Artificial Molecular Machines

Erbaş-Çakmak, Sündüs; Leigh, David A.; McTernan, Charlie T.; Nussbaumer, Alina L.

doi:10.1021/acs.chemrev.5b00146

Cited by 1,687 publications

(1,576 citation statements)

References 1,999 publications

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“…1. The molecule is a [2]catenane featuring two interlocked molecular rings of different sizes. Fumaramide residues (shown in green) on the larger ring (the 'track') serve as binding sites for a smaller benzylic amide macrocycle (blue).…”

Section: Figure 1 | Operation Of a Chemically-fuelled [2]catenane Rotmentioning

confidence: 99%

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An autonomous chemically fuelled small-molecule motor

Wilson

Solà

Carlone

et al. 2016

Nature

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We find that a bulky pyridine-based catalyst promotes carbonate-forming reactions that ratchet the displacement of the macrocycle away from the reactive sites on the track. Under reaction conditions where both attachment and cleavage of the Fmoc groups occur through different processes, and the cleavage reaction occurs at a rate independent of macrocycle location, net directional rotation of the molecular motor continues for as long as unreacted fuel remains. We anticipate that autonomous chemically-fuelled molecular motors will find application as engines for molecular nanotechnology. 2, 19,20

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Section: Figure 1 | Operation Of a Chemically-fuelled [2]catenane Rotmentioning

confidence: 99%

“…We anticipate that autonomous chemically-fuelled molecular motors will find application as engines for molecular nanotechnology. 2, 19,20 …”

mentioning

confidence: 99%

An autonomous chemically fuelled small-molecule motor

Wilson

Solà

Carlone

et al. 2016

Nature

Self Cite

415

438

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“…Although the kinetic evolution of azo‐based LCs can be expedited by the anchoring memory effect in polymer‐stabilized mixture38, 39 or the push–pull effect in glassy elastomer,37, 40, 41 the inherently accelerative isomerization motion is still desirable, causing a variety of attractions to improve the essential action of isomerization compound with particular structures 42, 43, 44…”

Section: Introductionmentioning

confidence: 99%

Stimuli‐Directed Dynamic Reconfiguration in Self‐Organized Helical Superstructures Enabled by Chemical Kinetics of Chiral Molecular Motors

et al. 2017

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Dynamic controllability of self‐organized helical superstructures in spatial dimensions is a key step to promote bottom‐up artificial nanoarchitectures and functional devices for diverse applications in a variety of areas. Here, a light‐driven chiral overcrowded alkene molecular motor with rod‐like substituent is designed and synthesized, and its thermal isomerization reaction exhibits an increasing structural entropy effect on chemical kinetic analysis in anisotropic achiral liquid crystal host than that in isotropic organic liquid. Interestingly, the stimuli‐directed angular orientation motion of helical axes in the self‐organized helical superstructures doped with the chiral motors enables the dynamic reconfiguration between the planar (thermostationary) and focal conic (photostationary) states. The reversible micromorphology deformation processes are compatible with the free energy fluctuation of self‐organized helical superstructures and the chemical kinetics of chiral motors under different conditions. Furthermore, stimuli‐directed reversible nonmechanical beam steering is achieved in dynamic hidden periodic photopatterns with reconfigurable attributes prerecorded with a corresponding photomask and photoinduced polymerization.

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“…[1][2][3][4][5][6] In nature many processes depend on molecular motors that perform specific mechanical tasks in living cells, 7 a prototypical process is the directional motion of myosin. 8 Several synthetic molecular motors have been synthesized, 2,9,10 including a molecular motor developed by Feringa and co-workers that rotates at a frequency in the MHz regime.…”

Section: Introductionmentioning

confidence: 99%

Light-Induced Translation of Motorized Molecules on a Surface

et al. 2016

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Molecular machines are a key component in the vision of molecular nanotechnology, and have the potential to transport molecular species and cargo on surfaces. The motion of such machines should be triggered remotely, ultimately allowing a large number of molecules to be propelled by a single source, with light being an attractive stimulus. Here, we report upon the photo-induced translation of molecular machines across a surface by characterizing single molecules before and after illumination. Illumination of molecules containing a motor unit results in an enhancement in the diffusion of the molecules. The effect vanishes if an incompatible photon energy is used or if the motor unit is removed from the molecule, revealing that the enhanced motion is due to the presence of the wavelength-sensitive motor in each molecule.Molecular machines with internal motors are fascinating objects that transform energy into useful motion at the nanoscale. [1][2][3][4][5][6] In nature many processes depend on molecular motors that perform specific mechanical tasks in living cells, 7 a prototypical process is the directional motion of myosin. 8 Several synthetic molecular motors have been synthesized, 2,9,10 including a molecular motor developed by Feringa and co-workers that rotates at a frequency in the MHz regime. [11][12][13][14] For ultimate control of molecular machines it is essential that the motor exhibits only one sense of rotation, resulting in unidirectional translation of the molecular machine on a surface, thus only forward and no backward motion, in contrast to random motion in all directions. 2 For synthetic molecular machines to contribute to the vision of nanotechnology by transporting molecular species and cargo on surfaces, the motion of

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Artificial Molecular Machines

Abstract: Figure 11. (a) Schematic illustration of a crank mechanism that translates linear motion into rotary motion in cylinder engines. (b) Schematic representation of a molecular crank mechanism. (c) Chemical structure of a synthetic molecular crank 5. 201 Reprinted with permission from ref 201.

Cited by 1,687 publications

References 1,999 publications

An autonomous chemically fuelled small-molecule motor

An autonomous chemically fuelled small-molecule motor

Stimuli‐Directed Dynamic Reconfiguration in Self‐Organized Helical Superstructures Enabled by Chemical Kinetics of Chiral Molecular Motors

Light-Induced Translation of Motorized Molecules on a Surface

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