Sentences with word «rotaxane»
scientificamerican.com
To make their device, the team laid down a tightly packed series of 400 parallel silicon wires (separated by just 33 nanometers) and coated them with a layer of barbell - shaped [2] rotaxane molecules.
Organic chemist David Leigh of the University of Edinburgh, U.K., and colleagues had previously discovered that they could slow the spin of rotaxane rotors 1000-fold with oscillating electric fields, which apparently polarize and strengthen the weak hydrogen bonds holding a ring to its thread.
A decade later in 1991, Fraser Stoddart and his colleagues had pioneered another family of molecular machines called rotaxanes in which ring shaped molecules could be guided remotely to different points along a molecular axle.
Among his developments based on rotaxanes are a molecular lift, a molecular muscle and a molecule - based computer chip.
Different wavelengths of light should trigger this effect in different rotaxanes, he adds, allowing scientists to customize the system for different chemical setups.
The cogs in question are molecules known as rotaxanes, in which rings of organic chemicals revolve around linear threads.
We report on the active template synthesis of a [2] rotaxane through a Goldberg copper - catalyzed C - N bond forming reaction.
Goldberg Active Template Synthesis of a [2] Rotaxane Ligand for Asymmetric Transition - Metal Catalysis.
One of the earliest posts on this blog pointed to commentary by Feringa in Nature «In control of molecular motion», which included commentary on Prof. Sauvage's work on molecular muscles implemented by contraction and stretching of a linear rotaxane dimer.
And selfassembled molecules called rotaxanes, which can act as molecular switches that oscillate back and forth between two stable states, hold promise as switches in future molecular - based computers.
A few years after he began working on rotaxanes — work recognized by the Nobel this year — J. Fraser Stoddart, then at the University of Birmingham, spoke in 1995 at the Fourth Foresight Conference on Molecular Nanotechnology on «The Art and Science of Self - Assembling Molecular Machines ``.
We report on the use of the hydrogen bond acceptor properties of some phosphorus - containing functional groups for the assembly of a series of [2] rotaxanes.
Related sites David Leigh's site Illustrations of rotaxanes from Harry Gibson's group Rotaxane picture gallery
The second step was taken by Fraser Stoddart in 1991, when he developed a rotaxane.