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首页> 外文期刊>ACS Omega >Thenoyltrifluoroacetone (TTA)–Carbon Dot/Aerogel Fluorescent Sensor for Lanthanide and Actinide Ions
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Thenoyltrifluoroacetone (TTA)–Carbon Dot/Aerogel Fluorescent Sensor for Lanthanide and Actinide Ions

机译:壬基三氟丙酮(TTA)–用于镧系元素和Act系元素离子的碳点/气凝胶荧光传感器

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Contamination of groundwater with radioactive substances comprising actinides and lanthanides is a significant environmental hazard and thus the development of selective, sensitive, and easy-to-apply sensors for water-soluble actinide and lanthanide ions is highly sought. We constructed a new selective fluorescent sensor for UO_(2)~(2+), Sm~(3+), and Eu~(3+) based on a carbon dot (C-dot)–aerogel hybrid prepared through in situ carbonization of 2-thenoyltrifluoroacetone (TTA), a high-affinity heavy metal chelator. The TTA–C-dot–aerogel enabled the detection of UO_(2)~(2+) ions, which induced a significant red fluorescence shift, whereas Eu~(3+) and particularly Sm~(3+) ions gave rise to pronounced fluorescence quenching. Importantly, the lanthanide/actinide ion-selective TTA–C-dots could be synthesized only in situ inside the aerogel pores, indicating the crucial role of the aerogel host matrix both in enabling the formation of the C-dots and in promoting the adsorption and interactions of the lanthanide and actinide metal ions with the embedded C-dots.
机译:用包含act系元素和镧系元素的放射性物质污染地下水对环境造成重大危害,因此,人们强烈希望开发出选择性,灵敏且易于应用的水溶性act系元素和镧系元素离子传感器。我们基于通过原位碳化制备的碳点(C点)-气凝胶混合体,构建了用于UO_(2)〜(2 +),Sm〜(3+)和Eu〜(3+)的新型选择性荧光传感器一种高亲和力的重金属螯合剂2-thenoyltrifluoroacetone(TTA)。 TTA-C-点-气凝胶能够检测UO_(2)〜(2+)离子,从而引起显着的红色荧光位移,而Eu〜(3+)尤其是Sm〜(3+)离子产生了明显的荧光猝灭。重要的是,只能在气凝胶孔内原位合成镧系元素/ act系元素离子选择性TTA-C点,这表明气凝胶基质在形成C点以及促进吸附和吸收方面都起着至关重要的作用。镧系元素和act系元素金属离子与嵌入的C点的相互作用

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