A Novel Free Radical Probe Based on a Preluminescent Iridium Complex Bearing a Nitronyl Radical Moiety
作者:Hirofumi Yoshikawa、Minako Kobayashi、Takuya Takahashi、Kunio Awaga
DOI:10.1246/bcsj.20100050
日期:2010.7.15
quenched nearly completely by the nitronyl radical moiety in the ligand. However, the carbon-centered free radicals, generated from azobisbutyronitrile by UV irradiation, brought about a dramatic recovery of the luminescence of [Ir(ppy) 2 (MebpyIN)]Cl, with a linear relation between the luminescence intensity, and the free radical concentrations up to 120 mM. EPR measurements indicated that the luminescence
一种带有亚氨基氮氧化物联吡啶配体的新型铱络合物 [Ir(ppy) 2 (MebpyIN)]Cl (ppy = 2-苯基吡啶和 MebpyIN = 4-methyl-4'-(1-oxyl-4,4,5,5-)四甲基咪唑啉-2-基)-2,2'-吡啶), 被制备作为预发光探针来检测自由基。尽管相关材料 [Ir(ppy) 2 (bpy)]Cl 显示出强烈的红色发光,但 [Ir(ppy) 2 (MebpyIN)]Cl 的发射几乎完全被配体中的硝酰基自由基部分猝灭。然而,由偶氮二丁腈通过紫外线照射产生的碳中心自由基使 [Ir(ppy) 2 (MebpyIN)]Cl 的发光显着恢复,发光强度与自由基之间呈线性关系。浓度高达 120 mM。