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首页> 外文期刊>RSC Advances >A sensitive OFF–ON–OFF fluorescent probe for the cascade sensing of Al3+ and F? ions in aqueous media and living cells
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A sensitive OFF–ON–OFF fluorescent probe for the cascade sensing of Al3+ and F? ions in aqueous media and living cells

机译：一个敏感的离上荧光探针，用于Al3 +和F的级联感测？水性介质和活细胞中的离子

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A simple Schiff-base ligand 2-hydroxy-1-naphthaldehyde semicarbazone ( HNS ) was synthesized and characterized. Based on the combined effect of inhibition of CHN isomerization and chelation-enhanced fluorescence (CHEF), HNS functions as a fluorescence “turn on” sensor for Al ~(3+) in buffered aqueous media. Based on the strong affinity of Al ~(3+) to F ~(?) ions, the in situ generated Al ~(3+) – HNS complex can also be utilized as an effective chemosensor for F ~(?) sensing by metal displacement approach, ensuing quenching of fluorescence by the reversible return of HNS from Al ~(3+) – HNS complex. Thus a method using a single probe for the detection of both Al ~(3+) and F ~(?) ions is developed. The system exhibits high selectivity and sensitivity for Al ~(3+) and F ~(?) ions and the detection limits were found to be as low as 6.75 × 10 ~(?8) M and 7.89 × 10 ~(?7) M, respectively. Furthermore, the practical applicability of this probe has been examined in living cells.
机译：合成并表征了一种简单的Schiff-Base配体2-羟基-1-萘二甲苯二脲（HNS）。基于CHN异构化和螯合增强荧光（厨师）的抑制效应，HNS用作缓冲水性介质中Al〜（3+）的荧光“开启”传感器。基于Al〜（3+）至f〜（α）离子的强酰基，原位产生的Al〜（3+） - HNS复合物也可以用作由金属感测的F〜（？）感测的有效化学传感器从Al〜（3+） - HNS复合物中，随着HNS的可逆返回，随后随后淬火荧光。因此，开发了使用单个探针检测Al〜（3+）和F〜（α）离子的方法。该系统对Al〜（3+）和F〜（α）离子具有高选择性和敏感性，发现检测限量低至6.75×10〜（？8）m和7.89×10〜（？7） m分别。此外，在活细胞中检查了该探针的实际适用性。

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