Synthesis of Bis(imidazole) Metal Complexes and Their Use in Rapid NO Detection and Quantification Devices
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Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
Inorg. Chem., 2014, 53 (24), pp 12809–12821
DOI: 10.1021/ic501765g
Publication Date (Web): November 24, 2014
Copyright © 2014 American Chemical Society
Abstract
To explore the release of nitrogen oxide gases from reaction solutions, we developed a series of colorimetric sensors based on the cis-nitrogen-donating ligand bis(1-methylimidazol-2-yl)phenylmethoxymethane (BIPhMe). The complexes M(BIPhMe)X2, where M is Fe2+ or Co2+and X is Cl–, Br–, or I–, were prepared and structurally and spectroscopically characterized. The reactivity of these complexes toward NO(g) and NO2(g) in solution was explored. These complexes were then incorporated into test strips and syringes to provide devices that can qualitatively, and in the case of the syringes quantitatively, detect NO(g) and NO2(g) in a reaction headspace without additional equipment.
1H NMR spectra of 1–4, qualitative colorimetric responses of methylene chloride solutions of 1–4to NO(g) and NO2(g), IR and ESI-MS spectra of 1–8, full depictions of the asymmetric units of the crystal structures, UV–vis spectra upon the addition of other small molecules, and CIF files. This material is available free of charge via the Internet at http://pubs.acs.org.
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