研究生: |
葉權廣 Yeh, Chuan-Kuang |
---|---|
論文名稱: |
錸金屬聯啶三羥基錯合物之合成與光物理性質 Syntheses and Photophysics of Rhenium Diimine Tricarbonyl Complexes |
指導教授: |
張一知
Chang, I-Jy |
學位類別: |
碩士 Master |
系所名稱: |
化學系 Department of Chemistry |
論文出版年: | 2001 |
畢業學年度: | 89 |
語文別: | 中文 |
論文頁數: | 82 |
中文關鍵詞: | 錸 |
英文關鍵詞: | Rhenium |
論文種類: | 學術論文 |
相關次數: | 點閱:141 下載:0 |
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本實驗共合成出六種錸金屬聯啶三羥基錯化合物。在鹼性溶液中Re(dnbpy)(CO)3Cl 可進行取代反應合成出下列錯化合物Re((MeO)2bpy)(CO)3(CH3O)、Re((EtO)2bpy)(CO)3(C2H5O)、Re(imbpy)(CO)3(im)Cl、Re((im)2bpy)(CO)3(im)Cl。錸金屬聯啶三羥基錯合物在氰甲烷中激發態之生命期分別為77 ns Re(mcbpy)(CO)3Cl、340 ns Re((MeO)2bpy)(CO)3(CH3O)、404 ns Re((EtO)2bpy)(CO)3(C2H5O)、6143 ns Re(imbpy)(CO)3(im)Cl。其冷光量子產率(f)分別為0.025 Re(mcbpy)(CO)3Cl、0.017 Re((MeO)2bpy)(CO)3(CH3O)、0.012 Re((EtO)2bpy))(CO)3(C2H5O)、0.0486 Re(imbpy)(CO)3(im)Cl、0.0019 Re((im)2bpy)(CO)3(im)Cl。相較於無取代基之Re(bpy)(CO)3Cl 激發態生命期為39 ns,冷光量子產率(f)為0.0031,本論文所報告之錯合物激發態生命期都較長、冷光量子產率(f)都較大。更適合進行雙分子的反應。
Six rhenium diimine tricarbonyl complexes have been synthesized. Re(dnbpy)(CO)3Cl and Re(mcbpy)(CO)3Cl (where dnbpy = 4,4-dinitro-2,2-bipyidine, mcbpy = 4-methyl-2,2-bipyridine-4-carboxylic acid) were synthesized from direct ligand substitution. In basic solution, Re(dnbpy)(CO)3Cl undergo SN2 substitution reaction to replace -NO2 and give Re((MeO)2bpy)(CO)3(CH3O), Re((EtO)2bpy)(CO)3(C2H5O), Re(imbpy)(CO)3(im)Cl, and Re((im)2bpy)(CO)3(im)Cl complexes(where im = imidazole).
In acetonitrile solution, these complexes have excited-state lifetime of 77, 340, 404, and 6143 ns for Re(mcbpy)(CO)3Cl, Re((MeO)2bpy)(CO)3(CH3O), Re((EtO)2bpy)(CO)3(C2H5O), and Re(imbpy)(CO)3(im)Cl, respectively. Emission quantum yields are 0.025, 0.017, 0.012, 0.0486, and 0.0019 for Re(mcbpy)(CO)3Cl, Re((MeO)2bpy)(CO)3(CH3O), Re((EtO)2bpy)(CO)3(C2H5O), Re(imbpy)(CO)3(im)Cl, and Re((im)2bpy)(CO)3(im)Cl, repectively. The lifetime and quantum yield of the non-substituted bipyridine complex, Re(bpy)(CO)3Cl, are 39 ns and 0.0031, respectively. Complexes prepared in this thesis have much higher quantum yield and longer lifetime and, therefore, are better candidates for photochemistry.
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