The abnormal location or generation of superoxide radical anion (O2•–) are implicated in many diseases, including cancers; thus, development of an efficient method to detect O2•– is of great importance. Inspired by the fluorophore-governed selective manner to O2•– and peroxynitrite (ONOO–) of previously reported phosphinate-based fluorescence probes, in this contribution, a phosphinothioate-containing probe, TPP, was designed. The probe exhibited easy accessibility through a one-step sequence and good photostability and biocompatibility. Interestingly, TPP showed high specificity and sensitivity to O2•– over other reactive oxygen species/nitrogen species including ONOO–. Furthermore, with the assistance of two-photon microscopy, TPP was successfully applied for imaging endogenous O2•– in live cells and tissues.
超
氧阴离子自由基(O2•–)的异常分布或产生与许多疾病有关,包括癌症。因此,开发一种高效检测O2•–的方法十分重要。受先前报道的
磷酸酯类荧光探针对O2•–和
过氧亚硝酸盐(ONOO–)的选择性检测启发,本研究设计了一种含
磷硫酸酯的探针
TPP。该探针具有单步合成易得性、良好的光稳定性和
生物相容性。有趣的是,与其他活性氧/氮物种(包括ONOO–)相比,
TPP对O2•–表现出高度特异性和灵敏度。此外,借助双光子显微镜,
TPP成功实现了对活细胞和组织中内源性O2•–的成像。