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Modeling Pt2+ coordination process within poly(amidoamine) dendrimers for synthesis of dendrimer-encapsulated Pt nanoparticles / Daigo Yamamoto in Industrial & engineering chemistry research, Vol. 50 N° 12 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp. 7332-7337 Titre : Modeling Pt2+ coordination process within poly(amidoamine) dendrimers for synthesis of dendrimer-encapsulated Pt nanoparticles Type de document : texte imprimé Auteurs : Daigo Yamamoto, Auteur ; Satoshi Watanabe, Auteur ; Minoru T. Miyahara, Auteur Année de publication : 2011 Article en page(s) : pp. 7332-7337 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : 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 [article] Modeling Pt2+ coordination process within poly(amidoamine) dendrimers for synthesis of dendrimer-encapsulated Pt nanoparticles [texte imprimé] / Daigo Yamamoto, Auteur ; Satoshi Watanabe, Auteur ; Minoru T. Miyahara, Auteur . - 2011 . - pp. 7332-7337. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp. 7332-7337 Mots-clés : 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