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    题名: 含三價銪鋱離子配位聚合物內能量轉移之動力學研究
    作者: 林予晴;Lin,Yu-Qing
    贡献者: 化學學系
    关键词: 稀土元素;銪鋱離子能量轉移;放光光譜;時間解析光譜
    日期: 2016-07-25
    上传时间: 2016-10-13 12:43:08 (UTC+8)
    出版者: 國立中央大學
    摘要: 本論文使用中溫水熱法合成R2(C8H10O4)3配位聚合物,其中R= Y, Eu, Tb,分別以不同莫耳比例組成配位中心,而配位基C8H10O4為1, 4-cyclohexanedicarboxylate (CHDC)。合成之晶體以單晶及粉末X光繞射鑑定其結構及純度,而配位中心的元素比例則以感應耦合電漿原子發射光譜分析儀(ICP-AES)進行確認。本論文主要針對EuxTb2-x(CHDC)3化合物進行探討,測量了一系列樣品之光致放光光譜、激發光譜及時間解析光譜。進行分析後再次確認Eu3+與Tb3+之間能量傳導會與相鄰機率有關,且發現敏化配位基CHDC會影響到Eu3+與Tb3+之間能量傳導效能。本論文對Eu3+訊號上升時間及Tb3+放光衰退時間進行動力學模型的分析,發現Eu3+與Tb3+之間是個三維能量傳導的模式,並由分析數據得到能量轉移速率常數與相關物理參數,其結果成功地解釋Tb3+→Eu3+之能量轉移效能。;This work adopted mid-temperature hydrothermal method to synthesize coordination polymers, R2(C8H10O4)3, (R= Eu or Tb, and C8H10O4: 1, 4-cyclohexanedicarboxylate, CHDC). Single-crystal and powder x-ray diffraction (XRD) data were collected for confirming their structure and purity. Inductively Coupled Plasma Atomic Emission Spectra (ICP-AES) were also obtained to verify the compositions of Eu3+ and Tb3+. We have acquired the photoluminescence (PL), excitation, and time-resolved spectra of several EuxTb2-x(CHDC)3 compounds. The analysis of these spectra shows that the energy transfer is indeed correlated to the contact probability between Eu3+ and Tb3+ as well as to the sensitization of CHDC ligands. Kinetics models were used to fit the rising temporal profiles of Eu3+ and the decay curves of Tb3+. The results indicate the energy transfer is three dimensional (3D). The rate constants and related parameters were successfully determined. The energy transfer efficiency can be well explained by these results.
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