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研究生： 洪士翔
Shih-Hsiang Hung
論文名稱： 含三價釤配位聚合物內特有淬熄過程之研究
Investigation of Special Quenching Processes in the Coordination Polymers Containing Trivalent Samarium
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： 2019
畢業學年度： 107
語文別： 中文
論文頁數： 74
中文關鍵詞： 三價釤 、稀土元素 、能量轉移 、光致放光光譜 、時間解析光譜 、激發光譜
外文關鍵詞： Trivalent Samarium, Rare earth elements, Energy transfer, Photoluminescence spectra, Time-resolved spectra, Excitation spectra
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    • 本論文主要使用光致放光光譜、激發光譜、時間解析光譜之光譜技術來分析以中溫水熱法合成之YxSm2-x(C8H10O4)3配位聚合物，其配位基為1,4-Cyclohexanedicarboxylate (C8H10O4，簡稱CHDC)，而配位中心為不同莫耳比例之稀土元素釔(Yttrium, Y)及釤(Samarium, Sm)。藉由單晶及粉末X光繞射實驗去鑑定合成出之晶體的結構與純度，並以感應耦合電漿原子發射光譜分析儀(ICP-AES)鑑定配位中心之準確比例。先前研究含Sm3+之配位聚合物之放光衰退曲線在不同激發波長或不同濃度有微差異之衰退速率。本論文加入兩個先前尚未觀測過之高濃度YxSm2-x(CHDC)3樣品並將Sm3+激發至最低上能階取其放光光譜與衰退曲線，發現Sm3+之放光有兩段式行為且此兩段放光行為皆隨著Sm3+濃度上升而加快，即可能有濃度淬熄現象(concentration-dependent quenching)。本篇論文成功以兩段式放光之模型分析YxSm2-x(CHDC)3樣品中Sm3+之放光衰退曲線，並進一步建立可能之淬熄機制。

    Spectroscopy techniques such as photoluminescence (PL), excitation, and time-resolved spectra were used to investigate the coordination polymers, YxSm2-x(C8H10O4)3, synthesized by mid-temperature hydrothermal method. The coordination center is either Yttrium (Y) or Samarium (Sm), and the ligand is1,4-cyclohexanedicarboxylate (C8H10O4, CHDC). Single and powder X-ray diffraction data confirm the structure and purity of these compounds. Inductively-coupled plasma atomic emission spectroscopy (ICP-AES) verifies the elemental compositions of coordination centers. Previous study found a variation in the Sm3+ decay curves in these compounds at different excitation wavelengths as well as different concentrations. In this thesis, the excitation wavelength of exciting Sm3+ to its lowest upper state is adopted to record new emission spectra and decay curves with more higher Sm3+ concentration samples. The analysis of these data exhibits that Sm3+ emission decay curves show a two-stage emission behavior, and the concentration-dependent quenching is observed in both stages. Quenching mechanisms are proposed for explaining the emission quenching behaviors in these compounds.

    中文摘要 I 英文摘要 II 謝誌 III 目錄 I 圖目錄 VII 表目錄 IX 第一章 緒論 1 1-1 稀土元素及其應用 1 1-2 鑭系元素之放光原理 5 1-3 釤以及釤離子發光原理 6 1-4 研究動機與目標 7 第二章 實驗 10 2-1 實驗目標 10 2-2 合成方法 11 2-2-1 中溫水熱合成法 11 2-2-2 R2(CHDC)3晶體合成步驟 13 2-3 鑑定方法 13 2-3-1 單晶X光繞射 14 2-3-2 粉末X光繞射實驗 15 2-3-3 感應耦合電漿原子發射光譜儀 16 2-4 光學量測元件 17 2-4-1 光源 17 2-4-2 分光裝置 19 2-4-3 偵測器 19 2-4-4 示波器 22 2-5 光譜技術簡介及儀器介紹 23 2-5-1 激發光譜 23 2-5-2 光致放光光譜 25 2-5-3 時間解析光譜 28 第三章 結果與討論 31 3-1 R2(CHDC)3 31 3-2 晶體鑑定 31 3-3 晶體結構 34 3-4 光致放光光譜 35 3-5 激發光譜 36 3-6 放光衰退曲線 37 3-7 以兩段式分析Sm3+放光衰退曲線 40 3-8 484 nm激發Sm3+之放光衰退曲線分析 43 3-9 Sm3+放光衰退曲線兩段式行為之分析 46 3-10 Sm3+之慢速衰退曲線之探討 47 3-11 Sm3+之快速衰退曲線之探討 53 第四章 結論 56 參考文獻 58 附錄 60

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