淡江大學機構典藏:Item 987654321/32697
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    题名: 氰基架橋釓-鐵(Ⅲ)錯合物之合成、晶體構造與磁性之研究
    其它题名: Synthesis, crystal structures and magnetic properties of cyano-bridged gadolinium-iron(Ⅲ) complexes
    作者: 劉欣怡;Liu, Hsin-i
    贡献者: 淡江大學化學學系碩士班
    魏和祥;Wei, Ho-hsiang
    关键词: 鑭系金屬錯合物;氰基架橋錯合物;磁性性質;晶體結構;Lanthanide Complexes;Cyano-Bridged Complexes;Magnetic Properties;crystal structure
    日期: 2008
    上传时间: 2010-01-11 02:34:56 (UTC+8)
    摘要: 本論文主要合成釓金屬的普魯士藍錯合物,得到四個以CN為架橋基4f-3d雙金屬錯合物及其單晶結構,
    [Gd(DMF)3(o-phen)(H2O)2Fe(CN)6]2•H2O(1)
    [Gd(DMF)3(bpy)(H2O)Fe(CN)6]2•2H2O(2)
    [Gd(DMF)2(o-phen)(H2O)2Fe(CN)6]n•3nH2O•0.5n(DMF) (3)
    [Gd(H2O)2Fe(CN)6]•2H2O (4)
    其中錯合物1, 2, 3和4分別為異雙核,四核,一維及三維結構。在溫度範圍(2 - 300 K)測得這些透過CN架橋連接釓金屬與鐵(Ⅲ)錯合物的變溫磁化率,錯合物1, 2和3皆為反鐵磁性偶合作用,錯合物4在低溫下存在相轉移(phase – transition),並在T = 6 K和16 K下測量磁化強度(M) (H = 0 - 5 T),T = 16 K之實驗曲線符合基態總自旋量子數S = 3之理論曲線,但是T = 6 K之實驗曲線卻發現有兩個總自旋量子數,在低磁場下,符合S = 4之理論曲線,在高磁場下則符合S = 3之理論曲線。
    Four novel cyano-bridged 4f-3d-metal complexes,
    [Gd(DMF)3(o-phen)(H2O)2Fe(CN)6]2•H2O (1),
    [Gd(DMF)3(bpy)(H2O)Fe(CN)6]2•2H2O(2),
    [Gd(DMF)2(o-phen)(H2O)2Fe(CN)6]n•3nH2O•0.5n(DMF) (3),
    [Gd(H2O)2Fe(CN)6]•2H2O (4),
    have been prepared and X-ray structural characterization. There are found that complexes 1, 2, 3 and 4 are dinuclear, trteanuclear, 1-D nd 3-D network structures, respectively. The temperature ( 2 – 300 K ) dependence of magnetic susceptibility measurements of these Gd3+-NC-Fe3+ complexes shown that complexes 1, 2 and 3 are antiferromagnetic interactions,complexes 4 at low temperature exhibits phase-transition. The field dependence ( 0 - 5 T ) of the magnetization of 4 measured at 6 K and 16 K show saturation of the magnetization. At T = 16 K curve shown correspond to total spin of ground state ST = 3, however, at T = 6 K curve shown two total spin states, one correspond to ST = 4 at low field and the other correspond to ST = 3 at high field.
    显示于类别:[化學學系暨研究所] 學位論文

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