| 研究生: |
黃桂施 Huang, Gui-Shih |
|---|---|
| 論文名稱: |
高價釩與多硫配位基的反應 The Chemistry of High Valent Vanadium Oxo Species Interacting with Trisbezenethiolatosilane Ligands |
| 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: | 2004 |
| 畢業學年度: | 92 |
| 語文別: | 中文 |
| 論文頁數: | 93 |
| 中文關鍵詞: | 蛋白質酪氨酸磷酸脂酵素 、多硫配位基 、釩 、固氮酵素 |
| 外文關鍵詞: | vanadium, nitrogenase, trisbezenethiolatosilane, PTP |
| 相關次數: | 點閱:132 下載:5 |
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本論文的研究較感興趣的是釩和硫(thiolate)的作用在生物體內所造成的影響,特別是蛋白質酪氨酸磷酸脂酵素(PTP)會將tyrosine磷酸化被破壞掉,而造成醣類無法進入細胞而引發糖尿病,釩化合物具有仿胰島素效應,可和酵素中的Cys殘基作用而抑制PTP。所以我主要的研究是利用多硫矽化合物配位基(trisbezenethiolatosilane)和VO3+化合物反應,藉此來瞭解在多硫環境下高價金屬釩的配位化學及反應機制,這類的多硫矽化合物配位基包含PhSiS3、SiS3及SiS3’,意外的是,我得到的divanadium(IV) dioxo化合物I、II及III,其多硫矽化合物配位基的結構已經改變,Si-H/Si-C鍵在反應過程中斷裂了。
另外一個研究方向是為了要瞭解固氮酵素活化中心的異核金屬位置所扮演的角色,我合成出一新的多硫配位基S3N(IV),其結構和固氮酵素異核部位的配位環境相同。
My research has been interested in studying vanadium thiolate chemistry due to its biological significance. Particularly, to understand the protein-tyrosine phosphatase (PTP) which is inhibited by vanadate through the interaction with the Cys residue in the enzyme, I focus my research on the basic chemistry of VO3+ species interacting with thiolato ligands. In the reaction of VO3+ with trisbezenethiolatosilane ligand system, PhSiS3, SiS3 and SiS3’,1 we obtained unexpected divanadium(IV) dioxo complexes, I, II, and III, showing in the following scheme. The formation of compounds I, II, and III indicates that the Si-H/Si-C bonds are cleaved during the reaction.
In addition, in order to understand the role of the heterometallic site in the cofactor of nitrogenase, I develop a novel ligand, S3N (IV), which might provide the metal complexes containing the coordination environment similar to that of the heterometallic site of the enzyme.
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