Magnetic Decoupling of Surface Fe3+ in Magnetite Nanoparticles upon Nitrocatechol-Anchored Dispersant Binding

Magnetic Decoupling of Surface Fe3+ in Magnetite Nanoparticles upon Nitrocatechol-Anchored Dispersant Binding

Bind and distort: NitroDOPA, an anchor shown to irreversibly couple dispersants and functional groups to superparamagnetic Fe3O4 nanoparticles, can magnetically decouple Fe3+ in a nanoparticle surface layer. The strong binding of nitroDOPA distorts the Fe3+ ligand field. This ESR finding sheds light...

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Veröffentlicht in:Chemistry : a European journal 2011-06, Vol.17 (27), p.7396-7398
Hauptverfasser: Amstad, Esther, Fischer, Håkon, Gehring, Andreas U., Textor, Marcus, Reimhult, Erik
Format: Artikel
Sprache:eng
Schlagworte:
Catechols - chemistry
Chemistry
ESR spectroscopy
Ferrosoferric Oxide - chemistry
magnetic properties
Magnetics
Molecular Structure
nanoparticle stabilization
Nanoparticles - chemistry
Nitro Compounds - chemistry
nitrocatechol
Surface Properties
surfactants
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Zusammenfassung:Bind and distort: NitroDOPA, an anchor shown to irreversibly couple dispersants and functional groups to superparamagnetic Fe3O4 nanoparticles, can magnetically decouple Fe3+ in a nanoparticle surface layer. The strong binding of nitroDOPA distorts the Fe3+ ligand field. This ESR finding sheds light on an important binding mechanism of anchors used for nanoparticle surface modification (see graphic).
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201003504