检索结果-南通市图书馆

Preface to special issue on celebrating the 100th anniversary of Xinjiang University

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第1期17卷 1-4页

作者： dianzeng jia Ruimao Hua Xian-He Bu Yuliang Li State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830017China Department of Chemistry Tsinghua UniversityBeijing 100084China School of Materials Science and Engineering Nankai UniversityTianjin 300350China CAS Key Laboratory of Organic Solids Institute of ChemistryChinese Academy of SciencesBeijing 100190China

Xinjiang University originated from Xinjiang College of Russian Language,Political Science and Law in *** 1935 and 1960,the college was re-organized and re-named as Xinjiang College and Xinjiang University,*** 1978,Xinjiang University was appointed by the State Council as the only national key university in *** 1997,it was designated as one of the first batch of key construction universities in the“211 Project”of *** 2000,Xinjiang University was rebuilt through merging with Xinjiang Institute of Technology.

关键词： Xinjiang anniversary originated

Three novel photoisomeric compounds of the 4-acyl pyrazolone derivants: Crystal structures and substituent effects on photo-isomerism in solid state

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2008年第7期51卷 661-668页

作者： WANG JunHua LIU Lang LIU GuangFei GUO JiXi jia dianzeng Institute of Applied Chemistry Xinjiang UniversityUrumqi 830046China

Three new photoisomeric compounds: 1,3-diphenyl-4-benzal-5-pyrazolone 4-methylthiosemicarbazone (DPBP-MTSC), 1,3-diphenyl-4-(4′-methylbenzal)-5-pyrazolone 4-methylthiosemicarbazone (DP4MBP- MTSC), and 1,3-diphenyl-4-(4′-bromobenzal)-5-pyrazolone 4-methylthiosemicarbazone (DP4BrBP-MTSC) were synthesized by direct condensation of pyrazolones and 4-methylthiosemicarbazone. Their struc- tures were confirmed using 1H NMR, IR, elemental analyses, and X-ray crystallographic analyses. The photoisomeric properties in the solid state were studied under UV light irradiation and the photo- isomerization phenomena were interpreted by the double proton-transfer mechanism. Moreover, the effects of different substituent groups at the 4-position of the benzal in the three compounds on the photoisomeric properties were discussed.

关键词： photoisomerization pyrazolone proton-transfer substitute effects

Synthesis, Structure and Properties of Two Photochromic Compounds Containing A Pyrazolone-ring

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2000年第2期16卷 116-121页

作者： TANG Xincun jia dianzeng ZHANG Xiaogang XIA Xi ZHOU Zhongyuan 新疆大学新疆乌鲁木齐 830 0 46 中科院成都有机化学所四川成都 6 1 0 0 1

Two photochromic compounds with the pyrazolonering as the photochromic functional structure, 2(1phenyl3methyl4benzoformylpyrazolone5)thiosemicarbazone(PMBPTSC) and 2(1phenyl3methyl4benzoformylpyrazolone5)smethylthiosemicarbazone(PMBPMTSC), were synthesized and characterized by elemental analysis, MS, IR spectra, NMR spectra. The crystal structure of the photocolored product of PMBPTSC was determined by single crystal XRD analysis. The results show that the photochromic phenomenon is due to the photoisomerization from enol form to keto form. Their photochromic properties were studied by powderUV reflectance spectra under the irradiation of 200—380 nm light. The firstorder rate constants of the photocoloring reaction were found to be 780×10 -3 s -1 for compound 1A and 103×10 -3 s -1 for compound 2A.

关键词： Synthesis Crystal structure Pyrazolone-ring Photochromic compound

Ultrathin oxygen-containing graphdiyne wrapping CoP for enhanced electrocatalytic hydrogen generation

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第4期16卷 5073-5079页

作者： Yan Lv Xueyan Wu Hao Li Hongbo Zhang jiaxin Li Zhiyou Zhou Jixi Guo dianzeng jia State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi830017China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen 361005China

Graphdiyne(GDY)is fascinating in the construction of efficient and stable catalysts,but their performance is still somewhat restricted due to GDY’s thicker layers,as well as hydrophobic and relatively chemically inert ***,via oxidationexfoliation-reduction strategy,the self-supported electrode material of CoP nanosheets with ultrathin oxygen-containing GDY wrapping(CoP@RGDYO)for effective HER is *** wrapping of ultrathin oxygen-containing GDY promotes charge transfer,improves the surface property,and enhances the acid and alkali resistance as well as the structural stability of the *** a result,CoP@RGDYO shows enhanced activity and stability in both acidic and alkaline ***,it exhibits a low overpotential of 86 mV and exceptional stability under a 14000-cycle cyclic voltammetry scanning in alkaline *** work provides new ideas for the design of GDY hybrid materials and the preparation of high-efficiency catalysts.

关键词： graphdiyne chainmail catalyst hydrophilicity stability hydrogen generation

1-苯基-3-甲基-4-(6-氢-4-氨基-5-硫杂-2,3-吡嗪)吡唑啉酮光致变色超分子化合物的合成、结构与性能

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

化学学报 2002年第3期60卷 493-498页

作者：刘浪贾殿赠郁开北新疆大学应用化学研究所乌鲁木齐830046 中国科学院成都有机化学研究所成都610041

通过 1 苯基 3 甲基 4 氯乙酰基吡唑啉酮 5 (PMCP)和氨基硫脲 (TSC)缩合 ,形成了一种含NNS六元杂环的光致变色化合物 (PMCP TSC) .利用元素分析 ,MS ,1HNMR ,IR和UV光谱进行了表征 .通过紫外可见光谱对它的光致变色性质进行了研究 ... 详细信息

通过 1 苯基 3 甲基 4 氯乙酰基吡唑啉酮 5 (PMCP)和氨基硫脲 (TSC)缩合 ,形成了一种含NNS六元杂环的光致变色化合物 (PMCP TSC) .利用元素分析 ,MS ,1HNMR ,IR和UV光谱进行了表征 .通过紫外可见光谱对它的光致变色性质进行了研究 ,测出了光致变色反应的动力学常数 .并用X射线单晶衍射仪测定了PMCP TSC变色后的晶体结构 ,该晶体属单斜晶系 ,具有P2 1/c空间群 ,a =0 .10 5 10 (2 )nm ,b =0 .15 0 6 1(3)nm ,c =0 .99370 (10 )nm ,β =10 7.890 (10 )° ,V =1.496 9(4 )nm3 ,Z =4,Dc=1.417Mg/m3 ,μ =0 .2 32mm-1,F(0 0 0 ) =6 72 ,R =0 .0 334 ,wR =0 .0 896 .结构分析表明 :其光致变色现象是由于它在溶剂与光的共同作用下发生了从醇式到酮式的异构化 .同时该化合物经分子间氢键形成二聚体 ,又通过甲醇与本体分子之间的氢键使化合物形成具有三维网络结构的超分子化合物 .

关键词：光致变色吡唑啉酮超分子化合物合成晶体结构氨基硫脲

MOF-derived Co-N/C as effcient bifunctional electrocatalyst for the oxygen reduction and oxygen evolution reactions

在线全文

学校读者我要写书评

暂无评论

MOF-derived Co-N/C as effcient bifunctional electrocatalyst ...

4-(2′-羟基苯甲酰肼)苯亚甲基/亚乙基-5-甲基-2-苯基-2,4-二氢-吡唑啉酮-3超分子化合物的合成与晶体结构

中国化学会第八届全国配位化学会议

作者： Jinjin Ban Guancheng Xu dianzeng jia Key Laboratory of Energy Materials Chemistry Ministry of Education

In recent years,increasing global energy demand and decreasing fossil fuel resources require the renewable and environment friendly technologies to ease the current energy *** oxygen reduction/evolution reactions(ORR/OER)are two important electrochemical processes in many energy conversion and storage *** for the oxygen electrode reactions,exploiting high efficiency and stable catalysts seems to be a paramount ***,we synthesized porous cobalt-based nitrogen doped carbon materials(Co-N/Cs)via facile carbonization of a cobalt-based metal-organic framework with different temperature(t=600,700,800 C).The obtained Co-N/Cs inherited the octahedron shape from the MOF precursor,which possess excellent activities as bifunctional electrocatalysts for the ORR and OER in 0.1 M *** to other Co-N/Cs,the Co-N/C-700 hold the best electrocatalytic *** it used as electrocatalysts for the ORR,the Co-N/C-700 offers a higher onset potential of 0.90V ***,excellent stability,and a four-electron *** OER catalytic activity,Co-N/C-700catalyst possesses a lower potential of 1.63 V with the current density of 10 mA·*** addition,the as-prepared Co-N/C-700 affords a low reversible overvoltage(bifunctional performance parameter)of 0.904 V between ORR and *** study provides a novel avenue for the application of stable metal-based nitrogen doped carbon materials as highly efficient electrocatalysts for the ORR and OER.

关键词： MOF-derived Co-N/C bifunctional electrocatalyst oxygen reduction reaction oxygen evolution reaction

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

化学学报 2003年第6期61卷 893-900页

作者：刘浪吉亚丽贾殿赠郁开北新疆大学应用化学研究所乌鲁木齐830046 中国科学院成都分院分析测试中心成都610041

报道了 4 (2′ 羟基苯甲酰肼 )苯亚甲基 5 甲基 2 苯基 2 ,4 二氢 -吡唑啉酮 3 (B1)和 4 (2′ 羟基苯甲酰肼 )亚乙基 5 甲基 2 苯基 2 ,4 二氢 -吡唑啉酮 3 (B2 )的合成、表征及晶体结构分析 ,B1晶体属单斜晶系 ,C2 /c空间... 详细信息

报道了 4 (2′ 羟基苯甲酰肼 )苯亚甲基 5 甲基 2 苯基 2 ,4 二氢 -吡唑啉酮 3 (B1)和 4 (2′ 羟基苯甲酰肼 )亚乙基 5 甲基 2 苯基 2 ,4 二氢 -吡唑啉酮 3 (B2 )的合成、表征及晶体结构分析 ,B1晶体属单斜晶系 ,C2 /c空间群 ,所得晶胞参数为 :a =1.42 0 1(2 )nm ,b =1.65 5 42 (2 )nm ,c =1.845 5 (3 )nm ,β =10 1.3 2 (1)° ,V =4.2 5 41(10 )nm3 ,Z =8,Dc=1.3 44g/cm3 ,μ =0 .0 94mm-1,F(0 0 0 ) =180 8,R =0 .0 44 2 ,wR =0 .10 3 7.该化合物由水分子通过氢键连接成沿ac面无限延伸的二维网络结构的超分子 .B2 晶体属三斜晶系 ,P 1空间群 ,a =1.2 12 0 (2 )nm ,b =1.2 2 2 3 (2 )nm ,c =1.415 9(3 )nm ,α =70 .3 8(1)° ,β =74.91(1)° ,γ =63 .64 (1)° ,V =1.75 49(5 )nm3 ,Z =4,Dc=1.3 2 6g/cm3 ,μ =0 .0 92mm-1,F(0 0 0 ) =73 6,R =0 0 43 6,wR =0 .10 76.此化合物通过分子间氢键形成沿a轴无限延伸的一维链状结构的超分子。

关键词： 4-(2′-羟基苯甲酰肼)苯亚甲基-5-甲基-2-苯基-2,4-二氢-吡唑啉酮-3 超分子化合物合成晶体结构 4-(2′-羟基苯甲酰肼)亚乙基-5-甲基-2-苯基-2,4-二氢-吡唑啉酮-3 氢键

柔性钛箔上生长的自支撑TiO2@NiCo2S4阵列复合材料用作高性能非对称超级电容器电极（英文）

在线全文

学校读者我要写书评

暂无评论

材料导报 2020年第1期34卷 187-195页

作者：李寒孙志鹏贾殿赠新疆大学应用化学研究所教育部能源材料化学重点实验室乌鲁木齐830046 广东工业大学材料与能源学院广州510006

近年来,随着可穿戴电子技术的出现,制作出质量轻、灵活性强的电子设备也越来越受到人们的重视,相应具有可穿戴功能的高电化学性能的储能设备也备受关注。其中,超级电容器具有循环寿命长、充放电速度快、功率密度高等优点,是一种很有前... 详细信息

近年来,随着可穿戴电子技术的出现,制作出质量轻、灵活性强的电子设备也越来越受到人们的重视,相应具有可穿戴功能的高电化学性能的储能设备也备受关注。其中,超级电容器具有循环寿命长、充放电速度快、功率密度高等优点,是一种很有前途的储能设备。因此,柔性超级电容器的设计和生产被认为是满足先进柔性电子设备需求的最有前途的策略之一。鉴于电极材料是影响超级电容器的性能和生产成本的关键因素,因此开发高性能和低成本的电极材料是超级电容器研究的重要内容。在众多研究的电极材料中,双金属化合物因具有较高的理论比电容、较低的成本,对环境相对友好,耐碱腐蚀等优势而引起研究人员的广泛关注。其中,金属硫化物中硫钴镍是一种典型的双金属硫化物。硫钴镍具有理论容量高、电负性较低、电化学活性高、资源丰富易得、无毒、易制备等特点,因此被广泛用于超级电容器的电极材料。硫钴镍虽然具有较高的理论容量,但目前仍面临以下几个严重问题:(1)硫钴镍导电性差,实际电化学比容量低于理论容量;(2)硫钴镍在充放电过程中存在严重的体积膨胀,使得电容器结构被破坏进而造成电容器循环性能的快速衰减。目前的解决办法一般是通过将硫钴镍与各种碳材料、金属氧化物及导电聚合物复合,改善材料的结构、形貌和导电性,以此提高材料的电化学性能。硫钴镍与金属氧化物、硫钴镍与碳材料复合的电极材料在制成超级电容器的电极极片时需要添加导电剂和粘结剂,这不仅增加了电极的成本,而且也使制作环节变得复杂,更重要的是活性物质的外露面积也会因为粘结剂的使用而减小。现在许多研究将导电活性物质直接生长在集流体上形成自支撑结构,这种结构形式既简化了超级电容器电极的制作流程,又提高了电容器的电化学性能。本研究以Ti片为基底,采用分步水热法先在Ti片表面生长TiO2纳米带阵列,然后在其上包覆生长NiCo2S4纳米片,得到NiCo2S4纳米片包覆TiO2纳米带的核/壳阵列结构。将TiO2@NiCo2S4作为超级电容器无粘结剂和导电剂的电极。三电极测试结果表明:1 A·g-1时TiO2@NiCo2S4电极的比电容达到1 300 F·g-1。此外,将煤基多孔碳(CPC)作为负极,TiO2@NiCo2S4作为正极,组装成了TiO2@NiCo2S4//煤基多孔碳(CPC)不对称超级电容器(ASC)。电化学测试结果表明:TiO2@NiCo2S4//CPC不仅具有较高的能量密度和功率密度(在400 W·kg-1时为41.6 Wh·kg-1),而且具有良好的循环稳定性(在4 A·g-1下循环5 000次后,电容保持率大于80%)。这是由于采用多级阵列式结构的复合电极具有以下优势:(1)比表面积大,增大了活性物质和电解液的接触面积;(2)孔道丰富,减少了电解液离子迁移的距离;(3)避免了使用传统电极制作过程中导电剂和粘结剂,减少了生产成本、缩短了加工时间。这种交织的三维(3D)网络结构和柔性衬底的设计为获得高性能柔性衬底电极材料提供了新方法。

关键词： NiCo2S4 TiO2 阵列结构柔性衬底自支撑电极不对称超级电容器

在线全文

学校读者我要写书评

暂无评论

含吡唑啉酮酰肼类衍生物的合成与结构

化学学报 2001年第9期59卷 1495-1501页

作者：刘浪贾殿赠乔永民郁开北新疆大学应用化学研究所中国科学院成都分院分析测试中心

报道了PMBP-NTH(NTH为烟酰肼)与PMBP-PAH(PAH为对甲氧基苯甲酰肼)的合成、表征和晶体结构分析,PMBP-NTH晶体属三斜晶系,具有P1空间群,a=O.9024(2)nm,b=1.0953(2)nm,c=1.1635(2)nm,α=67.070(10)°,β=68.200(10)°,y=84.770(10)°,V=0.9816(3)nm3,Z=2,Dc=1.345g/cm3,μ=0.090 mm-1,F(000)=416,R=0.0363,ωR=***-PAH属单斜晶系,具有P21/c空间群,a=1.2715(4)nm,b=0.91710(10)nm,c=1.8979(3)nm,β=106.890(10)°,V=2.1177(8)nm3,Z=4,Dc=1.338g/cm3,μ=0.090 mim-1,F(000)=896,R=O.0414,ωR=0.0972.这两个化合物在分子内都形成了大的共轭体系,由于分子间氢键力的作用,又使它们在晶体中以二聚体的形式存在.

关键词： 1-苯基-3-甲基-4-苯甲酰基-吡唑啉酮-5 烟酰肼对甲氧基苯甲酰肼晶体结构合成光致变色