Perchlorotrityl radical-fluorophore conjugates as dual fluorescence and EPR probes for superoxide radical anion.

Perchlorotrityl radical-fluorophore conjugates as dual fluorescence and EPR probes for superoxide radical anion.
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全氯三苯甲基自由基-荧光团缀合物作为超氧自由基阴离子的双荧光和 EPR 探针。

DOI:
10.1016/j.bmc.2009.11.034
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发表时间:
2010
影响因子:
3.5
通讯作者:
Kuppusamy,Periannan
Kuppusamy,Periannan
中科院分区:
医学3区
文献类型:
--
作者:
Wang,Jinhua;Dang,Vinh;Zhao,Wei;Lu,Dongning;Rivera,BrianK;Villamena,FrederickA;Wang,PengGeorge;Kuppusamy,Periannan

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全氯三苯甲基自由基,单取代的荧光团使用不同链长的酰胺接头,合成和表征。电子顺磁共振(EPR)光谱研究表明,自由电子耦合与芳香族氢核和远程耦合与亚甲基氢的连接基团。荧光团共轭的三苯甲基与超氧阴离子自由基的反应表现为EPR信号的猝灭和荧光发射光谱的增强。这项工作提出了第一个例子的全氯三苯甲基-荧光团共轭物,可以潜在地被用作双探针,用于在氧化应激介导的条件下,在生物系统中的超氧化物的检测。
Perchlorotrityl radicals, mono-substituted with a fluorophore using an amide linker of varying chain length, were synthesized and characterized. Electron paramagnetic resonance (EPR) spectroscopic study indicated free-electron coupling with the aromatic hydrogen nuclei and long-range coupling with the methylene hydrogens of the linker group. Reactivity of the fluorophore-conjugated trityls with superoxide radical anion showed quenching of EPR signal and enhancement of fluorescence emission spectrum. This work presents the first example of a perchlorotrityl-fluorophore conjugate that can potentially be employed as a dual probe for the detection of superoxide under oxidative stress-mediated conditions in biological systems.
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