Nanomolar colorimetric quantitative detection of Fe³⁺ and PPi with high selectivity

Zhanxian Li; Haixia Li; Caixia Shi; Mingming Yu; Liuhe Wei; Zhonghai Ni

doi:10.1016/j.saa.2016.02.001

Nanomolar colorimetric quantitative detection of Fe³⁺ and PPi with high selectivity

Spectrochim Acta A Mol Biomol Spectrosc. 2016 Apr 15:159:249-53. doi: 10.1016/j.saa.2016.02.001. Epub 2016 Feb 6.

Authors

Zhanxian Li¹, Haixia Li², Caixia Shi², Mingming Yu², Liuhe Wei², Zhonghai Ni³

Affiliations

¹ School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, China; College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.
² College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.
³ School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, China. Electronic address: nizhonghai@cumt.edu.cn.

PMID: 26878355
DOI: 10.1016/j.saa.2016.02.001

Abstract

A novel rhodamine and 8-hydroxyquinoline-based derivative was synthesized, which is shown to act as a colorimetric chemosensor for Fe(3+) in aqueous solution with high selectivity over various environmentally and biologically relevant metal ions and anions with a distinct color change from colorless to pink in very fast response time (<1 min). Fe(3+) can be detected quantitatively in the concentration range from 6.7 to 16 μM and the detection limit (LOD) on UV-vis response of the sensor can be as low as 15 nM. The 'in situ' prepared Fe(3+) complex (1⋅Fe) showed high selectivity toward PPi against many common anions, and sensitivity (the LOD can be as low as 71 nM). In addition, both the chemosensor and the 'in situ' prepared Fe(3+) complex are reusable for the detection of Fe(3+) and PPi respectively.

Keywords: Colorimetric sensor; Fe(3+); Naked-eye detection; PPi; Quantitative detection.

Publication types

Research Support, Non-U.S. Gov't