A highly sensitive and selective naked-eye probe for detection of Fe3+ based on a 2,5-bis[3-benzyl-2-methylbenzothiazole]-croconaine

摘要

A highly sensitive and selective naked-eye probe, 2,5-bis[3-benzy1-2-methylbenzothiazole]-croconaine (BMC) for sensing of Fe3+ was synthesized and characterized. The BMC can selectively recognize Fe3+,,,,, among the test cations (Ni2+, Mg2+, Cu2+, Ca2+, Na+, K+, Cr3+, Ag+, Ba2+ zn(2+) pb(2+) Ai(3+) Fe3+ Cd2+, Co2+) in DMF/H2O (4:1, v/v). The binding constant of BMC-Fe3+ was evaluated by using BenesiHildebrand plot. Simultaneously, the binding mode of BMC-Fe3+ was supporting by Job's plot, ESI-MS, FT-IR and H-1 NMR. Correspondingly, the morphology of chelate complex was investigated by FESEM. Moreover, Fe3+ and EDTA could be employed as inputs and the fluorescence emission intensity which was 816 nm as output so that a molecular logic gate could be realized. (C) 2017 Elsevier Ltd. All rights reserved.