以光譜學方法研究含鋱配位聚合物之淬熄機制

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姓名

陳冠輝(Guan-Hui Chen) 查詢紙本館藏

畢業系所

化學學系

論文名稱

以光譜學方法研究含鋱配位聚合物之淬熄機制

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摘要(中)

本論文利用中溫水熱法合成以1,4-cyclohexanedicarboxylate (C8H10O4, CHDC)作為配位基，含有不同莫耳比例釔鋱之R2(CHDC)3配位聚合物晶體(R= Y, Tb)。合成後的晶體以粉末X光繞射(powder X-ray diffraction, PXRD)確認晶體的晶相與純度。本論文量測了一系列不同比例鋱之配位聚合物的光致放光光譜(photoluminescence spectra)、時間解析光譜(time-resolved spectra)以及激發光譜(excitation spectra)，利用上述這些光譜技術來分析YxTb2-x(CHDC)3與Tb2(CHDC)3樣品，發現這些樣品當中並不存在濃度淬熄效應(concentration quenching)；同時量測與Tb3+有關的物質之光致放光光譜與時間解析光譜，進而推測造成YxTb2-x(CHDC)3與Tb2(CHDC)3樣品差異性的可能來源。此外，也探討YxTb2-x(CHDC)3樣品在不同激發波長下有不同Tb3+放光衰退行為的可能原因。

摘要(英)

Mid-temperature hydrothermal method was adopted to synthesize the coordination polymers with 1,4-cyclohexanedicarboxylate (C8H10O4, CHDC) ligands and different compositions of Y3+ and Tb3+ as the coordination center. These compounds were analyzed by powder X-ray diffraction to confirm their structure and purity. The photoluminescence, excitation, and time-resolved spectra of these compounds such Tb2(CHDC)3 and YxTb2-x(CHDC)3 were recorded and the emission decay curves of Tb3+ in these compounds were analyzed. The results show no concentration quenching phenomenon in these compounds, but there exist profound differences between Tb2(CHDC)3 and YxTb2-x(CHDC)3. Furthermore, different excitation wavelengths also exhibit different emission decay rates. Possible factors for explaining these differences were investigated.

關鍵字(中)

★ 光譜學方法
★ 鋱
★ 淬熄機制

關鍵字(英)

★ spectroscopic study
★ terbium
★ quenching mechanisms

論文目次

目錄

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 鋱：稀土元素 1
1-1-1 鋱 1
1-1-2 鋱離子的能階 2
1-1-3 鋱離子的發光原理 3
1-1-4 鋱離子的應用 4
1-2 文獻回顧 5
1-3 研究目標 9
第二章實驗 10
2-1 實驗目標 10
2-2 合成方法 10
2-2-1 中溫水熱合成法 11
2-2-2 藥品使用 12
2-2-3 R2(CHDC)3晶體合成 12
2-3 產物之鑑定方法 13
2-4 光譜技術簡介 14
2-4-1 吸收光譜(Absorption Spectra) 15
2-4-2 放射光譜(Emission Spectra) 15
2-5 光譜量測元件介紹 16
2-5-1 光源 16
2-5-2 單光儀(Monochromator) 17
2-5-3 偵測器(Photon Detector) 18
2-5-4 示波器(Oscilloscope) 20
2-6 光譜分析技術及其儀器裝置 20
2-6-1 光致放光光譜(Photoluminescence Spectra) 20
2-6-2 時間解析光譜(Time-resolved Spectra) 22
2-6-3 激發光譜(Excitation Spectra) 24
第三章結果與討論 27
3-1 R2(CHDC)3 27
3-2 晶體結構 27
3-3 晶體鑑定 29
3-4 激發光譜 31
3-5 484 nm雷射激發之放光光譜 33
3-6 484 nm雷射激發之Tb3+放光衰退曲線 35
3-7 355 nm雷射激發之Tb3+放光衰退曲線 38
3-8 307 nm雷射激發之Tb3+放光衰退曲線 39
3-9 前半段Tb3+放光衰退曲線 40
3-10 線性分析後半段Tb3+放光衰退曲線 42
3-11 不同雷射激發波長下之Tb3+放光衰退行為 45
3-12 Tb2(CHDC)3與YxTb2-x(CHDC)3的差異性 47
3-13 不同樣品之Tb3+放光衰退曲線比較 51
3-14 YxTb2-x(CHDC)3在不同激發波長之行為探討 52
第四章結論 54
參考文獻 56

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指導教授

張伯琛(Bor-Chen Chang)

審核日期

2018-7-24

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