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

葉權廣(Chuan-Kuang Yeh)

指導教授 ： 張一知

國立臺灣師範大學/理學院/化學系/碩士(2000年)

摘要

無資料

關鍵字

錸

並列摘要

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.

並列關鍵字

Rhenium

參考文獻

3. Lee, A. J. Chem. Rev. 1987, 87, 711.

5. Kalyanasundaram, K. J. Chem. Soc.Faraday Trans. 2 1986, 82, 2401.

7. Hawecker, T.; Lehn, J.-M.; Ziessel, R. J. Chem. Soc. Chem. Commun. 1983, 536.

9. Wrighton, M. S.; Morse, D. L. J. Am. Chem. Soc. 1974, 96, 998.

21. Ziessel, R.; Juris, A.; Venturi, M. Inorg. Chem. 1998, 37, 5061.