以光譜學方法研究含釔釤元素之配位化合物的淬熄效應

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研究生：	林士群 Shih-Chun Lin
論文名稱：	以光譜學方法研究含釔釤元素之配位化合物的淬熄效應 Spectroscopic Study of Quenching Mechanisms in the Coordination Compounds Containing Yttrium
指導教授：	張伯琛 Bor-Chen Chang
口試委員:
學位類別：	碩士 Master
系所名稱：	理學院 - 化學學系 Department of Chemistry
論文出版年：	2017
畢業學年度：	105
語文別：	中文
論文頁數：	83
中文關鍵詞：	釔釤、光譜、淬熄
外文關鍵詞：	Yttrium, Spectroscopic study, quench
相關次數：	點閱：13 下載：0
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本論文使用中溫水熱法合成實驗所需之配位聚合物R2(C8H10O4)，配位基為1, 4-cyclohexanedicarboxylate (C8H10O4, CHDC)，而配位中心則是不同比例的稀土元素釔(Yttrium, Y)、鋱(Terbium, Tb)及釤(Samarium, Sm) (R = Y, Tb, Sm)。以單晶X光繞射(XRD)與粉末X光繞射(PXRD)確認其結構以及純度，以感應耦合電漿原子發射光譜(ICP-AES)確認配位中心稀土元素之確切比例。我們使用光致放光譜、激發光譜以及時間解析等光譜資訊去研究能量轉移的過程。分析YxSmyTb2-x-y(CHDC)3化合物中Sm3+放光衰退曲線後發現其中存在兩種淬熄機制。第一種淬熄機制是與含Y的物種有關，第二種淬熄機制則正比於化合物中Sm3+的濃度。這類化合物中所有的Sm3+放光衰退曲線皆能吻合一個三維能量轉移的動力學模型。並可求得相關的速率常數以及能量轉移參數。

Mid-temperature hydrothermal method was adopted to synthesize the coordination polymers, R2(C8H10O4)3, with 1,4-cyclohexanedicarboxylate (C8H10O4, CHDC) ligands and different compositions of rare earth elements (R= Y, Tb, and Sm) for this study. Single crystal and powder X-ray diffraction (XRD) data of these compounds were acquired for confirming their structure and purity, while inductively-coupled plasma atomic emission spectra (ICP-AES) were also obtained to verify the exact compositions of rare earth elements. The spectroscopic data including photoluminescence (PL), excitation, and time-resolved spectra were acquired for investigating the energy transfer processes. The analysis of Sm3+ decay curves in YxSmyTb2-x-y(CHDC)3 reveals two quenching mechanisms. The first quenching process is related to some yttrium-containing species, and the second quenching process is proportional to the Sm3+ concentration. All of the Sm3+ decay curves in these compounds can be well fit by a kinetic model based on three dimensional energy transfer. The related rate constants and energy transfer parameters are determined and explained.

中文摘要    I
英文摘要    II
謝誌    III
目錄    IV
圖目錄    VII
表目錄    X
第一章 緒論    1
1-1 人工照明與發光材料    1
1-2 稀土元素與鑭系元素    3
1-3 鑭系元素之放光原理    4
1-3-1 釤離子發光原理    5
1-3-2 鋱離子發光原理    6
1-4 先前研究    7
1-5 研究目標    13
第二章 實驗    14
2-1 實驗目標    14
2-2 合成方法    14
2-2-1 中溫水熱合成法    15
2-2-2 實驗藥品    16
2-2-3 R2(CHDC)3晶體合成步驟    17
2-3 樣品之鑑定方法    17
2-3-1 單晶X光繞射實驗    17
2-3-2 粉末X光繞射分析    19
2-3-3 感應耦合電漿原子發射光譜儀    20
2-4 光譜技術簡介    20
2-4-1 放射光譜    21
2-4-2 吸收光譜    21
2-5 光譜量測元件簡介    22
2-5-1 光源    22
2-5-2 單光儀    23
2-5-3 偵測器    24
2-5-4 示波器    25
2-6 光譜分析技術及儀器裝置    26
2-6-1 激發光譜    26
2-6-2 光致放光光譜    27
2-6-3 時間解析光譜    28
第三章 結果與討論    30
3-1 R2(CHDC)3    30
3-2 晶體結構    30
3-3晶體鑑定    32
3-4 光致放光光譜    35
3-5 激發光譜    35
3-6 Sm3+之放光衰退曲線    36
3-7 能量提供者之放光衰退曲線    40
3-8 激發YxSmyTb2-x-y(CHDC)3之Sm3+放光衰退曲線分析    42
3-9 激發YxSm2-x(CHDC)3之Sm3+放光衰退曲線分析    51
3-10 兩種光源激發YX淬熄速率之分析    55
3-11 淬熄機制之分析    57
3-12 有效作用距離RS    59
3-13 淬熄物種之探討    60
第四章 結論    64
參考文獻    66


                                

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