title: A ferrocene-quinoxaline derivative as a highly selective probe for colorimetric and redox sensing of toxic mercury(II) cations.
abstract: A new chemosensor molecule 3 based on a ferrocene-quinoxaline dyad recognizes mercury (II) cations in acetonitrile solution. Upon recognition, an anodic shift of the ferrocene/ferrocenium oxidation peaks and a progressive red-shift (Δλ=140 nm) of the low-energy band, are observed in its absorption spectrum. This change in the absorption spectrum is accompanied by a colour change from orange to deep green, which can be used for a "naked-eye" detection of this metal cation.
authors.affiliation: Departamento de Quimica Organica, Facultad de Quimica, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain. fazafer@um.es
authors.forename: Fabiola
authors.initials: F
authors.lastname: Zapata
authors.forename: Antonio
authors.initials: A
authors.lastname: Caballero
authors.forename: Pedro
authors.initials: P
authors.lastname: Molina
authors.forename: Alberto
authors.initials: A
authors.lastname: Tarraga
mesh_terms: D000042:Absorption; D015374:Biosensing Techniques / Q000295:instrumentation*; D003124:Colorimetry / Q000295:instrumentation / Q000379:methods; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods; D004785:Environmental Pollutants / Q000032:analysis / Q000633:toxicity; D005296:Ferrous Compounds / Q000032:analysis / Q000737:chemistry* / Q000378:metabolism; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008628:Mercury / Q000032:analysis* / Q000493:pharmacokinetics / Q000633:toxicity; D000075163:Metallocenes; D008954:Models, Biological; D010084:Oxidation-Reduction; D011810:Quinoxalines / Q000737:chemistry* / Q000378:metabolism; D012680:Sensitivity and Specificity; D013379:Substrate Specificity
chemical_list: D004785:Environmental Pollutants; D005296:Ferrous Compounds; D000075163:Metallocenes; D011810:Quinoxalines; C064804:ferrocenium; D008628:Mercury; C004998:ferrocene