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研究生:王博彥
論文名稱:水相中銅與胺基酸錯合物之光分解含氮產物研究
論文名稱(外文):Determination of Ammonium Ion and Amines in the Photolysis of Cu(II)-Amino Acid Complexes in Aqueous Solution
指導教授:吳劍侯羅俊光羅俊光引用關係
學位類別:碩士
校院名稱:國立清華大學
系所名稱:原子科學系
學門:工程學門
學類:核子工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:英文
論文頁數:134
中文關鍵詞:銨離子胺類銅錯合物胺基酸量子產率
外文關鍵詞:Ammonium ionaminescopper complexesamino acidsquantum yields
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本論文主要是使用高效能液相層析(High Performance Liquid Chromatography, HPLC)搭配鄰苯二甲醛(o-phthaldialdehyde, OPA)螢光衍生法以及離子層析法(Ion Chromatography, IC)來探討銅胺基酸錯合物在經由波長313 nm的光照射之後,可能產生的含氮產物(銨離子(NH4+)與胺類(amines))及其量子產率。光照下,銅胺基酸錯合物經由配位基(胺基酸)上的電子轉移到金屬(銅)(ligand to metal charge transfer, LMCT),使二價銅還原成一價銅,胺基酸則被氧化,並進行一系列分解。實驗結果顯示,銅錯合物系統下,除了配位基為β-丙胺酸(β-alanine)時,可以量測到乙胺(ethylamine)外,在本實驗中所使用的α-胺基酸(α-alanine, leucine, isoleucine, phenylalanine, valine, methionine and arginine )都只能量測到銨離子。同時,在不同的條件(pH、銅與配位基濃度)下,一價銅與銨離子的量子產率比(ΦCu(I) /ΦNH3)皆約維持在2。根據實驗結果,提出一個可能的光分解反應路徑。
Two analytical methods, High Performance Liquid Chromatography (HPLC) o-phthaldialdehyde (OPA) derivatization / Fluorometry and Ion Chromatography (IC) / Conductimetry, have been established for qualitative and quantitative analysis of the possible nitrogen-containing photoproduct compounds (amines and ammonium ions) from photolysis of copper(II) – amino acids complexes in aqueous soultion without oxygen under monochromatic radiation at 313 nm. Due to the ligand to metal charge transfer (LMCT) during the irradiation, copper(II) was reduced to copper(I) and the ligand was oxidized and decomposed to final products. While testing different ligands including α-alanine, leucine, isoleucine, phenylalanine, valine, methionine, proline and arginine with copper(II), photoproduction of ethylamine instead of NH4+ is only observed in Cu(II)-β-alanine complex system. The quantum yields of ammonium ion (ΦNH3) as a major nitrogen-containing photoproduct is just the half of the quantum yields of copper(I) (ΦCu(I)) in the copper(II)-α-amino acid complex system. The experimental results show that the value ΦCu(I) /ΦNH3 ratio still remains the same while alternating the pH, concentration of metal, and ligand in Cu(II)-α-alanine complexes. According to the results from the study, a possible pathway for the decomposition of the amino acids in the copper(II)-α-amino acid complex system is proposed.
Chinese Abstract
English Abstract
Acknowledgements
Table of Contents
List of Figures
List of Tables
Preface
Part 1 1
Chapter 1 Introduction 2
1-1 The Properties of NH4+ 2
1-2 The Properties of Amines 3
1-3 Motivation 4
1-4 Objectives 4
Chapter 2 Literature Review 6
2-1 Methods for Determination of Amines 6
2-1-1 Gas Chromatography (GC) 6
2-1-2 High Performance Liquid Chromatography (HPLC) 7
2-2 Methods for Determination of NH4+ in Aqueous Phase 13
2-2-1 Electroanalytical Methods 13
2-2-2 Spectrophotometry 13
2-2-3 Fluorometry 14
2-2-4 Gas Chromatography 15
2-2-5 Determination of Ammonium Ion by Ion Chromatography 18
2-3 Conclusion 23
2-4 Introduction of Fluorometry 23
2-5 Introduction of Ion Chromatography 24
2-5-1 The Principle of Ion Chromatography 24
2-5-2 The Principle of Conductmetric Detection 29
Chapter 3 Experimental Section 33
3-1 Equipment 33
3-2 Reagents 36
3-3 Cleaning Condition and Instrument Maintenance 38
3-4 Experimental Procedures 38
3-4-1 Stock Solution Preparation 38
3-4-2 Procedures for Analysis of Ethylamine 40
3-4-3 Procedures for Analysis of NH4+ 43
Chapter 4 Results and Discussion 45
4-1 Determination of Ethylamine 45
4-1-1 Determination of Excitation and Emission Wavelength of OPA-ethylamine Derivative 45
4-1-2 Effect of OPA Reagent pH 46
4-1-3 Effect of 2-mercaptoethanol Concentration 47
4-1-4 Effect of OPA Concentration 48
4-1-5 Effect of Na2B4O7 Buffer Concentration 49
4-1-6 Effect of Reaction Time 50
4-1-7 Effect of Sample Matrix Interference 51
4-1-8 Calibration Curve, Precision and Method Detection Limit 52
4-2 Determination of NH4+ 54
4-2-1 Effect of Temperature on Ion Chormatography 55
4-2-2 Effect of Concentration of Methanesulfonic Acid (MSA) 57
4-2-3 Effect of Disproportional Concentration Ratio of Na+ and NH4+ Ions on Their Separation 60
4-2-4 Standard Addition Method 62
4-2-5 Calibration Curve, Precision and Method Detection Limit 63
Chapter 5 Conclusion 66
Reference 68
Part 2 76
Chapter 1 Introduction 77
1-1 Properties of Copper 77
1-2 Copper in the Environment 77
1-3 Research Objectives 79
Chapter 2 Literature Review 81
2-1 Photochemical Behavior of Copper Complexes 81
2-2 Model Assumption 85
Chapter 3 Experimental Section 90
3-1 Equipments 90
3-2 Reagents 92
3-3 Experimental Procedures 92
3-3-1 Preparation of Working Solution 92
3-3-2 Procedures for Determination of Cu+, Amines and NH4+ 93
3-3-3 Procedures for Determination of Light Intensity 95
3-4 Experimental Scheme 96
Chapter4 Results and Discussion 98
4-1 Determination of Possible N-containing Photolysis Products 98
4-2 Cu+/NH4+ Ratio 102
4-2-1 Effect of pH Value 103
4-2-2 Effect of Concentration of Ligand 108
4-2-3 Effect of Concentration of Cu(II) 112
4-3 Purge Effect 120
4-4 Effect of Different Ligands 123
4-4-1 Non-polar Amino Acids 123
4-4-2 Basic Amino Acids 125
4-5 Glycine and Serine 129
Chapter 5 Conclusion 130
Chapter 6 Future Works 131
References 132
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