A chemically powered unidirectional rotary molecular motor based on a palladium redox cycle

Collins, Beatrice S. L.; Kistemaker, Jos C. M.; Otten, Edwin; Feringa, Bernard

doi:10.1038/nchem.2543

Cited by 152 publications

(109 citation statements)

References 32 publications

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“…Directional movement has been demonstrated in artificial molecular machines (1)(2)(3)(4), using photoexcitation (5)(6)(7)(8)(9)(10)(11) and/or the sequential addition of chemical reagents (12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22), and an autonomous chemically-driven molecular rotary motor that operates through a bio-inspired (23) information ratchet mechanism has been described (24,25). Here we report on an alternative class of ratchet mechanism, based on acid-base oscillations, that powers both rotary and linear molecular motors.…”

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confidence: 99%

Rotary and linear molecular motors driven by pulses of a chemical fuel

Erbaş-Çakmak

Fielden

Karaca

et al. 2017

Science

333

274

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Acid fuels the motion of a threaded ring A central goal in the construction of molecular-scale machines is the efficient achievement of one-way motion. Erbas-Cakmak et al. developed a class of machines that transmit pH changes into the two-stage guided motion of molecular rings threaded on a linear or cyclic axle. The design relies on temporary blocking groups and landing sites along the axle that toggle between active and passive states in response to acid or base. Trichloroacetic acid initiates the first stage of motion until it is decomposed by base in the solution, spurring the second phase. Science , this issue p. 340

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confidence: 99%

Rotary and linear molecular motors driven by pulses of a chemical fuel

Erbaş-Çakmak

Fielden

Karaca

et al. 2017

Science

333

274

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“…In that way, the rotary speed of the molecular motor could be reversibly tuned in situ , which is important toward the development of more complex molecular motor and machine-like systems. 3,4 …”

Section: Resultsmentioning

confidence: 99%

Allosteric Regulation of the Rotational Speed in a Light-Driven Molecular Motor

et al. 2016

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The rotational speed of an overcrowded alkene-based molecular rotary motor, having an integrated 4,5-diazafluorenyl coordination motif, can be regulated allosterically via the binding of metal ions. DFT calculations have been used to predict the relative speed of rotation of three different (i.e., zinc, palladium, and platinum) metal dichloride complexes. The photochemical and thermal isomerization behavior of these complexes has been studied in detail using UV–vis and 1H NMR spectroscopy. Our results confirm that metal coordination induces a contraction of the diazafluorenyl lower half, resulting in a reduction of the steric hindrance in the “fjord” region of the molecule, which causes an increase of the rotational speed. Importantly, metal complexation can be accomplished in situ and is found to be reversible upon the addition of a competing ligand. Consequently, the rotational behavior of these molecular motors can be dynamically controlled with chemical additives.

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“…As for molecular motors, Feringa also designed several chemically fuelled covalent rotary motors based on biaryl units, including one in which the one half performs, through a sequence of bond‐breaking and bond‐forming reactions involving a lactone moiety, an oriented 360° rotation with respect to the other half, and another one in which the rotary motion is coupled with a palladium redox cycle …”

Section: Fuels For Natural and Man‐made Molecular Machinesmentioning

confidence: 99%

Abiotic Chemical Fuels for the Operation of Molecular Machines

Biagini¹,

Stefano²

2020

Angewandte Chemie

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Natural molecular machines require a continuous fuel supply to perform motions and/or remain in a functional state. Consequently, the aim of developing artificial devices and materials with life‐type properties has motivated a growing interest in abiotic chemical fuels and in their supply modalities. Many artificial molecular machines have been developed in which the sequential addition of several chemical reagents allows the machine to perform complete cycles of motion. Only recently, examples of molecular machines whose cycles of motion are triggered by a single pulse of fuel have been reported. The latter systems are the object of this Minireview where the abiotic chemical fuels used so far to trigger the complete cycles of motion of molecular machines are described, with particular emphasis on the operation mechanism of the machine/fuel systems.

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A chemically powered unidirectional rotary molecular motor based on a palladium redox cycle

Cited by 152 publications

References 32 publications

Rotary and linear molecular motors driven by pulses of a chemical fuel

Rotary and linear molecular motors driven by pulses of a chemical fuel

Allosteric Regulation of the Rotational Speed in a Light-Driven Molecular Motor

Abiotic Chemical Fuels for the Operation of Molecular Machines

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