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A benzimidazolyl terpyridine-Fe2+ system and its recognition driven molecular model of a traffic light

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Abstract

A new benzimidazolyl terpyridyl ligand (BIT) selectively detects Fe2+, F and CN ions in acetonitrile. The Fe2+ complex [Fe(H-BIT)2]·(ClO4)4 (1) displays the fast and selective detection of 2,4,6-trinitrophenol (TNP) with strong binding (log β = 8.51 ± 0.24) and a low limit of detection (1.4 × 10−7 M) among several nitroaromatics. The color of complex 1 changes from purple to red, yellow, and green upon the separate addition of 2,4,6-trinitrophenol and tetrabutylammonium salts of fluoride and cyanide, respectively. The overall color changes thus display a model of a traffic light. The structures of BIT, 1 and [Fe(BIT)2]·(TNP)2 (2) have been well characterized using spectroscopic techniques and single crystal X-ray crystallography.

Graphical abstract: A benzimidazolyl terpyridine-Fe2+ system and its recognition driven molecular model of a traffic light

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Publication details

The article was received on 12 Sep 2018, accepted on 26 Nov 2018 and first published on 27 Nov 2018


Article type: Paper
DOI: 10.1039/C8DT03690J
Citation: Dalton Trans., 2019, Advance Article
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    A benzimidazolyl terpyridine-Fe2+ system and its recognition driven molecular model of a traffic light

    A. K. Sonkar, A. Rai, K. Tripathi, P. Sharma, H. W. Roesky, M. G. B. Drew and L. Mishra, Dalton Trans., 2019, Advance Article , DOI: 10.1039/C8DT03690J

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