| 多吡啶钴(Ⅲ)配合物与Zn2+形成的新型“关-开”荧光探针 |
| A Newly Designed off-on Luminescent Probe Formed by Polypyridyl Cobalt(Ⅲ) Complex and Zn2+ |
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| 摘要: |
| 关键词: 多吡啶钴配合物 DNA Zn2+ 荧光 |
| 基金项目: |
| Abstract: The formation of heterobimetallic complex [Co(bpy)2(ODHIP)Zn]5+ by [Co(bpy)2ODHIP]3+ and Zn2+ was investigated. The luminescent property of complex was also studied. The results indicated that the nonluminescent monometallic complex [Co(bpy)2ODHIP]3+ could coordinated with Zn2+ to form the luminescent heterobimetallic complex [Co(bpy)2(ODHIP)Zn]5+, the emission intensity increased as increasing the amounts of Zn2+. The luminescence became the strongest at the ratio of CZn/CCo of 1. After binding to DNA, [Co(bpy)2ODHIP]3+ must change its binding mode from partial intercalation to intercalation to make the peripheral coordination site on the ODHIP ligand accessible for Zn2+, the coordination occurred from the opposite side of helix with respect to the intercalated [Co(bpy)2ODHIP]3+, and the luminescent heterobimetallic complex [Co(bpy)2(ODHIP)Zn]5+ was formed. On the other hand, [Co(bpy)2(ODHIP)Zn]5+ bound to DNA by intercalation and situated the region of the intercalated [Co(bpy)2ODHIP]3+ between the base pairs of DNA, while the remained monometallic complex [Co(bpy)2ODHIP]3+ bound to DNA by partial intercalation. |
| Keywords: polypyridyl cobalt complex DNA Zn2+ luminescence |
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| 张黔玲,刘剑洪,任祥忠,李翠华,张培新,刘建忠,计亮年.多吡啶钴(Ⅲ)配合物与Zn2+形成的新型“关-开”荧光探针[J].无机化学学报,2006,22(5):885-889. |
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