Assembly between gold-thiolate nanoparticles and the organometallic cluster [Fe(η5-C5H5)(μ3-CO)]4 toward redox sensing of oxo-anions

Covalent assembly between gold-thiolate nanoparticles (AuNPs) and the cluster [Fe(eta(5)-C5H5)(mu(3)-CO)](4), 1, can be achieved either by direct Brust-Schriffin-type synthesis using a mixture of undecanethiol and a thiol functionalized with 1, or by substitution of undecanethiolate ligands in AuNPs by thiolate ligands functionalized with 1; cyclic voltammetry of these AuNPs functionalized with 1 allows us to recognize and titrate the oxo-anions H2PO4- and ATP(2-).