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研究生: 劉國棟
Kuo-Tung Liu
論文名稱: 電子順磁共振應用於一些自由基、自由基對、晶體結構及相變的研究
EPR study of some radical, radical pairs, crystal structure and
指導教授: 余健治
Yu, Jiang-Tsu
學位類別: 碩士
Master
系所名稱: 物理學系
Department of Physics
畢業學年度: 82
語文別: 中文
論文頁數: 69
中文關鍵詞: 電子順磁共振;自由基;自由基對
英文關鍵詞: electron paramagnetic resonance; radical; radical pairs
論文種類: 學術論文
相關次數: 點閱:283下載:12
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  • 本論文包含下列四個研究:一、利用[N(CH3)3]+自由基研究TrMCC晶體低
    溫相中TrM離子位置性無序的現象。二、利用[N(CH3)3]+自由基研究TMCC
    晶體的結構相變與雙晶現象。三、摻入V4+離子的KTP晶體內,V4+離子佔
    據位置的研究。四、經uv照射產生,焦硫酸銨晶體產生自由基對的研究。

    The thesis includes the following four researches: 1.Two
    chemically inequivallent [N(CH3)3]+ radical species produced
    via r-irradiation were detected by EPR in TrMCC crystal. This
    indicates a twofold, static disorder of the TrM ions. 2.The
    hexagonal P63/m to monoclinic P21/m structural phase transition
    in TMCC has been investigated by EPR. The result indicates the
    presence of merohedral twinning below the phase transition.
    3.Two chemically inequivallent V4+ ions were detected by EPR in
    vanadium-doped KTiOPO4 crystal. The results allow one to
    identify the occupation sites of the doped V4+ ions and to
    conclude that the doped V4+ ions form VO2+ ions. 4.Irradiation
    of (NH4)2S2O8 single crystal with uv light produces two kinds
    of radical pairs, pairs I and pairs II. Radical pairs I is
    stable at room temperature, and can be identified to be SO5-
    pairs. Radical pairs II can be produced by uv-irradiation and
    detected by EPR only at low temperatures and identified to be
    SO4- pairs.
    The thesis includes the following four researches: 1.Two

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