以光譜學方法再探討含銪鋱配位聚合物內能量轉移機制

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研究生：	宋盈進 Ying-Chin Sung
論文名稱：	以光譜學方法再探討含銪鋱配位聚合物內能量轉移機制
指導教授：	張伯琛
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：	83
中文關鍵詞：	光譜、鑭系元素、能量轉移
相關次數：	點閱：22 下載：0
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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.

中文摘要    I
英文摘要    II
謝誌    III
目錄    IV
圖目錄    VIII
表目錄    XI
第一章    緒論    1
1-1 螢光粉發展    1
1-2 稀土元素與鑭系元素    3
1-3 鑭系元素之放光原理    4
1-3-1 銪離子之放光    5
1-3-2 鋱離子之放光    8
1-4 先前研究    9
1-5 研究目標    13
第二章    實驗    14
2-1 實驗目標    14
2-2 合成方法    15
2-2-1 中溫水熱合成法    15
2-2-2 藥品使用    17
2-2-3    R2(CHDC)3晶體合成    17
2-3 樣品之鑑定    18
2-3-1單晶X光繞射實驗    18
2-3-2粉末X光繞射實驗    20
2-3-3 感應耦合電漿原子發射光譜    20
2-4 光譜技術簡介    21
2-4-1 吸收光譜    21
2-4-2 放射光譜    22
2-5 光譜量測元件    23
2-5-1 光源    23
2-5-2 單光儀    24
2-5-3 偵測器    25
2-5-4 示波器    27
2-6 光譜技術介紹與儀器架設    27
2-6-1 光致放光光譜    27
2-6-2 激發光譜    29
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    34
3-4 光致放光光譜    36
3-5 激發光譜    37
3-6 Tb3+與Eu3+間能量轉移機制    38
3-7 能量轉移機制介紹    40
3-8 光譜重疊度    41
3-9 484 nm激發之Tb3+放光衰退曲線    43
3-10放光光譜差異探討    44
3-11不同化合物激發光譜    46
3-12更高激發波長之差異    47
3-12-1 同光源激發之不同比例EuxTb2-x(CHDC)3    47
3-12-2 不同光源激發之EuxTb2-x(CHDC)3    49
3-13 Tb3+放光衰退曲線之動力學模型    50
3-14 Tb3+放光衰退曲線分析    52
3-15 有效作用距離RS    57
第四章    結論    63
參考文獻    65


                                

1. Evans, R. C.; Carlos, L. D.; Douglas, P.; Rocha, J. Tuning the emission colour in mixed lanthanide microporous silicates: energy transfer, composition and chromaticity. J. Mater. Chem. 2008, 18, 1100-1107.
2. Carnall, W. T.; Goodman, G. L.; Rajnak, K.; Rana, R. S. A systematic analysis of the spectra of the lanthanides doped into single crystal LaF3.
J. Chem. Phys. 1989, 90, 3443-3457.
3. An, Y.; Schramm, G. E.; Berry, M. T. Ligand-to-metal charge-transfer quenching of the Eu3+ (5D1) state in europium-doped tris (2,2,6,6-tetramethyl-3,5-heptanedionato)gadolinium (III). J. Lumin. 2002, 97, 7-12.
4. Carlos L. D.; Videria A. L. L. Emission spectra and local symmetry of the Eu3+ ion in polymer electrolytes. Phys. Rev. B 1994, 49, 11721-11727.
5. Blasse, G.; Grabmaier, B. C. Luminescence Materials 1994, Springer-Verlag, New York, U.S.A.
6. Huber, G.; Syassen, K.; Holzapfel, W. B. Pressure dependence of 4f levels in europium pentaphosphate up to 400 kbar. Phys. Rev. B 1977, 15, 5123-5128.
7. Cotton, S, Dr. Lanthanide and Actinide Chemistry 2006, John Wiley & Sons, Inc., Chichester, England.
8. 陳孟琳, 國立中央大學化學系碩士論文. (2013).
9. 蕭郁如, 國立中央大學化學系碩士論文. (2014).
10. 林予晴, 國立中央大學化學系碩士論文. (2016).
11. Ferreira, A.; Ananias, D.; Carlos, L. D.; Morais, C. M.; Rocha, J. Novel microporous lanthanide silicates with tobermorite-like structure. J. Am. Chem. Soc. 2003, 125, 14573-14579.
12. Alice, D.; David, R. A.. Effect of high pressure on the crystal structures of polymorphs of glycine. Cryst. Growth Des. 2005, 5, 1415-1427.
13. Barbara, M. W. The flux growth of single crystals of rare earth perovskites (orthoferrites, orthochromites and aluminates) J. Cryst. Growth 1969, 5, 323-328.
14. Masanobu, N.; Kyouhei, W. Grain size control of LiMn2O4 cathode material using microwave synthesis method. Solid State Ionics 2003, 164, 35-42.
15. Jin, H. L; Kyung, H. K. Electrical and optical properties of ZnO transparent conducting films by the sol–gel method. J. Cryst. Growth. 2003, 247, 119-125.
16. 陳逸翔, 國立中央大學化學系碩士論文. (2012).
17. Ramya, A. R.; Sharma, D.; Natarajan, S.; M. L. P. Reddy, M. L. P. Inorg.
Chem. 2012, 51, 8818.
18. Pavitra, E.; Raju, G. S. R.; Ko, Y. H.; Yu, J. S. Phys. Chem. Chem. Phys.
2012, 14, 11296.
19. Blasse, G. Luminescence of inorganic solids: from isolated centres to concentrated systems. Prog. Solid St. Chem. 1988, 18, 79-171.
20. Yokota, M.; Tanimoto, O. Effects of diffusion on energy transfer by resonance. J. Phys. Soc. Jpn. 1967, 22, 779-784.
21. Kellendonk, F.; Blasse, G. Luminescence and energy transfer in EuAl3B4O12. J. Chem. Phys. 1981, 75, 561-571.
22. Wu, Z. C.; Shi, J. X.; Wang, J.; Gong, M. L.; Su, Q. A novel blue-emitting phosphor LiSrPO4: Eu2+ for white LEDs. J. Solid State Chem. 2006, 179, 2356-2360.

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