首页> 美国卫生研究院文献>ACS Omega >New Six-Membered pH-Insensitive Rhodamine Spirocyclein Selective Sensing of Cu2+ through C–C Bond Cleavageand Its Application in Cell Imaging
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New Six-Membered pH-Insensitive Rhodamine Spirocyclein Selective Sensing of Cu2+ through C–C Bond Cleavageand Its Application in Cell Imaging

机译:新型六元pH不敏感的若丹明螺环C–C键断裂的Cu2 +选择性传感技术及其在细胞成像中的应用

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摘要

A new rhodamine-based chemosensor >1 with a six-membered spirocyclic ring has been synthesized, which exhibits excellent pH stability and shows selective “turn-on” fluorescent detection of Cu2+ ions over a series of other metal ions including Cu+ ions. The expansion of spirocycle improves the stability and selectivity of the chemosensors in sensing of metal ions. Till today only few rhodamine structures >R1–>R5 with thiourea-, hydrazine amide-, or pyrrole-decorated six-membered spirocyclic rings are known that exhibit metal-ion sensing via C–N bond cleavage of the spiro ring. In this context, rhodamine compound that responds to the metal ion through C–C bond cleavage of the six-membered spiro ring is completely unknown. The present example is a first-time report that demonstrates selective sensing of Cu2+ ions through C–C bond cleavage over the conventional existing systems in the literature. The chemosensor >1 is cell permeable and can detect Cu2+ in live cells using confocal microscopy in the biologically relevant pH range with high photostability.
机译:合成了具有六元螺环的新型基于罗丹明的化学传感器> 1 ,该传感器具有出色的pH稳定性,并显示出选择性的“开启”荧光检测Cu 2 + + 离子)高。螺环的扩展提高了化学传感器在金属离子感测中的稳定性和选择性。到今天为止,只有少数具有硫脲,肼酰胺或吡咯修饰的六元螺环的若丹明结构> R1 – > R5 能够通过C表现出金属离子感测螺环的-N键断裂。在这种情况下,完全不知道通过六元螺环的CC键裂解对金属离子作出反应的若丹明化合物。本示例是首次报道,该文献展示了在文献中常规的现有系统上,通过C–C键断裂对Cu 2 + 离子的选择性感测。化学传感器> 1 具有细胞渗透性,并且可以在生物相关的pH范围内使用共聚焦显微镜以高光稳定性检测活细胞中的Cu 2 +

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