Supramolecular H-bonded assemblies of redox-active metallodendrimers and positive and unusual dendritic effects on the recognition of H2PO4-.
The DSM polyamine dendrimers dend-DAB-(NH2)x of generations 1 (x = 4) to 4 (x = 32) form H-bonded dendritic assemblies with the phenol AB3 units p-HOC6H4C(CH2CHCH2)3 and p-HOC6H4C{(CH2)3SiCH2NHCOFc}3 (Fc = ferrocenyl), as shown by the shifts of the NH2 and OH signals giving a concentration-dependent common signal between 2.4 and 4.1 ppm in CDCl3. The supramolecular dendrimers efficiently recognize H2PO4- anions with positive and unusual dendritic effects upon electrochemical titration involving half-stoichiometry for G1, a sudden cyclovoltammetry wave change at the equivalent point, and a dramatic intensity decrease of the new wave.
Daniel
Marie-Christine
MC
Groupe Nanosciences Moléculaires et Catalyse, LCOO, UMR CNRS N degrees 5802, Université Bordeaux I, 33405 Talence Cedex, France.
Ruiz
Jaime
J
Astruc
Didier
D
D005296:Ferrous Compounds / Q000737:chemistry*; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy; D000075163:Metallocenes; D010084:Oxidation-Reduction; D010636:Phenols / Q000737:chemistry; D010710:Phosphates / Q000737:chemistry*; D011073:Polyamines / Q000737:chemistry*
D005296:Ferrous Compounds; D000075163:Metallocenes; D010636:Phenols; D010710:Phosphates; D011073:Polyamines; C004998:ferrocene