Abstract
Magnetic and fluorescent assemblies of iron-oxide nanoparticles (NPs) were constructed by threading a violo-gen-based ditopic ligand, DPV2+ , 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 DPV2+ and two CB[7] macrocycles was first obtained in solution by 1H NMR and emission spectroscopy. DPV2+ was found to induce self-assembly of nanoparticle arrays (DPV2 + ⊂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.
Original language | English (US) |
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Pages (from-to) | 4607-4613 |
Number of pages | 7 |
Journal | Chemistry - A European Journal |
Volume | 21 |
Issue number | 12 |
DOIs | |
State | Published - Mar 16 2015 |
Keywords
- Microporosity
- Self-assembly
- Solid-state fluorescence
- Superparamagnetic nanoparticles
- Surface modification
ASJC Scopus subject areas
- General Chemistry
- Catalysis
- Organic Chemistry