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Published on: February 10, 2014
A ratiometric probe for the selective time-gated luminescence detection of potassium in water
Evan A Weitz1, Valérie C Pierre
1Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, MN 55455, USA.
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.
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