title: Ion pair recognition receptor based on an unsymmetrically 1,1'-disubstituted ferrocene-triazole derivative.
abstract: The ferrocene-triazole derivative 4, available from 1,1'-bis(diazido)ferrocene by sequential functionalization through click-type chemistry and the Staudinger reaction, is elaborated as a lab-on-a-molecule for the selective sensing of HP(2)O(7)(3-) and Hg(2+). Receptor 4 behaves as a ratiometric fluorescent probe for HP(2)O(7)(3-) with a good selectivity over other anions, whereas in the presence of Hg(2+) it modifies the fluorescent emission of the pyrene unit, acting as a selective on-off fluorescent sensor for Hg(2+) with a low detection limit. The most salient feature of compound 4 is its behavior as an excellent electrooptical ion pair recognition receptor able to simultaneously recognize Pb(2+) cations in the presence of HP(2)O(7)(3-) anion through multichannel perturbations of the redox potential of the ferrocene unit, the emission spectrum, and a noticeable color change from yellow to green.
authors.affiliation: Departamento de Química Orgánica, Facultad de Química Campus de Espinardo, Universidad de Murcia, E-30100 Murcia, Spain. franoton@um.es
authors.forename: Francisco
authors.initials: F
authors.lastname: Otón
authors.forename: María del Carmen
authors.initials: Mdel C
authors.lastname: González
authors.forename: Arturo
authors.initials: A
authors.lastname: Espinosa
authors.forename: Carmen
authors.initials: C
authors.lastname: Ramírez de Arellano
authors.forename: Alberto
authors.initials: A
authors.lastname: Tárraga
authors.forename: Pedro
authors.initials: P
authors.lastname: Molina
mesh_terms: D004563:Electrochemistry; D005296:Ferrous Compounds / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D007477:Ions / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D000075163:Metallocenes; D013056:Spectrophotometry, Ultraviolet; D014230:Triazoles / Q000737:chemistry*
chemical_list: D005296:Ferrous Compounds; D005456:Fluorescent Dyes; D007477:Ions; D000075163:Metallocenes; D014230:Triazoles; C004998:ferrocene