A dual chemosensor for Cu2+ and Fe3+ based on π-extend tetrathiafulvalene derivative. Issue 1 (5th January 2017)

• Record Type: Journal Article
• Authors: Ma, Yuwen; Leng, Taohua; Qu, Yarong; Wang, Chengyun; Shen, Yongjia; Zhu, Weihong
• Is Part Of: Tetrahedron. Volume 73:Issue 1(2017)
• Page Start: 14
• Page End: 20
• Publication Date: 2017-01-05
• Subjects: π-extend tetrathiafulvalene -- Dual chemosensor -- Copper (II) -- Iron (III); Chemistry, Organic -- Periodicals; 547.005
• DOI: 10.1016/j.tet.2016.11.033
• Languages: English
• ISSNs: 0040-4020

Abstract

Abstract: A new dual chemosensor (TTF-PBA ) for Fe 3+ and Cu 2+ in different signal pathways was designed and synthesized. The absorption spectrum, fluorescence spectrum and cyclic voltammograms changed in the presence of Cu 2+ and Fe 3+ . The optical color changed within 5 s from yellow to orange upon the addition of Cu 2+, and it changed to dark yellow when Fe 3+ existed. The cyclic voltammogram of Cu 2+ /TTF-PBA changed from Eox = 0.50 V, Ered = 0.32 V to Eox = 0.64 V, Ered = 0.80 V ( vs Ag/AgCl) upon the addition of 2.0 equiv. Cu 2+ . As for Fe 3+ /TTF-PBA, its oxidation wave disappeared, and its reduction wave appeared at Ered = −0.59 V ( vs Ag/AgCl) upon the addition of 4.0 equv. Fe 3+ . The sensor displayed high selectivity for Cu 2+ and Fe 3+ over other ions including Pb 2+, Zn 2+, Ni 2+, Ag +, Cr 3+, Mn 2+, Al 3+, Co 2+, Pd 2+, Hg 2+, Fe 2+, Cd 2+, Ce 3+, Bi 3+ and Au 3+, the detection limits for Cu 2+ and Fe 3+ ion reached as low as 5.33 × 10 −7 mol/L and 5.34 × 10 −7 mol/L, respectively. Furthermore, when Fe 3+ existed, Cu 2+ can be detected sequentially by the sensor through the absorption spectrum and the color change observed by naked-eyes. Graphical abstract: An exTTF-based dual chemosensor for selective and sensitive detection of copper (II) and iron (III) in different signal pathways was prepared. Furthermore, when Fe 3+ existed, Cu 2+ can be detected sequentially by the sensor.