Display options
Share it on

Chemistry. 2015 Mar 16;21(12):4607-13. doi: 10.1002/chem.201405774. Epub 2015 Jan 12.

Viologen-templated arrays of cucurbit[7]uril-modified iron-oxide nanoparticles.

Chemistry (Weinheim an der Bergstrasse, Germany)

Farah Benyettou, Katia Nchimi-Nono, Mustapha Jouiad, Yoann Lalatonne, Irena Milosevic, Laurence Motte, John-Carl Olsen, Na'il Saleh, Ali Trabolsi

Affiliations

  1. New York University Abu Dhabi, Abu Dhabi (United Arab Emirates).

PMID: 25582844 DOI: 10.1002/chem.201405774

Abstract

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.

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: microporosity; self-assembly; solid-state fluorescence; superparamagnetic nanoparticles; surface modification

Publication Types