摘要
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.
The formation of heterobimetallic complex [Co（bpy）2（ODHIP）Zn]^5＋by [Co（bpy）2ODHIP]^3＋ and Zn^2＋ 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 Zn^2＋ to form the luminescent heterobimetallic complex [Co（bpy）2（ODHIP）Zn]^5＋, the emission intensity increased as increasing the amounts of Zn^2＋. 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 Zn^2＋, 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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2006年第5期885-889,共5页
Chinese Journal of Inorganic Chemistry
基金
广东省自然科学基金博士启动基金(No.04300882)
深圳市科技计划资助项目(No.200328)
