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  • Title: A sugar-aza-crown ether-based fluorescent sensor for Cu2+ and Hg2+ ions.
    Author: Hsieh YC, Chir JL, Yang ST, Chen SJ, Hu CH, Wu AT.
    Journal: Carbohydr Res; 2011 May 15; 346(7):978-81. PubMed ID: 21470598.
    Abstract:
    A sugar-aza-crown ether (SAC)-based fluorescent sensor 4 was prepared. It contains a pyrene as the fluorophore and its fluoroionophoric properties toward transition metal ions were investigated. Chemosensor 4 exhibits highly selective recognition toward Cu(2+) and Hg(2+) ions among a series of tested metal ions in methanol solution. The association constants for 4*Cu(2+) and 4*Hg(2+) in methanol solution were calculated to be 7.4×10(1)M(-1) and 4.4×10(3)M(-1), respectively. Chemosensor 4 formed complexes with the Cu(2+) or Hg(2+) ion at a 1:1 ligand-to-metal ratio with a detection limit of 1.3×10(-4)M Cu(2+) and 1.26×10(-5)MHg(2+), respectively.
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