English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 49074/83178 (59%)
造訪人次 : 6967513      線上人數 : 65
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/24903

    題名: 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
    貢獻者: 淡江大學化學學系
    關鍵詞: Ferricyanide reduction;Ferrocyanide;trans-1,2-Diaminocyclohexane;Square grid;Cyanometallate;Crystal engineering
    日期: 2006-06-19
    上傳時間: 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
    顯示於類別:[化學學系暨研究所] 期刊論文


    檔案 描述 大小格式瀏覽次數



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