McMahon, B.K. and Parker, D. (2014) 'Selective ion pair recognition of citrate and zinc ions in water by ratiometric luminescence signaling.', RSC advances., 4 (71). pp. 37649-37654.
Emission from a bright europium(III) complex, based on a 1,4,7-triazacyclononane ring bearing an alkyliminodiacetate group, is modulated only when in the presence of zinc(II) ions and a carboxylate anion and was characterised by ratiometric luminescence analysis at pH 7.4. No change in emission spectral form was observed when either the metal ion or oxy-anion was added separately. Amongst the diamagnetic systems examined, the strongest binding was observed for zinc and citrate (log K = 3.9, pH 7.4) and anion selectivity was observed in the order citrate > lactate/acetate/bicarbonate. No changes in the Eu spectral characteristics were found in the presence of added Ca2+ or Mg2+ ions, consistent with the much lower affinity of these cations for the iminodiacetate binding site.
|Full text:||(AM) Accepted Manuscript|
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|Publisher Web site:||http://dx.doi.org/10.1039/C4RA07894B|
|Date accepted:||No date available|
|Date deposited:||20 November 2014|
|Date of first online publication:||August 2014|
|Date first made open access:||No date available|
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