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Updated: Jun 28, 2026
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Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
Published on: June 30, 2018
Light-driven rotary molecular motors on gold nanoparticles
Michael M Pollard1, Matthijs K J ter Wiel, Richard A van Delden
1Department of Organic and Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|November 15, 2008
Summary
Researchers created light-driven molecular motors on gold nanoparticles. These motors maintain their unidirectional rotation when attached to nanoparticles, enabling controlled molecular movement upon irradiation.
Area of Science:
- Supramolecular Chemistry
- Nanotechnology
- Photochemistry
Background:
- Molecular motors are crucial for nanoscale applications.
- Immobilizing motors on surfaces is key for device development.
- Chiral overcrowded alkenes are a promising class of molecular motors.
Purpose of the Study:
- To synthesize unidirectional rotary molecular motors based on chiral overcrowded alkenes.
- To immobilize these motors onto gold nanoparticles.
- To confirm the motors retain their function after immobilization.
Main Methods:
- Synthesis of chiral overcrowded alkene-based molecular motors.
- Immobilization onto gold nanoparticles using dual anchors.
- Characterization using NMR (¹H, ¹³C), UV/Vis, and CD spectroscopy.
- Synthesis and use of isotopically labeled (²H, ¹³C) derivatives for mechanistic studies.
Main Results:
- Successful synthesis and characterization of the molecular motors.
- Demonstrated preservation of photochemical and thermal properties after attachment to gold nanoparticles.
- Verified the unidirectional rotary cycle of the motors both in solution and immobilized on nanoparticles.
- Confirmed retention of unidirectional rotation on small (approx. 2 nm) gold nanoparticles.
Conclusions:
- Light-driven rotary molecular motors based on chiral overcrowded alkenes can be successfully immobilized on gold nanoparticles.
- The unidirectional rotary motion is maintained after grafting to the nanoparticle surface.
- This system enables controlled unidirectional rotation of molecules relative to nanoparticles under continuous irradiation.
