Dendrimers and gold nanoparticles as exo-receptors sensing biologically important anions.
Dendrimers, alkylthiol-gold nanoparticles and gold-nanoparticle-cored dendrimers containing tethers terminated by a redox group (typically an iron sandwich) attached to a hydrogen-bonding group (amido, amino, silyl) are selective and efficient exo-receptors for the recognition, sensing and titration of oxo-anions, including ATP(2-), or halogens, mostly using cyclic voltammetry. Various positive dendritic effects were disclosed (in contrast to catalysis), and large gold-nanoparticle-cored redox dendrimers of this type that contain several hundred equivalent ferrocenyl groups readily adsorb on Pt electrodes, providing useful regenerable electrochemical sensors.
Astruc
Didier
D
Nanosciences and Catalysis Group, LCOO, UMR CNRS No. 5802, Université Bordeaux I, 351 Cours de la Liberation, 33405 Talence Cedex, France.
Daniel
Marie-Christine
MC
Ruiz
Jaime
J
D000838:Anions; D015374:Biosensing Techniques; D004563:Electrochemistry; D005296:Ferrous Compounds; D006046:Gold; D000075163:Metallocenes; D049329:Nanostructures; D010084:Oxidation-Reduction
D000838:Anions; D005296:Ferrous Compounds; D000075163:Metallocenes; D006046:Gold; C004998:ferrocene