检索结果-南通市图书馆

Chemical Research in Chinese Universities 2007年第1期23卷 105-108页

作者： WANG Qing-wei LI Xiu-mei gao guang gang Department of Chemistry Jilin Normal University Siping 136000 P. R. China Department of Chemistry Tonghua Teachers College Tonghua 134002 P.R. China

The rational design and synthesis of metal-directed supramolecular framework compounds have received much attention in coordination chemistry because of their potential applications in catalysis, molecular selection, nonlinear optics, ion exchange, and microelectronics. Many high-dimensional coordination complexes have been designed and prepared through molecular self-assembly processes. The open metal organic framework can be produced via two kinds of interactions, i. e. , coordinate covalent bonds and weaker intermolecular forces. For this reason, the most efficient means to synthesize these compounds is to establish possible connections among different units.

关键词： Hydrothermal synthesis Crystal structure Supramoleeular network Mixed ligand

Synthesis and Crystal Structure of a Novel Tetravanadate Modified by Chiral Racemoid Zirconium Complex

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2006年第8期25卷 979-984页

作者： WANG Qing-Wei SHI Lin-Fang gao guang-gang LI Chuan-Bi EAN Liang Chemistry College Jilin Normal University Siping 136000 China Chemistry College Jilin University Changchun 130000 China

[Zr（phen）4（H2O）4O2（V4O12）]（phen）2 1 （phen = 1,10-phenanthroline） was synthesized under hydrothermal condition. The crystal of 1 belongs to triclinic, space group P1^- with a = 10.6334（8）, b = 11.9201（8）, c = 14.6505（10） A, α = 69.9980（10）, β = 84.9240（10）, γ = 84-1300（10）°, V = 1733.0（2） A^3, Z = 1, Mr = 1672.27, Dc = 1.602 g/cm^3, C72H56N12O18V4Zr, F（000） = 848, μ（MoKa） = 0.747 mm^-1, S = 0.957, R = 0.0504 and wR = 0.1173 for 4011 observed reflections （1 〉 20（I））. The crystal structure of 1 could be discussed in terms of {Zr（phen）2（H2O）2O2}, un-coordinated 1,10-phenanthroline molecules and { V4O12 } unit. In { Zr（phen）2（H2O）2O2 }, the coordination geometry of zirconium is a dodecahedron, but {V4O12} unit is constructed from four apex-sharing {VO4} tetrahedra. Furthermore, {V4O12} links with two {Zr（phen）2（H2O）2O2} units via two bridging oxygen atoms. Interestingly, the two {Zr（phen）2（H2O）2O2} units display D- and L-enantiomers, respectively, upon which the whole molecule represents a racemoid configuration.

关键词： crystal structure V-O tetrahedron 1,10-phenanthroline

链状铜配合物[Cu(bipy)_2Cl]_2Cl_2·nH_2O(bipy=2,2′-联吡啶)水热合成

在线全文

学校读者我要写书评

暂无评论

东北师大学报（自然科学版） 2005年第2期37卷 137-140页

作者：王文举高广刚许林东北师范大学化学学院

　利用水热合成方法制备了一种新颖的由π-π堆积形成的链状二价铜配合物[Cu(bipy)2Cl]2Cl2·nH2O(bipy=2,2'-联吡啶),并用单晶衍射仪测定了其晶体结构,在2K～300K之间测定其磁化率.结果表明:该化合物为单斜晶系,P2/c空间群,a=1.2328(3)... 详细信息

　利用水热合成方法制备了一种新颖的由π-π堆积形成的链状二价铜配合物[Cu(bipy)2Cl]2Cl2·nH2O(bipy=2,2'-联吡啶),并用单晶衍射仪测定了其晶体结构,在2K～300K之间测定其磁化率.结果表明:该化合物为单斜晶系,P2/c空间群,a=1.2328(3)nm,b=1.4781(3)nm,c=1.4311(3)nm,α=90°,β=108.51(3)°,γ=90°,V=2.4730(9)nm3;8K～298K之间标题化合物呈现明显的铁磁性耦合相互作用,在2K～8K范围内却呈现出反铁磁性相互作用的特征.元素分析及红外光谱进一步佐证了化合物的结构.

关键词： π-π堆积单晶磁性

在线全文

学校读者我要写书评

暂无评论

碳黑对紫外光交联聚乙烯材料的屏蔽作用

塑料工业 2015年第2期43卷 86-88页

作者：刘岩鲍文波高广刚祁鑫张贵黑龙江省润特科技有限公司黑龙江佳木斯154014 佳木斯大学黑龙江佳木斯154007

通过测定凝胶含量和光强检测薄膜的吸光度,研究碳黑含量对紫外光交联聚乙烯材料的屏蔽作用。结果表明,碳黑具有显著的屏蔽作用,不能应用于生产黑色紫外光交联聚乙烯材料。

关键词：吸光度碳黑紫外光交联聚乙烯屏蔽作用

紫外光交联聚乙烯电缆绝缘材料的膨胀阻燃研究

在线全文

学校读者我要写书评

暂无评论

塑料工业 2012年第9期40卷 100-103页

作者：刘红季洋姜国发高广刚赵洪哈尔滨理工大学黑龙江哈尔滨150080 黑龙江沃尔德电缆有限公司黑龙江佳木斯154004

采用大分子成炭发泡剂及改性的聚磷酸铵制备出新型的无卤高效膨胀阻燃剂,将该类阻燃剂成功应用于可光交联的聚乙烯电缆材料中,赋予聚乙烯电缆材料良好的力学性能、阻燃性能及电性能。复合材料的各项物理机械性能及阻燃性能指标,完全符... 详细信息

采用大分子成炭发泡剂及改性的聚磷酸铵制备出新型的无卤高效膨胀阻燃剂,将该类阻燃剂成功应用于可光交联的聚乙烯电缆材料中,赋予聚乙烯电缆材料良好的力学性能、阻燃性能及电性能。复合材料的各项物理机械性能及阻燃性能指标,完全符合国家标准GB/T 12706-2008中对电力电缆交联聚乙烯绝缘材料的各项指标要求。

关键词：膨胀阻燃聚乙烯光交联绝缘材料

Bulging Performance and Quality Control of Aluminum Alloy Tailor-welded Overlapping Sheets Based on Interface Friction

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 258-264页

作者： gao Tiejun gao Bowen LI Weijie ZHANG Jiabin College of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China Shenyang Aerospace Xinguang Group Co.L td. Shenyang 110043China

In order to solve the problem of poor formability caused by different materials and properties in the process of tailor-welded sheets forming,a forming method was proposed to change the stress state of tailor-welded sheets by covering the tailor-welded sheets with better plastic properties overlapping *** the same time,the interface friction effect between the overlapping and tailor-welded sheets was utilized to control the stress magnitude and further improve the formability and quality of the tailor-welded *** this work,the bulging process of the tailor-welded overlapping sheets was taken as the research *** alloy tailor-welded overlapping sheets bulging specimens were studied by a combination of finite element analysis and experimental *** results show that the appropriate use of interface friction between tailor-welded and overlapping sheets can improve the formability of tailor-welded sheets and control the flow of weld seam to improve the forming *** increasing the interface friction coefficient on the side of tailor-welded sheets with higher strength and decreasing that on the side of tailor-welded sheets with lower strength,the deformation of the tailor-welded sheets are more uniform,the offset of the weld seam is minimal,the limit bulging height is maximal,and the forming quality is optimal.

关键词： tailor-welded sheets overlapping sheet bulging interface friction weld seam stress

新型二维层状配合物[Cd_4(2,2-′dipha)_2(nicotinate)_4]_n的合成及晶体结构

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

分子科学学报 2009年第3期25卷 209-212页

作者：关莹王庆伟高广刚刘博浙江林学院理学院浙江临安311300 吉林师范大学化学学院吉林四平136000

利用水热法合成了一种新型的二维金属有机配合物[Cd4(dpa)2(HL)4]n[dpa=2,2′-联苯二甲酸,HL=烟酸],并通过X-射线单晶衍射、元素分析、红外光谱等手段对其结构进行了表征.结果表明:[Cd4(dpa)2(HL)4]n属于三斜晶系,空间群Pī,晶胞参数a=0... 详细信息

利用水热法合成了一种新型的二维金属有机配合物[Cd4(dpa)2(HL)4]n[dpa=2,2′-联苯二甲酸,HL=烟酸],并通过X-射线单晶衍射、元素分析、红外光谱等手段对其结构进行了表征.结果表明:[Cd4(dpa)2(HL)4]n属于三斜晶系,空间群Pī,晶胞参数a=0.822 2(2)nm,b=1.497 6(3)nm,c=1.981 7(5)nm,α=80.245(4)°,β=83.885(4)°,γ=89.972(4)°,V=2.390 9(10)nm3,Z=2,R1=0.071 6,wR2=0.157 3,Mr=1 415.39,Dc=1.966 g/cm3.配合物中Cd(Ⅱ)均为六配位,Cd与5个O原子和1个烟酸中的H原子配位形成扭曲八面体构型.金属离子Cd(Ⅱ)由联苯酸连成一条无限一维链,相邻的两条链由烟酸连接构成二维层状结构.

关键词： 2,2’-联苯二甲酸烟酸配合物晶体结构

固体超强酸改性分子筛对膨胀阻燃体聚丙烯材料的性能影响

在线全文

学校读者我要写书评

暂无评论

塑料 2011年第6期40卷 74-78页

作者：高苏亮季洋张惠鲍文波高广刚李斌黑龙江省润特科技有限公司研发中心黑龙江佳木斯154004 东北林业大学理学院黑龙江省阻燃材料分子设计与制备重点实验室黑龙江哈尔滨150040

以固体超强酸改性分子筛作为协效剂,与RTB-IFR膨胀阻燃剂(未含协效剂成分)复配,用于PP的阻燃。研究添加改性分子筛的RTB-IFR对PP的阻燃性能、力学性能及热降解行为的影响。实验表明:对4A分子筛进行改性后,添加到RTB-IFR中,材料的阻燃性... 详细信息

以固体超强酸改性分子筛作为协效剂,与RTB-IFR膨胀阻燃剂(未含协效剂成分)复配,用于PP的阻燃。研究添加改性分子筛的RTB-IFR对PP的阻燃性能、力学性能及热降解行为的影响。实验表明:对4A分子筛进行改性后,添加到RTB-IFR中,材料的阻燃性能没有明显提高,对13X分子筛进行改性,添加到RTB-IFR中,材料的阻燃性能有所提高,氧指数比没改性时提高了1%左右,1.6 mm样条的垂直燃烧也由UL94V-1级提高到UL94V-0级。对H-BETA分子筛进行改性,添加到RTB-IFR中,阻燃性能也有一定提高,其中负载镍的固体酸的H-BETA分子筛,氧指数达到35.0%,垂直燃烧通过UL94V-0级。力学性能测试表明:改性分子筛对材料的力学性能影响不大。TG测试表明:加入改性分子筛的阻燃剂后,改变了RTB-IFR和PP/RTB-IFR的热降解过程,提高了高温时成炭量和炭层的热稳定性和热绝缘性,使PP/RTB-IFR的阻燃性能得到提高。

关键词：膨胀阻燃剂聚丙烯分子筛固体超强酸改性

Based on non-targeted metabolomics for differential components screening of Rosae Chinensis Flos and Rosae Rugosae Flos and their quality evaluation

在线全文

学校读者我要写书评

暂无评论

Traditional Medicine Research 2025年第2期10卷 1-15页

作者： Xu Liang Ni-Hui Zhang Zhi-Lai Zhan guang-Lu Chang Yan gao Xia Li Wen-Yuan gao School of Pharmaceutical Science and Technology Faculty of MedicineTianjin UniversityTianjin 300193China State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs China Academy of Chinese Medical SciencesBeijing 100700China Key Laboratory of Modern Chinese Medicine Resources Research Enterprises Tianjin 300402China

Background:Rosa chinensis *** Rosa rugosa *** not only of ornamental value,but also edible flowers and the flower buds have been listed in the Chinese Pharmacopoeia as traditional *** two plants have some differences in efficacy,but the flower buds are easily confused for similar *** addition,large-scale cultivation of ornamental rose flowers may lead to a decrease in the effective components of medicinal ***,it is necessary to study the chemical composition and make quality evaluation of Rosae Chinensis Flos(Yueji)and Rosae Rugosae Flos(Meigui).Methods:In this study,40 batches of samples including Meigui and Yueji from different regions in China were collected to establish high-performance liquid chromatography ***,the fingerprints data was analyzed using principal component analysis,hierarchical cluster analysis,and partial least squares discriminant analysis analysis chemometrics to obtain information on intergroup differences,and non-targeted metabolomic techniques were applied to identify and compare chemical compositions of samples which were chosen from groups with large *** compounds were screened by orthogonal partial least-squares discriminant analysis and S-plot,and finally multi-component quantification was performed to comprehensively evaluate the quality of Yueji and ***:The similarity between the fingerprints of 40 batches roses and the reference print R was 0.73 to 0.93,indicating that there were similarities and differences between the *** principal component analysis and hierarchical cluster analysis of fingerprints data,the samples from different origins and varieties were intuitively divided into four *** least-squares discriminant analysis analysis showed that Meigui and Yueji cluster into two categories and the model was reliable.A total of 89 compounds were identified by high resolution mass spectrometry,mainly were flavonoids and flavon

关键词： Rosa chinensis Jacq. Rosa rugosa Thunb. metabolomics chemometrics multiple component quantification quality evaluation

一种新型的负极材料助力高倍率及长寿命的锂/钠储存

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

新型炭材料（中英文） 2024年第2期39卷 308-320页

作者：张春晖张家源湛杰杨于健范林林杨安平刘红高广刚济南大学材料科学与工程学院金属纳米团簇光/电催化与传感协同创新中心山东济南250022

在锂离子电池(LIBs)和钠离子电池(SIBs)中,设计同时适用的负极材料,使其具有高倍率性能和超长循环寿命是亟需解决的工作。本文采用静电纺丝技术和硫化工程技术成功制备了一种均匀分布在N,S-掺杂炭纳米纤维上的MoO_(2)/MoS_(2)异质结构(M... 详细信息

在锂离子电池(LIBs)和钠离子电池(SIBs)中,设计同时适用的负极材料,使其具有高倍率性能和超长循环寿命是亟需解决的工作。本文采用静电纺丝技术和硫化工程技术成功制备了一种均匀分布在N,S-掺杂炭纳米纤维上的MoO_(2)/MoS_(2)异质结构(MoO_(2)/MoS_(2)@NSC)。其中一维炭骨架作为导电框架可缩短Li^(+)/Na^(+)的扩散途径;炭纳米纤维中N/S杂原子的掺杂引入了丰富的活性位点,显著增强了离子扩散动力学。此外,在MoO_(2)相中通过原位形成的MoS_(2)纳米片强化了异质界面,MoO_(2)和MoS_(2)之间异质界面的构建使得Li^(+)/Na^(+)的快速传输成为实现高效储能的关键。因此,作为LIBs负极材料时,MoO_(2)/MoS_(2)@NSC电极在5.0 A g^(−1)的电流密度下循环2000圈后,仍具有640 mAh g^(−1)的优异放电比容量,每圈的容量衰减率仅为0.002%;在10.0 A g^(−1)的高电流密度下可达到614 mAh g^(−1)的放电比容量。对于SIBs,在2.0 A g^(−1)的电流密度下循环2000圈后其可逆容量仍能达到242 mAh g^(−1)。本工作采用一种新颖的界面调控策略来合理地设计负极材料,从而提高Li^(+)/Na^(+)储存动力学,实现超长寿命的循环性能。

关键词：多酸衍生物异质结构高倍率性能锂离子电池钠离子电池