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| 研究生： |
徐采玲 Tsai-Lin Hsu |
|---|---|
| 論文名稱： |
含三價釤鋱配位聚合物內能量轉移過程之再研究 Reinvestigation of Energy Transfer Processes in the Coordination Polymer Containing Trivalent Terbium and 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： | 89 |
| 中文關鍵詞： | 配位聚合物 、三價釤 、放光光譜 、激發光譜 、時間解析光譜 、能量轉移 |
| 外文關鍵詞： | Coordination Polymer, Trivalent Samarium, Photoluminescence Spectra, Excitation Spectra, Time-Resolved Spectra, Energy Transfer |
| 相關次數： | 點閱：16 下載：0 |
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本實驗室以中溫水熱法合成R2(C8H10O4)3配位聚合物，配位中心R為不同莫耳比例之三價稀土元素釔(Yttrium, Y)、鋱(Terbium, Tb)及釤(Samarium, Sm) (R = Y, Tb, Sm)所組成；而配位基C8H10O4 (1,4-cyclohexanedicarboxylate，簡稱CHDC)。先前在SmxTb2-x(CHDC)3化合物中，觀測到Sm3+和Tb3+放光衰退曲線皆和Sm3+濃度有關，但無法驗證Tb3+和Sm3+之間是否有能量轉移。因此本篇論文以不同激發波長和新的實驗條件取得SmxTb2-x(CHDC)3及YxSmyTb2-x-y(CHDC)3配位聚合物新的放光光譜(emission spectra)及放光衰退曲線(emission decay curves)，分析及比較這些新的光譜資料可確認Tb3+會傳遞能量給Sm3+，其轉移機制為上能階能量轉移(upper state energy migration)，而其能量轉移效率(energy transfer efficiency)則取決於Tb3+-Tb3+之間的能量傳導。此外，還發現此類含Sm3+及Tb3+之配位聚合物內有多光子的能量轉移現象。
Coordination polymers, R2(CHDC)3, were synthesized using mid-temperature hydrothermal synthesis. The coordination center, R, is the trivalent rare earth elements: Yttrium (Y), Terbium (Tb), or Samarium (Sm) with different compositions, and the ligand is 1,4-cyclohexanedicarboxylate (C8H10O4, CHDC). Previous study found the emission decay curves of Sm3+ and Tb3+ are correlated with Sm3+ concentration, but no conclusion on the existence of Tb3+→ Sm3+ energy transfer. In this thesis, new emission spectra and emission decay curves of SmxTb2-x(CHDC)3 and YxSmyTb2-x-y(CHDC)3 are acquired at new excitation wavelength and experimental condition. Analysis and comparison of these spectroscopic data verify the Tb3+→ Sm3+ energy transfer. This energy transfer process is an upper state migration and its energy transfer efficiency is dependent of Tb3+- Tb3+ energy hopping. In addition, a new multiphoton energy transfer process was found in these coordination polymer compounds.
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