Chemical modulation of the luminescence of a DNA-bound diruthenium(II) complex by copper(II) ion and EDTA |
| |
| Authors: | Qian Li Hui Chao Miao-Jing Chen Hong Li Zheng-He Xu |
| |
| Affiliation: | (1) Key Lab of Technology on Electrochemical Energy Storage and Power Generation in Guangdong Universities, School of Chemistry and Environment, South China Normal University, 510006 Guangzhou, People’s Republic of China;(2) Department of Chemistry, Sun Yat-Sen University, 510275 Guangzhou, People’s Republic of China; |
| |
| Abstract: | A method for the chemical modulation of the photoluminescence of a DNA-bound diruthenium(II) complex, [(bipy)2Ru(bpib)Ru(bipy)2]4+ (bipy = 2,2′-bipyridine, bpib = 1,4-bis([1, 10]phenanthroline [5,6-d]imidazol-2-yl) benzene) by the introduction of Cu2+ ion and EDTA has been developed. The diruthenium(II) complex showed strong photoluminescence both in buffer solutions and on an indium-tin oxide (ITO) surface, which was not modulated by Cu2+ or EDTA. The DNA-bound [(bipy)2Ru(bpib)Ru(bipy)2]4+ with a binding constant of 3.8 × 104 M−1 showed an enhancement in the luminescence based on the electrostatic interaction between the complex and DNA. The presence of Cu2+ was found to quench the luminescence of DNA-bound [(bipy)2Ru(bpib)Ru(bipy)2]4+, but the quenched luminescence was recovered by addition of an equimolar concentration of EDTA. Hence, the photoluminescence of DNA-bound [(bipy)2Ru(bpib)Ru(bipy)2]4+ depends strongly on the introduction of Cu2+ and EDTA. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
