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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/76672

    Title: 以光譜學方法再探討含銪鋱配位聚合物內能量轉移機制
    Authors: 宋盈進;Sung, Ying-Chin
    Contributors: 化學學系
    Keywords: 光譜;鑭系元素;能量轉移
    Date: 2018-07-24
    Issue Date: 2018-08-31 11:32:49 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 本論文使用中溫水熱法合成含有不同比例之Eu3+和Tb3+組成配位中心以及1, 4-cyclohexanedicarboxylate (C8H10O4, CHDC)組成的配位聚合物,表示為R2(CHDC)3。合成之晶體以單晶及粉末X光繞射鑑定其結構及純度,感應耦合電漿原子發射光譜分析儀(ICP-AES)可以定量其不同配位中心之比例。本論文主要利用光致放光光譜、激發光譜及時間解析光譜再探討EuxTb2-x(CHDC)3一系列樣品的能量轉移機制與速率。由光譜分析確認了EuxTb2-x(CHDC)3樣品中,Tb3+傳遞能量給Eu3+是以上能階轉移的機制傳遞能量。本論文參考EuxTb2-x(CHDC)3之Eu3+訊號上升時間資訊後,對不同激發波長之Tb3+放光衰退時間進行動力學模型的分析,藉由分析數據得到能量轉移速率常數與相關物理參數,發現其Tb3+- Tb3+之能量轉移速率有極值,並成功地解釋Tb3+→Eu3+之能量轉移效率。;This work adopted the mid-temperature hydrothermal method to synthesize the coordination polymers with different compositions of Eu3+ and Tb3+ as the coordination center and 1,4-cyclohexanedicarboxylate (C8H10O4, CHDC) as the ligands. Their structure and purity were verified by single crystal and powder X-ray diffraction data and the exact composition of Eu3+ and Tb3+ was determined by the Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES). Photoluminescence, excitation, and time-resolved spectra of these EuxTb2-x(CHDC)3 compounds were obtained for re-investigating the energy transfer mechanisms and rates. The analysis of spectroscopic data indicates that the energy transfer from Tb3+ to Eu3+ is an upper state energy migration instead of photon energy transfer process. Moreover, the emission decay curves of Tb3+ and the rising curves of Eu3+ at different excitation wavelengths were acquired and analyzed by kinetics models. These results show there is a concentration limitation for energy transfer efficiency and our model successfully explains the observed Tb3+→Eu3+ relative energy transfer efficiency.
    Appears in Collections:[化學研究所] 博碩士論文

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