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  • Title: A new dual fluorogenic and chromogenic "turn-on" chemosensor for Cu²⁺/F⁻ ions.
    Author: Yu H, Lee JY, Angupillai S, Wang S, Feng S, Matsumoto S, Son YA.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2015; 151():48-55. PubMed ID: 26125982.
    Abstract:
    Turn "off-on" chemosensor 2-(-2-((3',6'-bis(diethylamino)-3-oxospiro[isoindoline-1,9'-xanthen]-2-yl)imino)ethylidene)-N-phenylhydrazine-1-carbothioamide (RBS) was designed and synthesized. Using the naked eye, RBS showed favorable observation characteristics with both Cu(2+) and F(-) ions. The various modes of sensitivity shown by RBS toward the Cu(2+) and F(-) ions were investigated by spectral techniques, including UV-Vis, fluorescence and (1)H NMR spectroscopy. The Job's plot indicated the formation of 1:1 complex between RBS and Cu(2+)/F(-). The binding constant of the RBS-guest(-) complexes were found to be 1.3×10(4) and 6.2×10(3)M(-1) for the RBS-Cu(2+) and RBS-F(-), respectively.
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