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研究生: 張財興
Zhang, Cai-Xing
論文名稱: 以理論計算探討 non-innocent Character of Electron Rich π-extended 8-oxyquinolate Ligands in Ruthenium(II) Bipyridyl 錯合物
Exploring the non-innocent Character of Electron Rich π-extended 8-oxyquinolate Ligands in Ruthenium(II) Bipyridyl Complexes
指導教授: 蔡明剛
Tsai, Ming-Kang
學位類別: 碩士
Master
系所名稱: 化學系
Department of Chemistry
論文出版年: 2014
畢業學年度: 104
語文別: 中文
論文頁數: 131
中文關鍵詞: 太陽能染料電池
英文關鍵詞: 8-oxyquinolate Ligands
DOI URL: https://doi.org/10.6345/NTNU202204451
論文種類: 學術論文
相關次數: 點閱:95下載:42
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  • 提升太陽能染料電池的光電轉換效率,一直是科學家努力的目標。本篇研究針對 [Ru(dcbpy)2 (8-OQN)]+ (dcbpy=4, 4'-dicarboxy-2, 2' bipyridyl, and 8-OQN = 8-oxyquinolate)錯合物與 I- 進行電子轉移的分析,模擬過去文獻中染料與 I-/I3- 氧化還原對的反應機制,藉由 [Ru(dcbpy)2(5,7-di-X-8-OQN)]+ (X=H, F, Cl, Br, I, Me)系列的錯合物來計算,觀察推拉電子基對電子轉移能障的影響。

    The enhancement of the photoelectric conversion efficiency of dye-sensitized solar cells(DSSC) has been a consistently significant topic to scientist. In this work, we analyze the electron transfer of [Ru(dcbpy)2(8-OQN)]+ (dcbpy=4,4'-dicarboxy-2,2' bipyridyl, and 8-OQN=8-oxyquinolate) with I- , Simulating the reaction mechanism of dye and redox couple (I- /I3- ). Also, we change the complex to [Ru(dcbpy)2(5,7-di-X-8-OQN)]+ (X=H, F, Cl, Br, I, Me) to study the difference of the barrier of electron transfer with different electron push-pull functionalities.

    總目錄 圖目錄 IV 表目錄 VI PART_1 中文摘要 1 Abstract 1 第一章 緒論 2 1-1 前言 2 1-2 染料敏化太陽能電池的發展背景 3 1-3 染料敏化太陽能電池的結構與工作原理 4 1-4 氧化態染料被電解質還原的反應機制 7 第二章 計算原理 9 2-1 量子力學 9 2-2 計算化學的理論及方法 10 2-2-1 密度泛函理論 (DENSITY FUNCTIONAL THEORY) 10 2-2-2 基底函數 (BASIS SETS) 11 2-3 計算方法 12 2-3-1單點能量 (SINGLE POINT ENERGY) 12 2-3-2幾何優化 (GEOMETRY OPTIMIZATIONS) 12 2-3-3振動頻率 (FREQUENCY) 13 2-3-4溶劑效應 13 2-4 本論文使用的計算方法 14 第三章 結果與討論 15 3-1 研究目標 15 3-2 幾何結構討論 15 3-3 染料和第一個I-電子轉換 18 3-3-1 YE05_X和第一個I-的電子轉換能障分析 18 3-3-2 RU-8-OQN_Y和第一個I-的電子轉換能障分析 23 3-4染料和第二個I-電子轉換 28 3-4-1 YE05_X和第二個I- 的電子轉換能障分析 28 3-4-2 RU-8-OQN_Y和第二個I- 的電子轉換能障分析 33 3-5 I- 單獨與官能基的結合能 38 第四章 結論 40 第五章 參考文獻 41 PART_2 SYNOPSIS ABSTRACT 45 中文摘要 46 Introduction 47 Results and Discussion 51 Synthesis. 51 Computational analysis 52 UV/Vis electronic absorption spectra and TDDFT. 56 Electrochemistry 61 EPR and UV/Vis/NIR spectroelectrochemistry 64 Conclusions 70 Experimental Section 71 Computational Details 72 References 78 Supporting Information 82 Supporting Information Contents 83 圖目錄 PART_1 Figure 1: DSSC的結構圖。 4 Figure 2: DSSC工作原理的路徑圖。 5 Figure 3: DSSC 運作機制的相對時間圖。 6 Figure 4:勢能面(Potential Energy Surface, PES)的示意圖。 13 Figure 5: RuIII-8-OQN、RuIII-8-OQN-I-和RuII-8-OQN-I2-的幾何結構。 16 Figure 6: YE05+2、YE05+2-I- 和YE05+1-I2- 的幾何結構。 17 Figure 7: YE05_X (X=H、F、Cl、Br、I、Me)的幾何結構。 18 Figure 8-13: YE05_X+1跟I- 之間的相對距離和能量;YE05_X跟I.之間的相對距離和能量(X= H、F、Cl、Br、I、Me)。 19-21 Figure 14: Ru-8-OQN_Y (Y=H、F、Cl、Br、I、Me)的幾何結構。 23 Figure 15-20: Ru-8-OQN_Y+1跟I- 之間的相對距離和能量;Ru-8-OQN_Y跟I.之間的相對距離和能量(X= H、F、Cl、Br、I、Me)。 24-26 Figure 21: [YE05_Y.I-] (Y=H、F、Cl、Br、I、Me)的幾何結構。 28 Figure 22-27: [YE05_X+1.I-]跟I-之間的相對距離和能量;[YE05_X.I-]跟I.之間的相對距離和能量(X= H、F、Cl、Br、I、Me)。 29-31 Figure 28: [Ru-8-OQN_X.I-] (X=H、F、Cl、Br、I、Me)的幾何結構。 33 Figure 29-34: [Ru-8-OQN_Y+1.I-]跟I-之間的相對距離和能量;[Ru-8-OQN_Y.I-]跟I.之間的相對距離和能量(X= H、F、Cl、Br、I、Me)。 34-36 PART_2 Figure 1: Structures of [Ru(bpy)2(R-OQN)]+ complexes 2+ – 8+ here investigated including the [Ru(bpy)3]2+ reference complex 12+. 50 Figure 2: Aerial and side-on perspective views of both the HOMO and HOMO-3 levels for 2+ illustrating the π-bonding/anti-bonding combination of Ru(dπ) and OQN(π) systems. 53 Figure 3: Percentage contributions of Ru, OQN, TPA and bpy fragments to frontier molecular orbitals of 8+. 54 Figure 4: A plot of molecular orbital energy levels (eV) for complexes 12+ - 8+. 55 Figure 5: Overlay of UV/Vis electronic absorption spectra of select complexes (for clarity) recorded in acetonitrile. 56 Figure 6: An overlay of experimental and theoretical TD-DFT spectra for 8+ in acetonitrile. 57 Figure 7: Select molecular orbitals for 8+ determined responsible for the major UV/Vis electronic transitions by TD-DFT analysis. 58 Figure 8: Overlay of cyclic voltammograms for 12+ [Ru(bpy)3]2+, and the 5,7-substituted [Ru(bpy)2(R-OQN)]+ derivatives 6+, 7+ and 8+. 63 Figure 9: X-band EPR (9.5 GHz) spectroelectrochemical data for 62+ and 82+. 66 Figure 10: Mulliken spin-density analysis illustrating hole-delocalization onto the R-OQN ligands of 22+ - 82+, relative to the spin-localized [RuIII(bpy)3]3+ system 13+. 67 Figure 11: UV/Vis/NIR electronic absorption data of 82+. 69 Figure 12: Overlay of UV/Vis/NIR electronic absorption data recorded following controlled potential electrolysis of 13+ and complexes 22+, 32+, 62+, 72+ and 82+. 70 表目錄 PART_1 Table 1: RuIII-8-OQN、RuIII-8-OQN-I-和RuII-8-OQN-I2-的鍵長鍵角表。 16 Table 2: YE05+2、YE05+2-I-和YE05+1-I2-的鍵長鍵角表。 17 Table 3: YE05_X (X=H、F、Cl、Br、I、Me)與I-電子轉移的能量障礙與相對距離表。 22 Table 4: Ru-8-OQN_Y (X=H、F、Cl、Br、I、Me)與I-電子轉移的能量障礙與相對距離表。 27 Table 5: [YE05_Y.I-] (Y=H、F、Cl、Br、I、Me)與第二I-電子轉移的能量障礙與相對距離表。 32 Table 6: [Ru-8-OQN_X.I-] (Y=H、F、Cl、Br、I、Me)與第二I-電子轉移的能量障礙與相對距離表。 37 Table 7:利用B3LYP、MP2與CCSD(T) functional計算出結合能和相對距離。 38 PART_2 Table 1: Metal-ligand contributions (%) to the HOMO of complexes 12+- 8+. 53 Table 2: Electronic absorption and phosphorescence emission data for complexes 12+-8+. 59 Table 3: Electrochemical data for selected complexes 12+ - 8+. 63 Table 4: EPR data of complexes following one electron oxidation. 66 Table 5: UV/Vis/NIR electronic absorption data for complexes 13+- 82+. 69

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