Selective signalling of glyphosate in water using europium luminescence

Jennings, Laura B.; Shuvaev, Sergey; Fox, Mark A.; Pal, Robert; Parker, David

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.

Citation

Jennings, L. B., Shuvaev, S., Fox, M. A., Pal, R., & Parker, D. (2018). Selective signalling of glyphosate in water using europium luminescence. Dalton Transactions, 47(45), 16145-16154. https://doi.org/10.1039/c8dt03823f

• Journal Article Type: Article
• Acceptance Date: Oct 23, 2018
• Online Publication Date: Oct 26, 2018
• Publication Date: Oct 26, 2018
• Deposit Date: Dec 6, 2018
• Publicly Available Date: Oct 23, 2019
• Journal: Dalton Transactions
• Print ISSN: 1477-9226
• Electronic ISSN: 1477-9234
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 47
• Issue: 45
• Pages: 16145-16154
• DOI: https://doi.org/10.1039/c8dt03823f
• Public URL: https://durham-repository.worktribe.com/output/1312126