Issue 45, 2018

Selective signalling of glyphosate in water using europium luminescence

Abstract

A series of four emissive europium complexes has been evaluated for the binding of glyphosate in various aqueous media, including river water and grain extracts. Binding selectivity toward inorganic phosphate and bicarbonate was enhanced by measuring samples at pH 5.9, above the pKa of glyphosate itself. The highest affinity was shown with [Eu·L1], which creates an exocyclic tripicolylamine moiety when one pyridine group dissociates from Eu. Glyphosate was bound selectively over dihydrogenphosphate, glycinate, aminomethylphosphonate and the related herbicide glufosinate. The complex was used to measure glyphosate over the range 5 to 50 μM, in river water and grain extracts.

Graphical abstract: Selective signalling of glyphosate in water using europium luminescence

Supplementary files

Article information

Article type
Paper
Submitted
21 Sept. 2018
Accepted
23 Okt. 2018
First published
26 Okt. 2018

Dalton Trans., 2018,47, 16145-16154

Selective signalling of glyphosate in water using europium luminescence

L. B. Jennings, S. Shuvaev, M. A. Fox, R. Pal and D. Parker, Dalton Trans., 2018, 47, 16145 DOI: 10.1039/C8DT03823F

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