Mechanically interlocked molecules (MIMs), such as catenanes and rotaxanes, have contributed significantly to the development of tunable molecular architectures on scales from the molecular to the nanoscopic levels. Efficient syntheses of rotaxane-nanoparticle hybrids have potential uses in molecular electronic devices (MEDs), molecular switch tunnel junctions (MSTJs), and nanoelectromechanical systems (NEMS). Hexanethiolate (SC6) and glutathione (SG) gold clusters were synthesized and characterized. Ligand exchange reaction was performed in order to place exchange the hexanethiolate(SC6) and glutathione(SG) with a new thiol based Rod(SR) molecule. This hybrid was then further modified with the wheel(W) component of the rotaxane, which is the crown ether ring. The ensuing changes in optical (UV-Vis, Fluorescence, TPA) and electrochemical properties (SWV) will be presented. The engaging-disengaging reaction between the rod and wheel components on the nanoparticle surface will be studied to sense nerve gas mimics. The electron tunneling between the gold core and the molecular switch can be tailored specifically to detect redox active species in solution Figure 1. <img src='https://acs-archive-assets2.s3.amazonaws.com/239nm/uploads/7803_abstract_figure.jpg' alt='' />.

Synthesis and optoelectronic dynamics of supramolecular switches assembled on monolayer protected gold clusters

242nd National Meeting (2011)

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