首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   4篇
  免费   1篇
  国内免费   9篇
化学   13篇
物理学   1篇
  2021年   1篇
  2018年   1篇
  2017年   1篇
  2014年   1篇
  2013年   3篇
  2011年   1篇
  2009年   1篇
  2005年   4篇
  2004年   1篇
排序方式: 共有14条查询结果,搜索用时 15 毫秒
1.
使用3,3''-硫代二丙酸、4,4''-联吡啶和硝酸锰在水热条件下反应合成了1个锰配合物,即{[Mn(DPA)(4,4''-bipy)]·H2O}n1)(DPA=3,3''-硫代二丙酸,4,4''-bipy=4,4''-联吡啶);然后又利用3,3''-硫代二丙酸、1,3-双(4-吡啶基)丙烷和硝酸铜在水热条件下反应合成了1个铜配合物,即{[Cu(DPA)(bpp)(H2O)]·H2O}n2)(DPA=3,3''-硫代二丙酸,bpp=1,3-双(4-吡啶基)丙烷)。并对它们分别进行了元素分析、红外光谱、热稳定性、X射线粉末衍射和X射线单晶衍射的表征。结果表明:配合物12分别由3,3''-硫代二丙酸配体和不同氮杂环分子以及金属离子构筑,形成了二维层状的结构。氢键和π-π作用进一步将二维结构拓展成三维超分子网络。  相似文献   
2.
使用2,2''-二硫代二苯甲酸和1H-咪唑[4,5-f][1,10]菲咯啉(ip)、硝酸锌在水热条件下发生的原位反应合成了1个锌配合物,即[Zn(C14H8O4S)(ip)(H2O)](1)(C14H8O4S=2,2''-二羧苯基硫醚);然后又利用2,2''-二硫代二苯甲酸和咪唑(im)、硝酸钴在水溶液中合成了1个钴配合物,即{[Co(C14H8O4S2)(im)2]·H2O}n2)(C14H8O4S2=2,2''-二硫代二苯甲酸根),并对它们分别进行了元素分析、红外光谱、热稳定性、荧光光谱、X射线粉末衍射和X射线单晶衍射的表征。结果表明:配合物1由2,2''-二羧苯基硫醚配体连接形成了一个双核的化合物,且锌原子是五配位的三角双锥结构。配合物2由二硫代二苯甲酸配体桥联形成了一个一维链状结构,且钴原子是六配位的八面体结构。  相似文献   
3.
A novel 1-D Cd(Ⅱ) coordination polymer, [Cd(p-BDOA)·2H2O]n(I) ( p-BDOA2-=benzene-1,4-dioxyacetate dianion) has been synthesized and characterized by elemental analysis, IR, PL, TG and X-ray single crystal diffraction. The Crystal crystallizes in monoclinic system, the space group is C2/c, with the crystal cell parameters a=1.175 1(1) nm, b=0.551 0(1) nm, c=1.827 7(2) nm, β=96.14(2)°, and V=1.176 6(3) nm3,, Mr=372.60, R=0.045 9, wR=0.127 9. The Cd(Ⅱ) ion has a trigonal prism coordination configuration that defined by four carboxyl O atoms from two different p-BDOA2- ligands and two water molecules. Adjacent Cd(Ⅱ) ions are linked by carboxylate groups with the bidentate coordination mode, giving rise to a chain structure with the adjacent Cd…Cd distance of 1.526 3(5) nm. Furthermore, such chains are linked by hydrogen bonds to form supramolecular network. The results of PL and TG show that the complex exhibits intense fluorescent emissions and its chain skeleton is thermally stable up to 419 K. CCDC: 220443.  相似文献   
4.
The cobalt(II) complex C20H34O20Co has been synthesized and characterized by elemental analysis, IR, TG and single-crystal X-ray diffraction. The crystal belongs to triclinic, space group P with a = 5.1374(10), b = 10.519(2), c = 12.913(3) (A), α = 86.89(3), β = 79.94(3), γ = 86.74(3)o, V = 685.3(3) (A)3, Z = 1, Mr = 653.40, Dc = 1.583 g/cm3, μ = 0.717 mm-1, F(000) = 341, the final R = 0.0657 and wR = 0.1141 for 1900 observed reflections with I > 2σ(I). The cobalt ion is six-coordinated by two O atoms of different 1,3-bdoaH- ligands and four water molecules, residing in an octahedral environment. The intermolecular hydrogen bonds form a 3-D supramolecular network structure.  相似文献   
5.
A new copper(Ⅱ) coordination polymer, [Cu(p-BDOA)(2,2′-bipy)·H2O]n ( p-BDOA2-=benzene-1,4-dioxyacetate dianion; 2,2′-bipy=2,2′-bipyridine) has been synthesized and characterized by elemental analysis, IR, TG and single crystal X-ray diffraction. The Crystal crystallizes in orthorhombic system, the space group is P212121, with the unit cell parameters a=0.698 4(1) nm, b=1.559 7(3) nm, c=1.750 6(4) nm and V=1.906 8(7) nm3, Mr=461.91, Z=4, R=0.057 5, wR=0.078 3. Each copper(Ⅱ) atom is six-coordinated and displays a distorted square pyramidal geometry with a one-capped base by one very long semicoordinate Cu-O(carboxylate) bond. Adjacent Cu(Ⅱ) ions are bridged by carboxylate groups, resulting in a one-dimensional helical chain. The adjacent Cu…Cu distance within the polymeric chain is 1.348 4 nm. Furthermore, such chains are linked through hydrogen bonds and π-π stacking interactions to form supramolecular network. CCDC: 219234.  相似文献   
6.
合成了1个以粘液酸为配体的锰(Ⅱ)配合物Mn[(muc)(H2O)3]·H2O (1),并通过红外光谱,元素分析,热重分析和X-射线单晶衍射对其进行了表征。配合物1由一维链组成,其三维网络结构可以简化为dia拓扑。初步的电化学实验表明,配合物1在电化学储能上有应用潜力,可以作为氢氧化镍电极的添加剂。  相似文献   
7.
使用3,3''-硫代二丙酸、4,4''-联吡啶和硝酸锰在水热条件下反应合成了1个锰配合物,即{[Mn(DPA)(4,4''-bipy)]·H2O}n1)(DPA=3,3''-硫代二丙酸,4,4''-bipy=4,4''-联吡啶);然后又利用3,3''-硫代二丙酸、1,3-双(4-吡啶基)丙烷和硝酸铜在水热条件下反应合成了1个铜配合物,即{[Cu(DPA)(bpp)(H2O)]·H2O}n2)(DPA=3,3''-硫代二丙酸,bpp=1,3-双(4-吡啶基)丙烷)。并对它们分别进行了元素分析、红外光谱、热稳定性、X射线粉末衍射和X射线单晶衍射的表征。结果表明:配合物12分别由3,3''-硫代二丙酸配体和不同氮杂环分子以及金属离子构筑,形成了二维层状的结构。氢键和π-π作用进一步将二维结构拓展成三维超分子网络。  相似文献   
8.
血迹的光度法测定及其在物证分析中应用   总被引:1,自引:0,他引:1  
在pH 2.4的C-L缓冲介质中人血清蛋白与氯磺酚S反应生成蓝色复合络合物,其吸收峰位于635 nm波长处,摩尔吸光率(ε635)为2.49×106L·mol-1·cm7-1,算得标准工作曲线的线性回归方程为A=3.66×10-1C-0.026,相关系数为1.000,人血清蛋白质量浓度在160 mg·L-1以内呈线性关系.方法的最低检测浓度为0.25 g·L-1,基于以上结果,提出应用上述方法于物证分析中测定血迹中人血清蛋白的含量.  相似文献   
9.
0IntroductionIn recent years many interests have been focusedon the self-assembly of supramolecular architectures,especially on the coordination polymers with rigid or-ganic aromatic carboxylic acid ligands such as tereph-thalate and benzene tetracarboxyl…  相似文献   
10.
A novel coordination polymer, [Cu(m-BDOA)(bipy)·H2O]n (m-BDOA2-=benzene-1,3-dioxyacetate), was synthesized and characterized by elemental analysis, IR spectra, X-ray single crystal structure analysis. Crystallographic data are as follows: orthorhombic, space group Pna21, a=1.606 9(3) nm, b=1.685 9(3) nm, c=0.699 7(1) nm, V=1.8955(7) nm3, Z=4, Dc=1.619 g·cm-3, μ=1.200 mm-1, F(000)=948,R=0.038 1, wR=0.038 6. The copper atom is five-coordinated involving two oxygen atoms of different m-BDOA2- ligand, two nitrogen atoms of 2,2′-bipy ligand and one coordinated water, there is a distorted square pyramidal environment. Two copper atoms are bridged by m-BDOA2- ligand, forming a one-dimensional chain along a axis. The adjacent distance of Cu…Cu atoms is 0.877 3nm. The crystal network was formed by the intermolecular hydrogen bond and π-packing interactions.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号