A new fluorescent sensor bearing three dansyl fluorophores for highly sensitive and selective detection of mercury(II) ions

作者：Wanichacheva Nantanit^*; Kumsorn Ploypan; Sangsuwan Rapeepat; Kamkaew Anyanee; Lee Vannajan Sanghiran; Grudpan Kate

来源：Tetrahedron Letters, 2011, 52(46): 6133-6136.

DOI：10.1016/j.tetlet.2011.09.033

• Mercury sensor
• Fluoroionophore
• Hg2+-selectivity
• Dansyl fluorophore

A novel fluorometric sensor bearing three dansyl moieties based on tris[2-(2-aminoethylthio)ethyl]amine was prepared by a simple approach using a conventional two-step synthesis. The sensor exhibits highly Hg2+-selective ON-OFF fluorescence quenching behavior in aqueous acetonitrile solutions and is shown to discriminate various competing metal ions, particularly Cu2+, Ag+, and Pb2+ as well as Ca2+, Cd2+, Co2+, Fe3+, Mn2+, Na+, Ni2+, and Zn2+, with a detection limit of 1.15 x 10(-7) M or 23 ppb.

• 出版日期2011-11-16