English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 63185/95884 (66%)
造访人次 : 4564002      在线人数 : 291
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻

    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/24903

    题名: Crystal engineering and magnetic properties of a 2D cyano-bridged NiIIFeII network formed through reduction of ferricyanide
    作者: Nayak, Malabika;Kundu, Parimal;Lemoine, Pascale;Koner, Rajesh;Wei, Ho-hsiang;魏和祥;Mohanta, Sasankasekhar
    贡献者: 淡江大學化學學系
    关键词: Ferricyanide reduction;Ferrocyanide;trans-1,2-Diaminocyclohexane;Square grid;Cyanometallate;Crystal engineering
    日期: 2006-06-19
    上传时间: 2009-12-01
    出版者: Elsevier
    摘要: Reaction of potassium ferricyanide with a mixture of nickel(II) chloride hexahydrate and trans-1,2-diaminocyclohexane (L) produces both a ferrocyanide ([NiIIL2]2[FeII(CN)6] · 5H2O (1)) and a ferricyanide ([NiII(L)2]3[FeIII(CN)6]2 · 2H2O (2)) compound. Clearly, the formation of 1 is accompanied by the reduction of ferricyanide to ferrocyanide. Interestingly, the relative amounts of the formation of 1 and 2 depends on the nickel(II):diamine ratio and the volume of the reaction mixture. It has been established from spectrophotometric titration that trans-1,2-diaminocyclohexane is responsible for the reduction of [Fe(CN)6]3− to [Fe(CN)6]4−. The ferrocyanide analogue, 1, can also be prepared by mixing potassium ferrocyanide with the nickel(II)-diamine solution. Among the six cyanides of each hexacyanoferrate(II), four coordinate to four different nickel(II) centers to form cyano-bridged two-dimensional square grids. The remaining two cyanides form strong hydrogen bonds with two hydrogens of one water of crystallization to result in squares, which can be considered as appended to the two-dimensional grids. The hydrogen bonds involving the hydrogens of amine groups of one 2D grid and the oxygens forming the appended squares of another 2D grid generate the third dimension of the structure. Variable-temperature (2–300 K) magnetic susceptibility measurements reveal that the nickel(II) centers in 1 are practically non-correlated.
    關聯: polyhedron 25(9), pp.2007-2014
    DOI: 10.1016/j.poly.2005.12.024
    显示于类别:[化學學系暨研究所] 期刊論文


    档案 描述 大小格式浏览次数
    Crystal engineering and magnetic properties of a 2D cyano-bridged NiIIFeII network formed through reduction of ferricyanide.pdf449KbAdobe PDF2检视/开启



    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回馈