以光譜學方法研究含釤鋱配位聚合物內能量轉移之機制

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研究生：	楊心福 Hsin-Fu Yang
論文名稱：	以光譜學方法研究含釤鋱配位聚合物內能量轉移之機制
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：	2018
畢業學年度：	106
語文別：	中文
論文頁數：	85
中文關鍵詞：	稀土元素、光致放光光譜、激發光譜、時間解析光譜、能量轉移
外文關鍵詞：	Rare earth elements, Photoluminescence spectra, Excitation spectra, Time-resolved spectra, Energy transfer
相關次數：	點閱：16 下載：0
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本論文主要使用光致放光光譜、激發光譜及時間解析光譜之光譜技術來分析以中溫水熱法合成的R2(C8H10O4)3配位聚合物，其配位基為1,4-cyclohexanedicarboxylate (C8H10O4，簡稱CHDC)，而配位中心R則是不同莫耳比例之稀土元素釔(Yttrium, Y)、鋱(Terbium, Tb)及釤(Samarium, Sm) (R = Y, Tb, 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，並搭配感應耦合電漿原子發射光譜分析儀(ICP-AES)鑑定配位中心之稀土元素的準確比例。在一系列之R2(CHDC)3(R = Y, Tb, Sm)化合物的放光光譜中，我們觀測到Tb3+的放光強度會因摻入的Sm3+量越多而受到嚴重的淬熄現象(quenching phenomena)。分析SmxTb2-x(CHDC)3化合物之Sm3+和Tb3+放光衰退曲線後發現兩曲線皆擁有兩段放光行為，分別是與Sm3+濃度有關之前半段放光衰退，和與Sm3+和Tb3+濃度皆無關之後半段放光衰退。同時，我們以線性和動力學模型成功地模擬出這些配位聚合物中的衰退情形，並進一步探討所得到的衰退速率與可能的機制。最後，藉由量測一系列與Sm3+相關之物種的放光光譜，來推測影響所觀測到之放光衰退曲線的因素。

Spectroscopic techniques such as photoluminescence, excitation, and time-resolved spectra were used to study the coordination polymers, R2(C8H10O4)3, (R= Y, Sm, Tb, C8H10O4: 1,4-cyclohexanedicarboxylate), synthesized by mid-temperature hydrothermal method. Single crystal and powder X-ray diffraction data were acquired to confirm the structure and purity of these compounds, while the Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) was used to verify the accurate composition of luminescent centers. Quenching phenomena were observed in the emission decay curves of Tb3+ in these compounds as the addition of Sm3+. The emission decay curves of Tb3+ and Sm3+ in these coordination polymers were acquired and analyzed. The analysis shows two emission decay behaviors in both Tb3+ and Sm3+. The first is a Sm3+ concentration dependent fast decay, and the second is a concentration independent slow decay. We have adopted kinetics model that successfully analyzed these decay curves and obtained the related rate constants. The emission spectra of Sm3+ related compounds provides the possible factors that affect the decay curves.

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 鑭系元素與稀土元素    1
1-2 鑭系元素之放光原理    3
1-2-1 鋱離子發光原理    5
1-2-2 釤離子發光原理    6
1-3 研究動機與目標    7
第二章    實驗    11
2-1 實驗目標    11
2-2 合成方法    11
2-2-1 中溫水熱合成法    12
2-2-2 實驗藥品    13
2-2-3 R2(CHDC)3晶體合成步驟    14
2-3 鑑定方法    15
2-3-1 單晶X光繞射    15
2-3-2 粉末X光繞射實驗    17
2-3-3 感應耦合電漿原子發射光譜儀    18
2-4 光譜技術簡介    18
2-4-1 吸收光譜    19
2-4-2 放射光譜    19
2-5 光學元件介紹    20
2-5-1 光源    20
2-5-2 單光儀    22
2-5-3 偵測器    23
2-5-4 示波器    25
2-6 光譜分析研究及儀器裝置    25
2-6-1 光致放光光譜    26
2-6-2 激發光譜    28
2-6-3 時間解析光譜    30
第三章    結果與討論    32
3-1 R2(CHDC)3    32
3-2 晶體鑑定    32
3-3 晶體結構    35
3-4 光致放光光譜    36
3-5 激發光譜    37
3-6 放光衰退曲線    38
3-7 能量提供者之放光衰退曲線    41
3-8 以線性及三維模型模擬484 nm激發之Tb3+和Sm3+放光衰退曲線    44
3-9 355 nm激發之Tb3+和Sm3+放光衰退曲線之分析    49
3-10 304 nm激發之Tb3+和Sm3+放光衰退曲線之分析    53
3-11 衰退速率與物種之探討    57
第四章 結論    66
參考文獻    68


                                

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