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Synthesis and studies of water-soluble Prussian Blue-type nanoparticles into chitosan beads (Articolo in rivista)

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Synthesis and studies of water-soluble Prussian Blue-type nanoparticles into chitosan beads (Articolo in rivista) (literal)

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Folch, Benjamin; Larionova, Joulia; Guari, Yannick; Molvinger, Karine; Luna, Carlos; Sangregorio, Claudio; Innocenti, Claudia; Caneschi, Andrea; Guerin, Christian (2010)
Synthesis and studies of water-soluble Prussian Blue-type nanoparticles into chitosan beads
in PCCP. Physical chemistry chemical physics (Print); ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE,, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND (Regno Unito)
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Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Folch, Benjamin; Larionova, Joulia; Guari, Yannick; Molvinger, Karine; Luna, Carlos; Sangregorio, Claudio; Innocenti, Claudia; Caneschi, Andrea; Guerin, Christian (literal)

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[Folch, Benjamin; Larionova, Joulia; Guari, Yannick; Guerin, Christian] Univ Montpellier 2, Inst Charles Gerhardt Montpellier, UMR 5253, CNRS UM2 ENSCM UM1, F-34095 Montpellier 5, France. [Molvinger, Karine] ENSCM, Inst Charles Gerhardt Montpellier, UMR 5253, CNRS UM2 UM1, F-34296 Montpellier, France. [Sangregorio, Claudio] CNR ISTM Milano, I-20133 Milan, Italy. [Luna, Carlos; Sangregorio, Claudio; Innocenti, Claudia; Caneschi, Andrea] Univ Florence, INSTM Res Unit Dipartimento Chim, I-50019 Florence, Italy. (literal)

Titolo

Synthesis and studies of water-soluble Prussian Blue-type nanoparticles into chitosan beads (literal)

Abstract

A new approach to the synthesis of highly stable aqueous colloids of coordination polymer nanoparticles was developed by using water-soluble chitosan beads as template and as stabilizing agent. The method consists in the synthesis of nanocomposite beads containing cyano-bridged coordination polymer nanoparticles via step-by-step coordination of the metal ions and the hexacyanometallate precursors into the chitosan pores and then water solubilization of these as-obtained nanocomposite beads. We obtain a large range of M2+/[M'(CN)(6)](3-)/chitosan (where M2+ = Ni2+, Cu2+, Fe2+, Co2+, Mn2+ and M' = Fe3+ and Cr3+) nanocomposite beads and their respective aqueous colloids containing coordination polymer core/chitosan shell nanoparticles. The nanocomposite beads and the corresponding aqueous colloids were studied by Infrared (IR) and UV-Vis spectroscopy, nitrogen sorption (BET), Transmission Electron Microscopy (TEM), High Resolution Transmission Electron Microscopy (HRTEM) and magnetic analyses, which reveal the presence of homogeneously dispersed uniformly-sized cyano-bridged coordination polymer nanoparticles. The detailed studies of the static and dynamic magnetic properties of these nanoparticles show the occurrence of a spin-glass like behavior presumably produced by intra-particle spin disorder due to the low spin exchange energy characterizing these materials. (literal)

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