A dual-sensitized luminescent europium(III) complex as a photoluminescent probe for selectively detecting Fe3+

Yafeng Zhao; Yanhong Xu; Bing Xu; Peipei Cen; Weiming Song; Lijuan Duan; Xiangyu Liu

doi:10.1039/D0RA03821K

A dual-sensitized luminescent europium(iii) complex as a photoluminescent probe for selectively detecting Fe³⁺†

Yafeng Zhao,‡^a Yanhong Xu,‡^a Bing Xu,^c Peipei Cen,*^b Weiming Song,*^a Lijuan Duan^a and Xiangyu Liu

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* Corresponding authors

^a College of Agriculture, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
E-mail: xiangyuliu432@126.com, songwm@nxu.edu.cn

^b College of Public Health and Management, Ningxia Medical University, Yinchuan 750021, China
E-mail: 13895400691@163.com

^c School of Chemistry and Chemical Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China

^d State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, China

Abstract

A new luminescent Eu^III complex, namely [Eu₂(BTFA)₄(OMe)₂(dpq)₂] (1), in which BTFA = 3-benzoyl-1,1,1-trifluoroacetone and dpq = dipyrido [3,2-d:2′,3′-f] quinoxaline, has been designed and synthesized by employing two different ligands as sensitizers. Crystal structure analysis reveals that complex 1 is composed of dinuclear Eu^III units crystallized in the monoclinic P [1 with combining macron] space group. Notably, 1 exhibits high thermal stability up to 270 °C and excellent water stability. The photoluminescence property of the complex is investigated. Further studies show 1 can recognize Fe³⁺ ions with high selectivity from mixed metal ions in aqueous solution through the luminescence quenching phenomenon. Furthermore, the recyclability and stability of 1 after sensing experiments are observed to be adequate. By virtue of the superior stability, detection efficiency, applicability and reusability, the as-prepared Eu^III complex can be a promising fluorescent material for practical sensing.

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DOI: https://doi.org/10.1039/D0RA03821K
Article type: Paper
Submitted: 28 Apr 2020
Accepted: 19 Jun 2020
First published: 25 Jun 2020
This article is Open Access

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RSC Adv., 2020,10, 24244-24250

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A dual-sensitized luminescent europium(III) complex as a photoluminescent probe for selectively detecting Fe³⁺

Y. Zhao, Y. Xu, B. Xu, P. Cen, W. Song, L. Duan and X. Liu, RSC Adv., 2020, 10, 24244 DOI: 10.1039/D0RA03821K

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