title: Hg2+-selective OFF-ON and Cu2+-selective ON-OFF type fluoroionophore based upon cyclam.
abstract: [structure: see text]. A new cyclam derivative having two different fluorophores of pyrene and NBD subunits was prepared, and its Hg2+- and Cu2+-selective signaling behaviors were investigated. The detection limits for the analysis of Hg2+ and Cu2+ ions were found to be 7.9 x 10(-6) and 2.6 x 10(-7) M in aqueous acetonitrile solution (H2O-CH3CN = 10:90, v/v), respectively. The compound also exhibited a selective Hg2+/Cu2+-induced OFF-ON-OFF type of signaling pattern that can be utilized for the construction of functional supramolecular switching systems.
authors.affiliation: Department of Chemistry, Chung-Ang University, Seoul 156-756, Korea.
authors.forename: So Hee
authors.initials: SH
authors.lastname: Kim
authors.forename: Jun Soo
authors.initials: JS
authors.lastname: Kim
authors.forename: Sang Mi
authors.initials: SM
authors.lastname: Park
authors.forename: Suk-Kyu
authors.initials: SK
authors.lastname: Chang