Responsive europium emission for paralytic shellfish saxitoxin detection in water

A water-soluble europium complex (EuL1), with the chromophore conjugated with both the Eu3+ ion and the aza-18-crown-6 ether moiety (receptor), were synthesized and its photophysical properties were studied. Saxitoxin (STX) selectively binds to EuL1 and induced a 4-fold enhancement in europium emiss...

Full description

Saved in:
Bibliographic Details
Published in:Journal of luminescence 2018-07, Vol.199, p.28-33
Main Authors: Ye, Weijian, Huang, Junrong, Liang, Zhenhao, Zheng, Wenlu, Zhang, Jing-Xiang, Lee, Chi-Sing
Format: Article
Language:English
Subjects:
Europium
Paralytic shellfish poisons
Responsive luminescence
Saxitoxin
Water
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A water-soluble europium complex (EuL1), with the chromophore conjugated with both the Eu3+ ion and the aza-18-crown-6 ether moiety (receptor), were synthesized and its photophysical properties were studied. Saxitoxin (STX) selectively binds to EuL1 and induced a 4-fold enhancement in europium emission in the presence of a variety of metal ions. A mechanistic study indicated that the luminescence enhancement could be triggered by a two-interaction binding mechanism, in which the initial interaction between STX and the aza-18-crown-6 ether moiety of EuL1 induces the secondary interactions between STX and the Eu3+ ion, which resulted in displacement of the coordinated water molecule on Eu3+ ion. •A water-soluble europium complex (EuL1) was synthesized and characterized.•Photophysical studies show good antenna effects between chromophore and Eu3+ ion.•EuL1 selectively binds with saxitoxin without interference from various metal ions.•A two-interaction binding mechanism between EuL1 and saxitoxin has been proposed.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2018.02.061