Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
74471 | Microporous and Mesoporous Materials | 2011 | 7 Pages |
A new mesoporous polymer constituting of Fe(III)-poly-(p-phenylenediamine) (Fe-MPPD) has been synthesized by using the supramolecular assembly of anionic surfactant sodium dodecylsulphate (SDS) as template under mild conditions. The polymeric framework resulted via simultaneous oxidative polymerization of p-phenylenediamine (PPD) and cross-linking in the presence of Fe(III) ion using water as reaction medium. Upon removal of template SDS molecules through solvent extraction this material has retained the 2D-hexagonal nanostructure. The presence of Fe(III) in the polymeric material has been confirmed by atomic absorption spectroscopy (AAS, 18.3 and 10.2 wt% for two samples) and 57Fe Mössbauer spectroscopy. The temperature dependence of zero-field cooled magnetization showed spin freezing temperature at 3.5 K, below which there is a large coercivity due to significant contribution of surface anisotropy. The porosity and the magnetic property of the material are found to be dependent on the molar ratio Fe(III):PPD and SDA content.
Graphical abstractFe(III)-containing new mesoporous polymer (Fe-MPPD) has been synthesized through simultaneous oxidative polymerization of p-phenylenediamine (PPD) and cross-linking via Fe3+ coordination in the presence of an anionic surfactant SDS as template and this material showed large magnetic anisotropy.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Polymerization of p-phenylenediamine in the presence of surfactant. ► New Fe(III)-containing mesoporous polymer Fe-MPPD. ► Mesoporous Fe3+ coordinated cross-linked polymer. ► Mesophase and surface area for Fe-MPPD. ► Magnetic anisotropy in Fe(III)-containing porous coordination polymer.