermia samples could be categorized as *** study indicated that males with leukocytospermia have worse sperm parameters and a different semen microbiota composition compared to males with a normal seminal leukocyte count.

关键词： 16S rRNA gene sequencing asthenozoospermia leukocytospermia semen microbiota sperm motility

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不同加载速率下岩石变形场演化试验研究

岩土力学 2017年第10期38卷 2773-2779,2788页

作者：宋义敏邢同振邓琳琳赵泽鑫北方工业大学土木工程学院北京100144

开展不同加载速率条件下岩石变形场演化特征的试验研究,对岩石安全施工及岩石工程灾害预测预警等具有重要意义。通过不同加载速率下红砂岩单轴压缩试验,在以数字散斑相关方法分析试件变形场的基础上,对加载速率与岩石变形局部化演化特... 详细信息

开展不同加载速率条件下岩石变形场演化特征的试验研究,对岩石安全施工及岩石工程灾害预测预警等具有重要意义。通过不同加载速率下红砂岩单轴压缩试验,在以数字散斑相关方法分析试件变形场的基础上,对加载速率与岩石变形局部化演化特征、泊松比变化及能量积累和释放特征的对应关系进行分析。结果表明:随着加载速率的增加,岩石试件的峰值强度及脆性呈增加趋势。加载速率越大岩石试件的变形局部化启动应力越接近强度峰值,且变形局部化启动时对应的应力量值总体上呈增加的趋势。在不同量级加载速率下岩石试件泊松比量值差别明显,总体趋势表现为:在岩石试件变形局部化启动前,随着加载速率增加,岩石试件泊松比减小;在岩石试件变形局部化阶段,随着加载速率增加,岩石试件泊松比增大。在能量积累阶段,岩石试件最大变形能密度随加载速率增加而增大;在能量释放过程中,岩石试件能量释放速率随着加载速率增加而增大。

关键词：加载速率变形局部化数字散斑相关方法泊松比能量演化

Economic plant resources of Lal Suhanra national park of bahawalpur, pakistan: anthropogenic factors and conservation strategies

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Economic plant resources of Lal Suhanra national park of bah...

“Zero‑Strain” NiNb_(2)O_(6) Fibers for All‑Climate Lithium Storage

中国植物学会第十六次全国会员代表大会暨85周年学术年会

作者： Hafiz Muhammad Wariss Wei-Bang Sun Yong Peng Ma lin-lin zhao Shazia Anjum Saeed Ahmad Khurshid Alam Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Populations Kunming Institute of BotanyChinese Academy of Sciences Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of Sciences University of Chinese Academy of Sciences Cholistan Institute of Desert Studies TheIslamia University of Bahawalpur University College of Agriculture University of Sargodha Department of Forestry Rang & Wildlife ManagementTheIslamia University of Bahawalpur

The Lal Suhanra National Park（LSNP） with its 65790.36 hectares surface area is located on southeastern part of the Punjab Province of *** distinguished by its unique topography and habitat heterogeneity,is comprised of three different ecosystems namely irrigated forest plantation,desert area/dry land and Pati Sir Lake（Pond area）.Due to high diversity of wildlife,microhabitats and natural vegetation,picnic spots and fishing in the pond area,in 1972 it was designated as Biosphere Reserve Protected *** vegetation is threatened by expanding agriculture,deforestation and climate *** presented an ethnobotanical inventory among local communities and discuss the effects of vegetation change on the availability of useful *** organized expeditions to explore the whole area and collected plant *** used semi-structured,in-depth interviews to gather the ethnobotanical information about plant *** LSNP flora consists of 212 species belonging to 162 genera and 50 *** was the leading family that contributed 43 grasses,followed by Fabaceae（16 spp.）,Asteraceae（15 spp.）,Chenopodiaceae（10 spp.）.We encountered 126 useful plants,Poaceae was the most species-rich family in economic value,followed by Asteraceae,Chenopodiaceae,and *** studies revealed that the inhabitants are very well familiar with diversity of the medicinal plant and now the use of these diversified medicinal plants has been extended even to the national *** has become a common treatment for their ailments on the one hand and also serves the purpose of their everyday requirement of food,fodder,shelter,fuel wood and *** was observed that the local people were least concerned about the conservation status of these natural resources and exploit them ruthlessly even sometimes to the level of their ***,the study area is facing a severe threat of anthropogenic interference that is entirely destructive for the endemic plant spec

关键词： National park plant diversity economic value anthropogenic factors conservation

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Nano-Micro Letters 2025年第1期17卷 348-360页

作者： Yan zhao Qiang Yuan Liting Yang Guisheng Liang Yifeng Cheng Limin Wu Chunfu lin Renchao Che College of Physics Donghua UniversityShanghai 201620People’s Republic of China School of Materials Science and Engineering Institute of Materials for Energy and EnvironmentQingdao UniversityQingdao 266071People’s Republic of China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China Inner Mongolia University Hohhot 010021People’s Republic of China

Niobates are promising all-climate Li^(+)-storage anode material due to their fast charge transport,large specific capacities,and resistance to electrolyte ***,their moderate unit-cellvolume expansion(generally 5%–10%)during Li^(+)storage causes unsatisfactory long-term ***,“zero-strain”NiNb_(2)O_(6) fibers are explored as a new anode material with comprehensively good electrochemical *** Li^(+)storage,the expansion of electrochemical inactive NiO_(6) octahedra almost fully offsets the shrinkage of active NbO_(6) octahedra through reversible O *** superior volume-accommodation capability of the NiO_(6) layers guarantees the“zero-strain”behavior of NiNb_(2)O_(6) in a broad temperature range(0.53%//0.51%//0.74%at 25//−10//60℃),leading to the excellent cyclability of the NiNb_(2)O_(6) fibers(92.8%//99.2%//91.1%capacity retention after 1000//2000//1000 cycles at 10C and 25//−10//60℃).This NiNb_(2)O_(6) material further exhibits a large reversible capacity(300//184//318 mAh g−1 at 0.1C and 25//−10//60℃)and outstanding rate performance(10 to 0.5C capacity percentage of 64.3%//50.0%//65.4%at 25//−10//60℃).Therefore,the NiNb_(2)O_(6) fibers are especially suitable for large-capacity,fast-charging,long-life,and all-climate lithium-ion batteries.

关键词： NiNb_(2)O_(6)porous fiber “Zero-strain”mechanism Electrochemical property Harsh-temperature operation Operando characterization

Machine learning driven rational design of dual atom catalysts on graphene for carbon dioxide electroreduction

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Nano Research 2025年第1期18卷 186-194页

作者： Dongxu Jiao Xinyi Li Mingzi Sun lin Liu Jinchang Fan Jingxiang zhao Bolong Huang Xiaoqiang Cui State Key Laboratory of Automotive Simulation and Control School of Materials Science and Engineeringand Key Laboratory of Automobile Materials of MOEJilin UniversityChangchun 130012China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina College of Chemistry and Chemical Engineering and Key Laboratory of Photonic and Electronic Bandgap MaterialsMinistry of EducationHarbin Normal UniversityHarbin 150025China

The development of high-performance atomiccatalysts for the carbon dioxide reduction reaction(CO_(2)RR)is atime-consuming process due to the complexity of the reactionmechanism and the uncertainty of the active ***,wehave proposed combining density functional theory(DFT)andmachine learning(ML)to investigate the potential of topologicalgraphene-based dual-atom catalysts(DACs)as CO_(2)*** analyzing the ML results,we identify thenumber of d-orbital electrons in the active site as a key factorinfluencing the CO_(2)RR catalytic ***,wepropose a simple descriptor to measure the CO_(2)RR activity ofthese *** findings provide plausible explanations for thesynergistic interactions between bimetallic atoms in CO_(2)RR andallow us to screen the homogeneous Ni-Ni pair as the mostpromising dual-atom *** work offers a fast MLapproach based on limited DFT calculations to predict the mostelectroactive and stable DACs on carbon support for CO_(2)RR,facilitating rapid screening of high-performance dual-atomcatalysts.

关键词： CO_(2)reaction reduction dual-atom catalysts density functional theory machine learning

Dynamically self-adjustable liquid-liquid and self-adaptive softcontact solid-solid triboelectric nanogenerator for wave energy harvesting

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Nano Research 2025年第1期18卷 404-414页

作者： Yong Long Bingqi zhao Jianan Niu Yuxiu Liu Wei Sha Jiangwen Wang Zhong lin Wang Weiguo Hu Guangzhou Institute of Blue Energy Knowledge CityHuangpu DistrictGuangzhou 510555China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Water wave energy exhibits great potential toalleviate the global energy crisis. However, harvesting andutilizing wave energy are challenging due to its irregularity,randomness, and low frequency. Triboelectric nanogenerators(TENGs) have gained significant attention for harvesting waveenergy with high efficiency. This study presents a novelellipsoidal, pendulum-like TENG integrating both liquid-liquid(L-L) and solid-solid (S-S) triboelectricity (LS-TENG). Thisinnovative design enables continuous wave energy harvestingand self-powered marine environment monitoring under variousconditions, including temperature, humidity, and light intensity. The binary immiscible liquids within the LS-TENG’s innersoft balloon create dynamic, and self-adjustable L-L contact interfaces, significantly increasing the L-L contact area andenhancing L-L contact electrification (CE). The unique self-adaptive, soft S-S contact increases the S-S contact areacompared to traditional hard point contact, better adapting to the irregular movements of waves and promoting efficient S-SCE. The LS-TENG achieves highly efficient wave energy harvesting by coupling L-L and S-S CE. Furthermore, the uniquesoft contact design protects the S-S interfaces from mechanical wear and damage during long-term work. The LS-TENG’snovel structure provides an innovative and effective way for water wave energy harvesting.

关键词： self-adaptive soft-contact solid-solid liquid-liquid self-adjustable triboelectric nanogenerator

A novel coupled-enzyme method for O-linked GIcNAc transferase activity assay

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A novel coupled-enzyme method for O-linked GIcNAc transferas...