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  • Title: A new multifunctional Schiff base as a fluorescence sensor for Al³⁺ and a colorimetric sensor for CN⁻ in aqueous media: an application to bioimaging.
    Author: Lee SA, You GR, Choi YW, Jo HY, Kim AR, Noh I, Kim SJ, Kim Y, Kim C.
    Journal: Dalton Trans; 2014 May 14; 43(18):6650-9. PubMed ID: 24626562.
    Abstract:
    A multifunctional fluorescent and colorimetric receptor 1 ((E)-N'-((8-hydroxy-1,2,3,5,6,7-hexahydropyrido[3,2,1-ij]quinolin-9-yl)methylene)benzohydrazide) for the detection of both Al(3+) and CN(-) in aqueous solution has been developed. Receptor 1 exhibited an excellent selective fluorescence response toward Al(3+). The sensitivity of the fluorescent based assay (0.193 μM) for Al(3+) is far below the limit in the World Health Organization (WHO) guidelines for drinking water (7.41 μM). In addition, receptor 1 showed an excellent detection ability in a wide pH range of 4-10 and also in living cells. Moreover, receptor 1 showed a highly selective colorimetric response to CN(-) by changing its color from colorless to yellow immediately without any interference from other anions.
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