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Solution-phase synthesis of ordered mesoporous carbon as resonant-gravimetric sensing material for room-temperature H2S detection

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Chinese Chemical Letters 2020年第6期31卷 1680-1685页

作者： Jiawei ni Tao Zhao Lei Tang Pengpeng Qiu wan Jiang Lianjun wang Pengcheng Xu Wei Luo State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringInstitute of Functional MaterialsDonghua UniversityShanghai 201620China State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China College of Life and Environmental Sciences Shanghai Normal UniversityShanghai 200234China University of Chinese Academy of Sciences Beijing 100049China

H2S can cause multiple diseases and poses a great threat to human ***,the precise detection of extremely toxic H2S at room temperature is still a great ***,a facile solvent evaporation induced aggregating assembly(EIAA)method has been applied for the production of ordered mesoporous carbon(OMCs)in an acidic THF/H2 O solution with high-molecular-weight poly(ethylene oxide)-b-polystyrene(PEO-b-PS)copolymers as the structure-directing agent,formaldehyde and resorcinol as carbon *** with the continuous evaporation of THF from the mixed solution,cylindrical micelles are formed in the solution and further assemble into highly ordered *** obtained OMCs possesses a two-dimensional(2 D)hexagonal mesostructure with uniform and large pore diameter(~19.2 nm),high surface area(599 m2/g),and large pore volume(0.92 cm3/g).When being used as the resonant cantilever gas sensor for room-temperature H2S detection,the OMCs has delivered not only a superior gas sensing performance with ultrafast re s ponse(14 s)and recovery(21 s)even at low concentration(2 ppm)but also an excellent selectivity toward H2S among various common interfering ***,the limit of detection is better than 0.2 ppm,indicating its potential application in environmental monitoring and health protection.

关键词： Mesoporous materials Carbon Self-assembly Resonant cantilever gas sensor H2S

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A series of dithienobenzodithiophene based small molecules for highly efficient organic solar cells

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Science China Chemistry 2017年第4期60卷 552-560页

作者： Huanran Feng Miaomiao Li wang ni Bin Kan Yunchuang wang Yamin Zhang Hongtao Zhang Xiangjian wan Yongsheng Chen Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials State Key Laboratory and Institute of Elemento-Organic Chemistry Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) College of Chemistry Nankai University Tianjin 300071 China School of Materials Science and Engineering National Institute for Advanced Materials Nankai University Tianjin 300071 China

Three acceptor-donor-acceptor （A-D-A） small molecules DCAODTBDT, DRDTBDT and DTBDTBDT using dithieno[2,3-d：2＇,3＇-d＇]benzo[1,2-b：4,5-b＇]dithiophene as the central building block, octyl cyanoacetate, 3-octylrhodanine and thiobarbituric acid as the end groups were designed and synthesized as donor materials in solution-processed photovoltaic cells （OPVs）. The impacts of these different electron withdrawing end groups on the photophysical properties, energy levels, charge carrier mobility, morphologies of blend films, and their photovoltaic properties have been systematically investigated. OPVs device based on DRDTBDT gave the best power conversion efficiency （PCE） of 8.34%, which was significantly higher than that based on DCAODTBDT （4.83%） or DTBDTBDT （3.39%）. These results indicate that rather dedicated and balanced consideration of absorption, energy levels, morphology, mobility, etc. for the design of small-molecule-based OPVs （SM-OPVs） and systematic investigations are highly needed to achieve high performance for SM-OPVs.

关键词： acceptor-donor-acceptor dithieno[2,3-d:2',3'-d']benzo[1,2-b:4,5-b']dithiophene solution-processed photovoltaic cells endacceptor moieties

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恩格列净通过上调Epac1表达抑制炎症反应减轻2型糖尿病大鼠肾损伤

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细胞与分子免疫学杂志 2024年第2期40卷 129-134页

作者：钱宇池万璐卢宇欣倪文静杨慧娟潘艳陈卫东蚌埠医科大学第一附属医院肾内科安徽蚌埠233000 蚌埠医科大学临床检验诊断实验室安徽蚌埠233000 蚌埠医科大学基础医学机能学综合实验室安徽蚌埠233000

目的观察恩格列净(EM)对2型糖尿病(T2DM)大鼠肾损伤的治疗效果,并探讨其可能存在的机制。方法将SD雄性大鼠随机分为正常对照(NC)组、 T2DM组和EM组,每组6只。T2DM组和EM组,给予腹腔注射链脲佐菌素(STZ)建立T2DM模型,记录各组大鼠空腹... 详细信息

目的观察恩格列净(EM)对2型糖尿病(T2DM)大鼠肾损伤的治疗效果,并探讨其可能存在的机制。方法将SD雄性大鼠随机分为正常对照(NC)组、 T2DM组和EM组,每组6只。T2DM组和EM组,给予腹腔注射链脲佐菌素(STZ)建立T2DM模型,记录各组大鼠空腹血糖(FBG)和体质量。EM组给予EM溶液灌胃,其余两组予以等量的羧甲基纤维素钠溶液灌胃,给药12周。记录大鼠体质量和FBG后处死大鼠,留存腹主动脉血液和肾脏组织。全自动生化分析仪检测血清肌酐(Scr)、血尿素氮(BUN)、尿酸(UA)、甘油三酯(TG)、总胆固醇(TC);行Masson染色、过碘酸希夫(PAS)染色、 HE染色观察肾脏组织学变化,透射电镜观察肾脏超微结构变化;免疫组织化学染色法检测大鼠肾脏组织中环磷酸腺苷直接激活的交换蛋白1(Epac1)、肿瘤坏死因子α(TNF-α)、白细胞介素1β(IL-1β)、白细胞介素18(IL-18)的表达和分布。结果与NC组相比,T2DM组大鼠体质量下降,FBG、 Scr、 BUN、 UA、 TC、 TG水平明显升高;肾小球基底膜增厚,足细胞足突融合,排列紊乱,内皮细胞窗孔消失;Epac1蛋白表达水平下降,TNF-α、 IL-1β、 IL-18的蛋白表达水平明显增高。与T2DM组相比,EM组大鼠体质量上升,FBG、 Scr、 BUN、 UA、 TC、 TG水平降低;肾损伤减轻,Epac1蛋白表达水平升高,TNF-α、 IL-1β、 IL-18的表达显著降低。结论 EM能够改善T2DM肾损伤。这种治疗效果是通过上调Epac1蛋白表达,抑制炎症反应介导的。

关键词：恩格列净环磷酸腺苷直接激活的交换蛋白1(Epac1) 2型糖尿病(T2DM) 肾损伤炎症反应

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Tandem catalysis of Cu/ni multi-sites promotes oxygen reduction reaction

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Science China Materials 2024年第9期67卷 2934-2940页

作者： Bin-Bin Feng Ke-Ke Chang wan-Feng Xiong Duan-Hui Si Shui-Ying Gao Hong-Fang Li Rong Cao College of Chemistry and Materials Science Fujian Normal UniversityFuzhou350007China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China University of Chinese Academy of Sciences Beijing100049China

The special electronic characteristics and high atom usage efficiency of metal-nitrogen-carbon(M-N-C)materials have made them extremely attractive for oxygen reduction reactions(ORRs).However,it is inevitable that hydrogen peroxide(H_(2)O_(2))will be formed via the two-electron pathway in ***,the Cu nanoparticles(NPs)have been encapsulated into ni doped hollow mesoporous carbon spheres(ni-HMCS)to reduce the generation of H_(2)O_(2)in *** tests confirm that the introduction of Cu NPs improves the ORR performance *** obtained Cu/ni-HMCS exhibits a half-wave potential of 0.82 V *** hydrogen electrode and a limited current density of 5.5 mA cm^(-2),which is comparable with the commercial Pt/***,Cu/ni-HMCS has been used in Zn-air battery,demonstrating a high power density of 161 mW cm^(-2)and a long-term recharge capability(50 h at 5 mA cm^(-2)).The theoretical calculation proposes a tandem catalysis pathway for Cu/ni multi-sites catalysis,that is,H_(2)O_(2)released from the ni-N_(4)and Cu-N_(4)sites migrates to the Cu(111)face,on which the captive H_(2)O_(2)is further reduced to H_(2)*** work demonstrates an interesting tandem catalytic pathway of dual-metal multi-sites for ORR,which provides an insight into the development of effective fuel cell electrocatalysts.

关键词： oxygen reduction reaction tandem catalysis pathway dual-metal multi-sites Cu nanoparticles

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Microstructure evolution of loess under multiple collapsibility based on nuclear magnetic resonance and scanning electron microscopy

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Journal of Mountain Science 2021年第10期18卷 2612-2625页

作者： wanG Hai-man ni wan-kui YUAN Kang-ze LI Lan niE Yong-peng GUO Ye-xia College of Geological Engineering and Geomatics Chang’an UniversityXi'an 710054China Key Laboratory of Western China's Mineral Resources and Geological Engineering Ministry of EducationChang’an UniversityXi'an 710054China

In recent years, the acceleration of urbanization in loess areas has prompted frequent dismantling and reconstruction of old urban areas. Demolition and reconstruction of buildings involve multiple collapses of the foundation. To study microstructure evolution of loess under multiple collapsibility, this paper selects undisturbed loess samples from Guyuan, Northwest China for multiple compression tests. Using nuclear magnetic resonance(NMR) imaging and scanning electron microscopy(SEM) as auxiliary methods, a combination of qualitative and quantitative analyses was used to study the microstructure of loess samples before and after various number of collapses under different pressures. Results show that the loess does undergo multiple collapse under 200 kPa pressure. Pore is an important reason for loess collapse. The initial collapse comes primarily from the compression of macropores and mesopores, and the second collapse comes primarily from mesopore compression. The compression process of loess can be roughly divided into two stages. First, under the action of dissolution and compression, the relative displacement of soil particles occurs. Macropores and mesopores are destroyed first, generating small pores. Second, with increasing pressure and times of collapses, pore compression gradually transforms into small pore compression. During the first collapse, particle aggregates disintegrate due to water and pressure. However, with increasing times of collapses, the contact relationship between particles gradually changes from the point contact to face contact. Loess particles tend to gradually become rounded. The study of the microstructure provides the possibility to further reveal the mechanism of multiple collapsibility of loess.

关键词： Loess Multiple collapse Microstructure Nuclear magnetic resonance Pore volume

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High-throughput 3D reconstruction of stochastic heterogeneous microstructures in energy storage materials

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npj Computational Materials 2019年第1期5卷 1048-1055页

作者： Yanxiang Zhang Mufu Yan Yanhong wan Zhenjun Jiao Yu Chen Fanglin Chen Changrong Xia Meng ni National Key Laboratory for Precision Hot Processing of Metals MIIT Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing TechnologySchool of Materials Science and EngineeringHarbin Institute of Technology150001 HarbinChina CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and EngineeringUniversity of Science and Technology of China230026 HefeiChina College of Science Harbin Institute of Technology518055 ShenzhenChina Center for Innovative Fuel Cell and Battery Technologies School of Materials Science and EngineeringGeorgia Institute of TechnologyGeorgiaGA 30332-0245USA Department of Mechanical Engineering University of South CarolinaCarolinaSC 29205USA Building Energy Research Group Department of Building and Real EstateThe Hong Kong Polytechnic UniversityHung HomKowloonHong Kong

Stochastic heterogeneous microstructures are widely applied in structural and functional materials,playing a crucial role in determining their performance.X-ray tomography and focused ion beam serial sectioning are frequently used methods to reconstruct three-dimensional(3D)microstructures,yet are demanding techniques and are ***,a highthroughput multi-stage 3D reconstruction method via distance correlation functions is developed using a single representatively large-sized 2D micrograph for stochastic microstructures,and verified by X-ray micro-tomography datasets of isotropic and anisotropic solid oxide fuel cell *** method provides an economic,easy-to-use and high-throughput approach for reconstructing stochastic heterogeneous microstructures for energy conversion and storage devices,and can readily be extended to other materials.

关键词： materials stochastic readily

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Dithienopyrrole Based Small Molecule with Low Band Gap for Organic Solar Cells

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Chinese Journal of Chemistry 2015年第8期33卷 852-858页

作者： Miaomiao Li wang ni Huanran Feng Bin Kan Xiangjian wan Yamin Zhang Xuan Yang Yongsheng Chen Key Laboratory for Functional Polymer Materials Centre for Nanoscale Science and TechnologyInstitute of Polymer Chemistry Collaborative Innovation of Chemical Science and Engineering ( Tianjin) College of Chemistry Nankai University Tianjin 300071 China

A low band gap acceptor-donor-acceptor （A-D-A） small molecule donor material, named DR3TDTN, has been designed and synthesized for solution-processed organic solar cells. DR3TDTN shows narrow optical band gap with value of 1.49 eV and broad absorption spectrum from 300 to 820 rim. The HOMO and LUMO energy levels of DR3TDTN are -4.74 and -3.26 eV, respectively. The optimized photovoltaic device based on DR3TDTN：PC71BM blend film shows a power conversion efficiency of 3.03% with an open-circuit voltage of 0.67 V, a short-circuit current of 8.22 mA·cm^-2 and fill factor of 0.55.

关键词： organic solar cells low band gap small molecule HOMO energy level

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Hydroxyl-terminated Polyethylenes Bearing Functional Side Groups:Facile Synthesis and Their Properties

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Chinese Journal of Polymer Science 2021年第8期39卷 994-1003,I0006页

作者： wan-Bin Zhang Jie Luo Yan-Meng wang Xiu-Zhong Zhu Ce Zhang Jing Liu Mei-Le ni Guang-Hua Zhang Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology Shaanxi University of Science&TechnologyXi'an 710021China Shaanxi Key Laboratory of Chemical Additives for Industry College of Chemistry and Chemical EngineeringShaanxi University of Science&TechnologyXi'an 710021China School of Light Industry and Engineering Qi Lu University of Technology(Shandong Academy of Sciences)Jinan 250353China

A series of hydroxyl-terminated polyethylenes(HTPE)bearing various functional side groups(***,ester and butane groups)were synthesized by the combination of ring opening metathesis polymerization(ROMP)and visible light photocatalytic thiol-ene *** products are named as a,w-dihydroxyl-polyllpropionyloxythio)methinetrimethylene](HTPECarboxy),a,w dihydroxy-poly(methylpropionatethio)methinetrimethylene](HTPEeser)and a,wdihydroxyl-poly[(butylthio)methinetrimethylene](HTPEbutane)*** investigation of ROMP indicated that the molecular weight of resultant hydroxy-terminated polybutadiene(HTPB)can be tailored by varying the feed ratios of monomer to chain transfer agent(CTA).The exploration of the photocatalytic thiol-ene reaction between HTPB precursor and methyl-3-mercaptopropionate revealed that blue light as well as oxygen accelerated the reaction.1H-NMR and 13C-NMR results verified all the double bonds in HTPB can be modified,and the main chain of resultant polymer can be considered as ***,relationship between the structure of side groups and the thermal properties of functional PEs was *** the results suggested that the Tg was in the order of HTPEbuanenization of carboxyl side *** can be employed as a macro-initiator for building the triblock copolymer due to the presence of active hydroxyl end *** can serve as a plasticizer for PVC which can enhance the ductilityt of PVC without obviously sacrificing strength.

关键词： Polyethylene Ring-opening metathesis polymerization Thiol-ene reaction Polybutadiene Structure property relationships

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LC-MS法在治疗性寡核苷酸药物检测中的应用

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药物分析杂志 2024年第7期44卷 1113-1124页

作者：李丽丽吴妮席婉琳翟宝祺李皛刘平兰宋洪涛赵芊山东绿叶制药有限公司先进药物递释系统全国重点实验室烟台264003 中国医学科学院北京协和医院临床药理学研究中心疑难重症和罕见病国家重点实验室、国家药品监督管理局药物临床研究与评价重点实验室创新药物临床PK和PD研究北京重点实验室北京100730

治疗性寡核苷酸(oligonucleotides,OGNs)药物是人工化学合成的短单链或双链核酸,长度通常为15~30个碱基对。OGNs作为一种新的治疗药物正在迅速发展,并在各种疾病领域的药物发现和开发中受到越来越多的关注。与欧美相比,除Spinraza(nusin... 详细信息

治疗性寡核苷酸(oligonucleotides,OGNs)药物是人工化学合成的短单链或双链核酸,长度通常为15~30个碱基对。OGNs作为一种新的治疗药物正在迅速发展,并在各种疾病领域的药物发现和开发中受到越来越多的关注。与欧美相比,除Spinraza(nusinersen)作为孤儿药在中国获批上市外,暂无其他OGNs药物在国内上市。国内OGNs药物开发起步较晚,仍然处于发展初期,但由于国内患者群体基数较大,需求较多,未来伴随OGNs药物开发的持续推进,以及国内企业相应技术的逐步成熟,我国OGNs药物市场有望迎来快速发展。OGNs药物由于其独特的理化性质,生物分析方法开发难度大,目前,国内关于OGNs药物定量分析方法的报道还很少。开发一种灵敏可靠的方法来表征生物样品中的OGNs是研究其药代动力学和药效学性质的关键。相对于传统的ELISA法,LC-MS法可以同时定量完整OGNs及其代谢物,特别是高分辨质谱的广泛应用不仅可以提供目标OGNs的定量信息,还可以对代谢物进行鉴定,提供碱基组成、序列结构等信息,目前已成为OGNs定量分析的首选方法。本文主要描述了LC-MS在治疗性OGNs药物检测中的应用,并阐述了其优点和局限性,最后探讨了LC-MS用于检测OGNs的发展趋势,即更低的检测水平和潜在的通用方法。

关键词：治疗性寡核苷酸药物液相色谱质谱联用杂交提取离子对试剂亲水作用液相色谱法高分辨质谱

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深层肌肉刺激仪联合痉挛肌治疗仪对痉挛性偏瘫患者上肢肌张力的影响

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中国伤残医学 2024年第6期32卷 12-15页

作者：沈政锋陈龙万泉倪晓辉田应龙盐城市大丰人民医院康复科江苏盐城224100 盐城市大丰人民医院骨科江苏盐城224100

目的:观察深层肌肉刺激仪(DMS)联合痉挛肌治疗仪对痉挛性偏瘫患者上肢肌张力的影响.方法:选取我院2019年1月-2020年1月收治的60例痉挛性偏瘫患者为研究对象,按照随机数字表法将其分为对照组与观察组,各30例.2组均先使用痉挛肌治疗仪治疗... 详细信息

目的:观察深层肌肉刺激仪(DMS)联合痉挛肌治疗仪对痉挛性偏瘫患者上肢肌张力的影响.方法:选取我院2019年1月-2020年1月收治的60例痉挛性偏瘫患者为研究对象,按照随机数字表法将其分为对照组与观察组,各30例.2组均先使用痉挛肌治疗仪治疗,对照组在上肢肌张力缓解后采用常规康复治疗,观察组在对照组基础上联合DMS治疗,2组均持续治疗4周.比较2组患者的运动功能及上肢肌张力.结果:治疗4周后,观察组上肢肌张力分级分布情况优于对照组;观察组Fugl-Meyer运动功能评定量表评分为(24.06±4.63),高于对照组的(21.47±5.29),组间差异有统计学意义(P<0.05).结论:DMS联合痉挛肌治疗仪能降低痉挛性偏瘫患者上肢肌张力,效果显著.

关键词：痉挛性偏瘫 DMS 痉挛肌治疗仪肌张力

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