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Dipicolylamine coupled rhodamine dyes: new clefts for highly selective naked eye sensing of Cu2+ and CN? ions

机译:Dipicolylamine偶联的罗丹明染料:用于Cu2 +和CN的高度选择性肉眼感测的新谱号?离子

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The dipicolylamine (DPA) motif which is known as a binder of Zn( II ) ions, has been utilized in devising rhodamine labelled compounds 1 and 2 . Compound 1 acts as a FRET sensor and shows excellent selectivity for Cu( II ) ions over a series of other cations in CH _(3) CN/H _(2) O by exhibiting a colour change (colourless to pink) of the solution. The spectral and colour changes are recovered in the presence of CN ~(?) ions and thus, the ensemble 1 ·Cu ~(2+) in CH _(3) CN/H _(2) O is established as the medium for selective detection of CN ~(?) ions. In contrast, the modified compound 2 with the dipicolylamine motif as the principal binding site has been established as the colorimetric sensor of Cu( II ) ions and the fluorometric sensor of Hg( II ), Zn( II ) and Cd( II ) ions. Both the compounds 1 and 2 are cell permeable and are successfully employed for the detection of intercellular metal ions through bright field and fluorescence imaging.
机译:已知被称为Zn(II)离子的粘合剂的二聚氯胺(DPA)基序已经用于设计标记的化合物1和2的罗丹明。化合物1用作FRET传感器,通过表现出溶液的颜色变化(无色至粉红色),在CH _(3)CN / H _(2)O中的一系列其他阳离子上的Cu(II)离子的优异选择性优异。在CN〜(α)离子存在下回收光谱和颜色变化,因此,CH _(3)CN / H _(2)O中的集合1·Cu〜(2+)被确定为培养基选择性检测CN〜(?)离子。相反,已经建立了作为主要结合位点的具有二聚丙胺基序的改性化合物2作为Cu(II)离子和Hg(II),Zn(II)和Cd(II)离子的荧光传感器。化合物1和2都是细胞可渗透的,并且成功地通过明场和荧光成像检测细胞间金属离子。

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