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Issue 39, 2010
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Synthesis and studies of water-soluble Prussian Blue-type nanoparticles into chitosan beads

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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.

Graphical abstract: Synthesis and studies of water-soluble Prussian Blue-type nanoparticles into chitosan beads

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Supplementary files

Article information


Submitted
04 Feb 2010
Accepted
29 Jun 2010
First published
27 Aug 2010

Phys. Chem. Chem. Phys., 2010,12, 12760-12770
Article type
Paper

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

B. Folch, J. Larionova, Y. Guari, K. Molvinger, C. Luna, C. Sangregorio, C. Innocenti, A. Caneschi and C. Guérin, Phys. Chem. Chem. Phys., 2010, 12, 12760
DOI: 10.1039/C002432E

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