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Viologen‐Templated Arrays of Cucurbit[7]uril‐Modified Iron‐Oxide Nanoparticles
Author(s) -
Benyettou Farah,
Nchimio Katia,
Jouiad Mustapha,
Lalatonne Yoann,
Milosevic Irena,
Motte Laurence,
Olsen JohnCarl,
Saleh Na'il,
Trabolsi Ali
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201405774
Subject(s) - viologen , cucurbituril , nanoparticle , iron oxide nanoparticles , supramolecular chemistry , molecule , magnetic nanoparticles , chemistry , fluorescence , iron oxide , nanotechnology , self assembly , adsorption , materials science , chemical engineering , inorganic chemistry , photochemistry , organic chemistry , physics , quantum mechanics , engineering
Magnetic and fluorescent assemblies of iron‐oxide nanoparticles (NPs) were constructed by threading a viologen‐based ditopic ligand, DPV 2+ , into the cavity of cucurbituril (CB[7]) macrocycles adsorbed on the surface of the NPs. Evidence for the formation of 1:2 inclusion complexes that involve DPV 2+ and two CB[7] macrocycles was first obtained in solution by 1 H NMR and emission spectroscopy. DPV 2+ was found to induce self‐assembly of nanoparticle arrays (DPV 2+ ⊂CB[7]NPs) by bridging CB[7] molecules on different NPs. The resulting viologen‐crosslinked iron‐oxide nanoparticles exhibited increased saturation magnetization and emission properties. This facile supramolecular approach to NP self‐assembly provides a platform for the synthesis of smart and innovative materials that can achieve a high degree of functionality and complexity and that are needed for a wide range of applications.