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A ratiometric, fluorescent BODIPY-based probe for transition and heavy metal ions

机译:用于转变和重金属离子的比率,荧光BODIPY探针

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A novel metal ion-sensitive fluorescent probe – 4,4-difluoro-8-(4-methylphenyl)-5-(phenylethynyl)-3-[bis(pyridin-2-ylmethyl)amino]-4-bora-3 a ,4 a -diaza- s -indacene – based on the BODIPY platform with di(2-picolyl)amine as chelator has been synthesized and spectroscopically and photophysically characterized. The generalized treatment of the solvent effect shows that solvent dipolarity is primarily responsible for the observed shifts of the absorption and fluorescence emission maxima. Complex formation with various metal ions is investigated in acetonitrile solution by means of spectrophotometric and fluorometric titrations. The BODIPY indicator forms 1?:?1 complexes with several transition metal (Ni ~(2+) , Cu ~(2+) , Zn ~(2+) ) and heavy metal (Cd ~(2+) , Hg ~(2+) ) ions, producing large bathochromic shifts in the absorption and fluorescence spectra and, except for Ni ~(2+) , cation-induced fluorescence amplifications. The dissociation constants of the metal ion complexes range from 4 μM for Hg ~(2+) to 48 μM for Zn ~(2+) .
机译:一种新型金属离子敏感荧光探针 - 4,4-二氟-8-(4-甲基苯基)-5-(苯基乙炔基)-3- [双(吡啶-2-基甲基)氨基] -4-Bora-​​3a, 4 - 基于具有DI(2-吡拉缩)胺的BOBIPY平台作为螯合剂的基于螯合剂,并且光谱和光学发物质表征。溶剂效果的广义处理表明,溶剂衍生主要负责观察到的吸收和荧光发射最大值的偏移。通过分光光度法和荧光滴定在乙腈溶液中研究具有各种金属离子的复杂形成。 Bodipy指示器形式1?:1络合物,具有几种过渡金属(Ni〜(2+),Cu〜(2+),Zn〜(2+))和重金属(Cd〜(2+),Hg〜( 2+)离子,在吸收和荧光光谱中产生大的碱性偏移,除Ni〜(2+)外,阳离子诱导的荧光扩增除外。金属离子配合物的解离常数为Zn〜(2+)的Hg〜(2+)至48μm的4μm。

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