臺灣博碩士論文加值系統

大部分生物酵素的催化中心是由金屬離子和氮、硫配位基組成，如固氮酵素、氫化酵素、氧化亞氮還原酶。為了瞭解這些生物酵素的反應性質，我們實驗室開發了一系列的磷硫配位基來合成金屬催化中心的彷生模型。在此論文中將探討四芽磷硫配位基(P2S2)及其仿生金屬錯合物。
此研究的第一部分為H2[P2S2”]的合成，並利用核磁共振光譜來鑑定產物
在第二部分中，將探討以P2S2”為配位基的鉛二價錯合物，Pb(P2S2”) (1)及[Pb(P2S2”)]2·[Pb2(P2S2”)2] (2)，其固態、液態之磷-31與鉛-207核磁共振光譜。Pb(P2S2”) (1)為單鉛錯化合物包含一個P2S2”配位基組成。[Pb(P2S2”)]2·[Pb2(P2S2”)2] (2)由單鉛錯化合物以及其二聚體共結晶組成。這兩個化合物是由我們實驗室學長發展出來並鑑定。
在第三和第四部份中，P2S2”和六個銅一價離子所形成的錯合物Cu3(P2S2”)(Im)(TMSPhS)]2 已被純化並以X光單晶繞射儀及其他光譜學鑑定；另外，以P2S2”及P2S2*兩個配位基所合成的單鐵氫化酵素模型也由光譜鑑定並與文獻比較。

Our laboratory has developed a series of phosphine-thiolate ligands in order to understand metal thiolate chemistry. It is anticipated the information provided from this study can bring insights for understanding the metal-sulfur chemistry in biological systems as well as in toxicity. In this thesis, diphosphine-dithiolate ligand (P2S2) was utilized for exploring metal chemistry. 31P, 207Pb NMR in solid and solution state were applied on two lead(II) compelexes, Pb(P2S2”) (1) and [Pb(P2S2”)]2·[Pb2(P2S2”)2] (2). Pb(P2S2”) (1) is a monolead(II) species binding with a P2S2” ligand. [Pb(P2S2”)]2·[Pb2(P2S2”)2] contains two monolead(II) units and a dimeric unit. These compounds were synthesized and characterized in our laboratory before.
In addition, a hexacopper(I) complex of P2S2” ligand, [Cu3(P2S2”)(Im)(TMSPhS)]2 , has been isolated and characterized by X-ray crystallography and spectroscopies. Finally, iron carbonyl chemistry with P2S2” ligand was also been explored. The isolated compound was identified as cis-Fe(P2S2”)(CO)2 by comparing the spectroscopies with the other analogue cis-Fe(P2S2*)(CO)2, that is synthesized and well characterized in our laboratory.

Abstract I
中文摘要 II
誌謝 III
List of Contents IV
List of Schemes VII
List of Tables VIII
List of Figures IX
Abbreviations XII
Chapter 1. Introduction 1
1-1. Sulfur-rich biological enzymes 1
1-2. Lead thiolated complexes 1
1-2-1. Example of lead thiolate complexes 2
1-2-2. Lead(II)-thiolate complexes ligated by P2S2” 3
1-3. Hydrogenase 4
1-3-1. Example of the [Fe]-hydrogenase active site models 6
1-4. Coppers in biological systems 8
1-4-1. Example of copper complexes 10
Chapter 2. Results and Discussion 13
2-1. Synthesis and characterization of H2[P2S2”] ligand 13
2-1-1. The overall description of P2S2” ligand synthesis. 13
2-1-2. Synthesis of Li2[PhPCH2CH2PPh]•(THF)4 14
2-1-3. Synthesis of ClPhPC2H4PPhCl 14
2-1-4. Synthesis of 2-trimethylsilyl-thiophenol 15
2-1-5. Synthesis of H2[P2S2”] ligand 15
2-1-6. Nuclear Magnetic Resonance Spectrum of H2[P2S2”] 16
2-2. NMR studies of Pb(P2S2”) (1) and [Pb(P2S2”)]2·[Pb2(P2S2”)2] (2) 18
2-2-1. Synthesis of Pb(P2S2”) (1) and [Pb(P2S2”)]2·[Pb2(P2S2”)2] (2) 18
2-2-2. Elemental analysis 19
2-2-3. Analysis of chemical environment of the P atoms in Pb(P2S2”) unit 20
2-2-4. Analysis of chemical environment of Pb atoms in 1 21
2-2-5. Analysis of chemical environment of P and Pb atoms in complex 2 22
2-2-6. 31P Nuclear Magnetic Resonance Spectrum analysis of complexes 1 and 2 23
2-2-7. 207Pb Nuclear Magnetic Resonance Spectrum analysis of complex 1 and 2 27
2-2-8. Summary for NMR studies of complex 1 and 2 31
2-3. Synthesis and characterization of Complex 3: [Cu3(P2S2”)(Im)(TMSPhS)]2 (3) 32
2-3-1. Elemental analysis 33
2-3-2. X-ray structural determination of [Cu3(P2S2”)(Im)(TMSPhS)]2 33
2-3-3. UV-Vis spectrum of complex 3 40
2-3-4. NMR Spectrum of complex 3 41
2-3-5. The electrochemical study of complex 3. 42
2-4. Reaction of [P2S2”]2- and [P2S2*]2- with Fe(CO)5 44
2-4-1. NMR studies for reaction of [P2S2”]2- and [P2S2*]2- with Fe(CO)5 45
2-4-2. IR spectrum for reaction of [P2S2”]2- and [P2S2*]2- with Fe(CO)5 48
Chapter 3. Conclusions 50
Chapter 4. Experiments and Instruments 51
4-1. General procedures 51
X-ray Crystallographic Data Collection and Refinement of the structures 51
Elemental Analysis 51
Nucleic Magnetic Resonance Spectroscopy 51
Infrared Spectroscopy 52
Uv-Vis Spectroscopy 52
Cyclic Voltammetry 52
4-2. Synthesis 52
Li2[PhPCH2CH2PPh]•(THF)4 52
ClPhPCH2CH2PPhCl 53
2-trimethylsilyl-thiophenol 53
H2[P2S2’’] ligand 53
Cu(CH3CN)4PF6 54
Pb(P2S2”)•CH2Cl2•0.5MeOH (1) and [Pb(P2S2”)]2·[Pb2(P2S2”)2] ]•4CH2Cl2 (2) 54
[Cu3(P2S2”)(Im)(TMSPhS)]2•4CH2Cl2•2EtOH (3) 54
Reference 55
Appendix A 58
Appendix B 60

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