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American Chemical Society, Organic Letters, 17(12), p. 3840-3843, 2010

DOI: 10.1021/ol101514y

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Squaramide-Based Reagent for Selective Chromogenic Sensing of Cu(II) through a Zwitterion Radical

Journal article published in 2010 by Elena Sanna, Luis Martínez, Carmen Rotger ORCID, Salvador Blasco ORCID, Jorge González, Enrique García-España, Antoni Costa ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

A minimalist squaramide-based chemodosimeter for Cu(2+) is described. Upon selective chelation to 2, Cu(2+) induces the formation of a highly colored zwitterionic radical, which is kinetically stable for hours. The presence of a radical is confirmed by EPR and ESI-MS. It is then possible to use reagent 2 for visual and selective sensing of Cu(2+) at neutral pH.