| 研究生: |
林稚展 Lin, Chih-Jan |
|---|---|
| 論文名稱: |
鉛配位化學的研究 Coordination chemistry of lead(II) complexes |
| 指導教授: |
許鏵芬
Hsu, Hua-Fen |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 化學系 Department of Chemistry |
| 論文出版年: | 2013 |
| 畢業學年度: | 101 |
| 語文別: | 英文 |
| 論文頁數: | 108 |
| 中文關鍵詞: | 鉛硫錯合物 、核磁共振光譜 |
| 外文關鍵詞: | lead(II), thiolate, Nucleic Magnetic Resonance Spectroscopy |
| 相關次數: | 點閱:65 下載:2 |
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鉛一直以來對於人類與環境都是一種有毒的金屬,在自然界中植物可以產生多硫的解毒劑用來移去鉛,相反的鉛也會與人體中含硫的生物配位基反應而呈現toxic effect。為了要去了解鉛毒性的基礎化學,所以非常需要完整鉛配位化學的光譜。在本論文中,我們使用了一系列的磷硫配位基PS3, PS3’ and PS3” PhPS2’’ and tBuPS2” PhPS1”合成出六個鉛硫錯合物來探討其化學,分別是[N(CH3)3(PhCH2)][Pb(PS3)] (1), [N(C7H15)4] [Pb(PS3’)] (2), [N(C2H5)4][Pb(PS3”)] (3a and 3b), [Pb(PhPS2”)] (4), [Pb(PhPS1”)2] (5),and [Pb(tBuPS2”)] (6),這些錯合物的合成與X-ray結構的鑑定在我們實驗室裡早已建立,為了要去更加了解這些錯合物的配位化學,所以我們使用了一些物理方法來鑑定例如核磁共振光譜、X-ray繞射、X-ray吸收儀器並且探討這些錯合物的固態和液態的配位化學。
Lead(II) ion has been known to a toxic element for human being and environment. In nature, plants can produce antidotes which contain sulfur ligands to remove lead ion. In contrast, lead(II) ion shows the toxic effect by interacting with sulfur containing bioligands in human body. To provide insights for understanding the fundamental chemistry of the lead(II) toxicity, it is very essential to have a full scope of the lead(II) coordination chemistry. At this particular work, we investigate lead(II) sulfur chemistry by utilizing a series of thiolatophosphine ligands, such as tris(benzenethiolato)phosphine (PS3, PS3’ and PS3”), bis(benzenethiolato)phosphine(PhPS2’’ and tBuPS2”), and benzenethiolatophosphine (PhPS1”). We isolated six lead complexes with these ligands. They are [N(CH3)3(PhCH2)][Pb(PS3)] (1), [N(C7H15)4] [Pb(PS3’)] (2), [N(C2H5)4][Pb(PS3”)] (3a and 3b), [Pb(PhPS2”)] (4), [Pb(PhPS1”)2] (5),and [Pb(tBuPS2”)] (6). The synthesis and X-ray structures have been established previously in our laboratory. To study the coordination chemistry of these complexes in depth, several physical methods such as NMR (1H, 31P, and 207Pb), X-ray absorption spectroscopy in both solid and solution states, were applied on these complexes.
1 Dybowski, C. & Neue, G. Solid state Pb-207 NMR spectroscopy. Prog. Nucl. Magn. Reson. Spectrosc. 41, 153-170, (2002).
2 Briand, G. G., Smith, A. D., Schatte, G., Rossini, A. J. & Schurko, R. W. Probing lead(II) bonding environments in 4-substituted pyridine adducts of (2,6-Me2C6H3S)2Pb: an X-ray structural and solid-state 207Pb NMR study. Inorganic chemistry 46, 8625-8637, (2007).
3 Sharma, P. & Dubey, R. S. Lead toxicity in plants. Brazilian Journal of Plant Physiology 17, 35-52, (2005).
4 Cherian, S. & Oliveira, M. M. Transgenic Plants in Phytoremediation: Recent Advances and New Possibilities. Environmental Science & Technology 39, 9377-9390, (2005).
5 Lasat, M. M. The use of plants for the removal of toxic metals from contaminated soils. (US Environmental Protection Agency, 2000).
6 Mah, V. & Jalilehvand, F. Lead(II) complex formation with glutathione. Inorganic chemistry 51, 6285-6298, (2012).
7 Neupane, K. P. & Pecoraro, V. L. Pb-207 NMR spectroscopy reveals that Pb(II) coordinates with glutathione (GSH) and tris cysteine zinc finger proteins in a PbS3 coordination environment. Journal of inorganic biochemistry 105, 1030-1034, 2011.04.010 (2011).
8 Sneller, F. E. C. et al. Derivatization of Phytochelatins fromSilenevulgaris, Induced upon Exposure to Arsenate and Cadmium: Comparison of Derivatization with Ellman's Reagent and Monobromobimane. Journal of Agricultural and Food Chemistry 48, 4014-4019, (2000).
9 Mishra, S. et al. Lead detoxification by coontail (Ceratophyllum demersum L.) involves induction of phytochelatins and antioxidant system in response to its accumulation. Chemosphere 65, 1027-1039, 2006.03.033 (2006).
10 Erskine, P. T. et al. X-ray structure of 5-aminolevulinic acid dehydratase from Escherichia coli complexed with the inhibitor levulinic acid at 2.0 A resolution. Biochemistry 38, 4266-4276, (1999).
11 Shimoni-Livny, L., Glusker, J. P. & Bock, C. W. Lone Pair Functionality in Divalent Lead Compounds. Inorganic chemistry 37, 1853-1867, (1998).
12 Magyar, J. S. et al. Reexamination of lead(II) coordination preferences in sulfur-rich sites: implications for a critical mechanism of lead poisoning. Journal of the American Chemical Society 127, 9495-9505, (2005).
13 Chen, P. R. et al. Spectroscopic insights into lead(II) coordination by the selective lead(II)-binding protein PbrR691. Journal of the American Chemical Society 129, 12350-12351, (2007).
14 Rekken, B. D., Brown, T. M., Olmstead, M. M., Fettinger, J. C. & Power, P. P. Stable plumbylene dichalcogenolate monomers with large differences in their interligand angles and the synthesis and characterization of a monothiolato Pb(II) bromide and lithium trithiolato plumbate. Inorganic chemistry 52, 3054-3062, (2013).
15 Dean, P. A., Vittal, J. J. & Payne, N. C. Discrete trigonal-pyramidal lead (II) complexes: syntheses and x-ray structure analyses of [(C6H5) 4As][Pb (EC6H5) 3](E= S, Se). Inorganic chemistry 23, 4232-4236 (1984).
16 Yu-chiau, W. Syntheses, Structures, and Characterizations of Lead(II) Complexes in A Sulfur-rich Ligated Environment. (2008).
17 Siegel, R., Nakashima, T. T. & Wasylishen, R. E. Application of Multiple-Pulse Experiments to Characterize Broad NMR Chemical-Shift Powder Patterns from Spin-1/2Nuclei in the Solid State. The Journal of Physical Chemistry B 108, 2218-2226, (2004).