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Int. J. Mol. Sci. 2012, 13(8), 10132-10142; doi:10.3390/ijms130810132

Cyclodextrin-Based [1]Rotaxanes on Gold Nanoparticles

1
Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
2
School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
*
Author to whom correspondence should be addressed.
Received: 19 July 2012 / Revised: 28 July 2012 / Accepted: 3 August 2012 / Published: 14 August 2012
(This article belongs to the Section Molecular Recognition)
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Abstract

Transformation of mechanically interlocked molecules (e.g., rotaxanes and catenanes) into nanoscale materials or devices is an important step towards their real applications. In our current work, an azobenzene-modified β-cyclodextrin (β-CD) derivative that can form a self-inclusion complex in aqueous solution was prepared. The self-included β-CD derivative was then functionalized onto a gold nanoparticle (AuNP) surface via a ligand-exchange reaction in aqueous solution, leading to the formation of AuNP-[1]rotaxane hybrids. Corresponding non-self-included β-CD derivative functionalized AuNPs were also developed in a DMF/H2O mixture solution for control experiments. These hybrids were fully characterized by UV-vis and circular dichroism spectroscopies, together with transmission electron microscopy (TEM). The competitive binding behavior of the hybrids with an adamantane dimer was investigated. View Full-Text
Keywords: azobenzene; complexation; cyclodextrin; gold nanoparticle; [1]rotaxane azobenzene; complexation; cyclodextrin; gold nanoparticle; [1]rotaxane
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MDPI and ACS Style

Zhu, L.; Yan, H.; Zhao, Y. Cyclodextrin-Based [1]Rotaxanes on Gold Nanoparticles. Int. J. Mol. Sci. 2012, 13, 10132-10142.

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