title: Bimodal calix[2]triazole[2]arene fluorescent ionophore.
abstract: Pyrene-appended calix[2]triazole[2]arene capable of bimodal sensing has been synthesized. Upon addition of Zn(2+) (or Cd(2+)), it selectively exhibits an enhanced monomeric emission (~13-20-fold) over other metal ions. On the other hand, it displays excellent selectivity for Fe(2+) over other metal ions (even over Fe(3+)) from the angle of excimeric emissions (10-fold enhancement). Density Functional Theory (DFT) based theoretical calculations distinguished the bimodal activity of the probe and supported the experimental observations.
authors.affiliation: College of Pharmacy, Seoul National University, Seoul 151-742, Korea.
authors.forename: Jihee
authors.initials: J
authors.lastname: Cho
authors.forename: Tuhin
authors.initials: T
authors.lastname: Pradhan
authors.forename: Jong Seung
authors.initials: JS
authors.lastname: Kim
authors.forename: Sanghee
authors.initials: S
authors.lastname: Kim
mesh_terms: D047250:Calixarenes / Q000138:chemical synthesis* / Q000737:chemistry*; D018360:Crystallography, X-Ray; D007476:Ionophores / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008670:Metals / Q000737:chemistry*; D015394:Molecular Structure; D011789:Quantum Theory; D014230:Triazoles / Q000138:chemical synthesis* / Q000737:chemistry*
chemical_list: D007476:Ionophores; D008670:Metals; D014230:Triazoles; C585703:calix(2)triazole(2)arene; D047250:Calixarenes