| Titre : | Modeling Pt2+ coordination process within poly(amidoamine) dendrimers for synthesis of dendrimer-encapsulated Pt nanoparticles (2011) |
| Auteurs : | Daigo Yamamoto, Auteur ; Satoshi Watanabe, Auteur ; Minoru T. Miyahara, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 50 N° 12, Juin 2011) |
| Article en page(s) : | pp. 7332-7337 |
| Note générale : | Chimie industrielle |
| Langues : | Anglais |
| Tags : | Nanoparticle Modeling |
| Résumé : | Dendrimer-encapsulated Pt nanoparticles can be synthesized by Pt2+ coordination with dendrimers followed by reduction. In the present study, we have systematically investigated the coordination kinetics of PtCl42― with fourth-generation hydroxyl-terminated poly(amidoamine) (PAMAM G4-OH) dendrimers using UV-vis spectroscopy measurements. Our experimental investigation clarifies that Pt2+ coordination with dendrimers occurs after the H2O ligand exchange (aquation) of PtCl42― and that a resultant species PtCl2(H2O)2 predominantly coordinates with the dendrimers. From these results, we have proposed a simple dynamic model that describes the Pt2+ coordination as a consecutive reaction composed of the aquation reaction of PtCl42― and a subsequent coordination reaction of the resultant PtCl2(H2O)2 with the dendrimers. Our proposed model is in good agreement with the experimental results at a low concentration condition of PtCl42―, validating its performance. Furthermore, we suggest that the proposed scheme can be generalized and applied to metal species other than Pt2+. |
| DEWEY : | 660 |
| ISSN : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=24239048 |
