title: Fluorescent imidazolium-based cyclophane for detection of guanosine-5'-triphosphate and I(-) in aqueous solution of physiological pH.
abstract: A new water-soluble and fluorescent imidazolium-anthracene cyclophane (1) effectively recognizes the biologically important GTP and I(-) over other anions in a 100% aqueous solution of physiological pH 7.4. Fluorescence and (1)H NMR spectra and ab initio calculations demonstrate that emission arises from the formation of an excimer state and quenching occurs upon GTP/I(-) binding through (C-H)(+)···A(-) hydrogen bond interactions.
authors.affiliation: Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Korea.
authors.forename: Nisar
authors.initials: N
authors.lastname: Ahmed
authors.forename: Bahareh
authors.initials: B
authors.lastname: Shirinfar
authors.forename: Inacrist
authors.initials: I
authors.lastname: Geronimo
authors.forename: Kwang S
authors.initials: KS
authors.lastname: Kim
mesh_terms: D000873:Anthracenes / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D006160:Guanosine Triphosphate / Q000032:analysis*; D006860:Hydrogen Bonding; D006863:Hydrogen-Ion Concentration; D007093:Imidazoles / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D012995:Solubility; D014867:Water / Q000737:chemistry
chemical_list: D000873:Anthracenes; D005456:Fluorescent Dyes; D007093:Imidazoles; D014867:Water; D006160:Guanosine Triphosphate