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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CNIENION的高度选择性肉眼感测的新谱号

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摘要

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 CH3CN/H2O 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.Cu2+ in CH3CN/H2O 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:已知作为Zn(II)离子的粘合剂的二聚氯胺(DPA)基序已经用于设计罗丹明标记的化合物1和2.化合物1用作FRET传感器,并且显示出优异的Cu(II)离子的选择性 CH3CN / H2O中的其他阳离子系列通过展示溶液的颜色变化(无色至粉红色)。 在CNIE中存在光谱和颜色变化,因此,CH 3 CN / H 2 O中的集合1.Cu2 +作为选择性检测CNIENION的培养基。 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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