A visible-light-excited Eu<sup>3+</sup>complex-based luminescent probe for highly sensitive time-gated luminescence imaging detection of intracellular peroxynitrite
作者:Jing Wu、Yuzhu Yang、Lin Zhang、Huan Wang、Mei Yang、Jingli Yuan
DOI:10.1039/c7tb00345e
日期:——
Although considerable efforts have been made for the development of lanthanide complex-based luminescent probes, a major drawback of the current probes is the requirement for UV excitation. In this work, a visible-light-excited Eu3+ complex-based luminescent probe, [Eu(HDPH)3(DPBT)] (HDPH: 1,1,1,2,2,3,3-heptafluoro-6-(2,4-dimethoxyphenyl)-4,6-hexanedione; DPBT: 2-(N,N-diethylanilin-4-yl)-4,6-bis(3
尽管已经为基于镧系元素络合物的发光探针的开发做出了相当大的努力,但是当前探针的主要缺点是需要紫外线激发。在这项工作中,基于可见光的Eu3 +络合物发光探针[Eu(HDPH)3(DPBT)](HDPH:1,1,1,2,2,3,3-七氟-6-(2 ,4-二甲氧基苯基)-4,6-己二酮; DPBT:2-(N,N-二乙基苯胺-4-基)-4,6-双(3,5-二甲基吡唑-1-基)-1,3,5 -triazine)已设计和合成用于活细胞中过氧亚硝酸盐(ONOO-)的高灵敏和选择性的时间门控发光成像检测。探针在400 nm处显示出很强的可见光激发峰,激发窗口延伸到460 nm以上。与ONOO-反应后,探针在610 nm处的发光被极大地淬灭,因为Eu3 +络合物的激发态由于2,4-二甲氧基苯基部分与ONOO-之间的相互作用而失活。探针的剂量依赖性发光下降显示出良好的线性,ONOO-的检出限为1.8μM,并且