Triple channel sensing of Pb(II) ions by a simple multiresponsive ferrocene receptor having a 1-deazapurine backbone.
A new redox, chromogenic, and fluorescent chemosensor molecule based on a deazapurine ring selectively senses aqueous Pb2+ in acetonitrile over other metal ions examined: redox shift (DeltaE1/2 = 0.15 V of the Fe(II)/Fe(III) redox couple), the colorless to orange color change, and an emission change of 620-fold, with an unprecedented detection limit of 2.7 microg L-1. The signal transduction occurs via a reversible CHEF with this inherent quenching metal ion.
Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain.
Fabiola
F
Zapata
Antonio
A
Caballero
Arturo
A
Espinosa
Alberto
A
Tarraga
Pedro
P
Molina
D003124:Colorimetry / Q000379:methods; D005296:Ferrous Compounds / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D007854:Lead / Q000032:analysis* / Q000737:chemistry; D000075163:Metallocenes; D008956:Models, Chemical; D015394:Molecular Structure; D010084:Oxidation-Reduction; D011687:Purines / Q000737:chemistry*; D015398:Signal Transduction
D005296:Ferrous Compounds; D005456:Fluorescent Dyes; D000075163:Metallocenes; D011687:Purines; C064191:1H-imidazo(4,5-b)pyridine; D007854:Lead; C004998:ferrocene