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Cyclodextrin-Based Rotaxanes on Gold Nanoparticles
Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
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; in revised form: 28 July 2012 / Accepted: 3 August 2012 / Published: 14 August 2012
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-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.
Keywords: azobenzene; complexation; cyclodextrin; gold nanoparticle; rotaxane
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Cite This Article
MDPI and ACS Style
Zhu, L.; Yan, H.; Zhao, Y. Cyclodextrin-Based Rotaxanes on Gold Nanoparticles. Int. J. Mol. Sci. 2012, 13, 10132-10142.
Zhu L, Yan H, Zhao Y. Cyclodextrin-Based Rotaxanes on Gold Nanoparticles. International Journal of Molecular Sciences. 2012; 13(8):10132-10142.
Zhu, Liangliang; Yan, Hong; Zhao, Yanli. 2012. "Cyclodextrin-Based Rotaxanes on Gold Nanoparticles." Int. J. Mol. Sci. 13, no. 8: 10132-10142.