title: A ratiometric probe for the selective time-gated luminescence detection of potassium in water.
abstract: A europium probe for the ratiometric detection of potassium in water is presented. This probe demonstrates high sensitivity, with an affinity for K(+) in the mM range, and high selectivity for K(+) over Na(+), Ca(2+), Mg(2+) and Li(+). The long luminescence lifetime of the probe and its large Stokes shift further enable accurate determination of the concentration of K(+) in complex aqueous media.
authors.affiliation: Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, MN 55455, USA.
authors.forename: Evan A
authors.initials: EA
authors.lastname: Weitz
authors.forename: Valérie C
authors.initials: VC
authors.lastname: Pierre
mesh_terms: D018360:Crystallography, X-Ray; D005063:Europium / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D049449:Luminescence; D008163:Luminescent Measurements; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011188:Potassium / Q000032:analysis*; D013997:Time Factors; D014867:Water / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D009942:Organometallic Compounds; D014867:Water; D005063:Europium; D011188:Potassium