Light-powered autonomous and directional molecular motion of a dissipative self-assembling system

Ragazzon, Giulio; Baroncini, Massimo; Silvi, Serena; Venturi, Margherita; Credi, Alberto

doi:10.1038/nnano.2014.260

Cited by 410 publications

(321 citation statements)

References 46 publications

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“…In the absence of an energy supply, the four-wheeled molecule would remain anchored to the copper surface in one of these states. A similar paradigm involving the use of light to attain far-from-equilibrium conditions has been reported recently 50 .…”

Section: Review Articlementioning

confidence: 87%

Supramolecular systems chemistry

2015

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The field of supramolecular chemistry focuses on the non-covalent interactions between molecules that give rise to molecular recognition and self-assembly processes. Since most non-covalent interactions are relatively weak and form and break without significant activation barriers, many supramolecular systems are under thermodynamic control. Hence, traditionally, supramolecular chemistry has focused predominantly on systems at equilibrium. However, more recently, self-assembly processes that are governed by kinetics, where the outcome of the assembly process is dictated by the assembly pathway rather than the free energy of the final assembled state, are becoming topical. Within the kinetic regime it is possible to distinguish between systems that reside in a kinetic trap and systems that are far from equilibrium and require a continuous supply of energy to maintain a stationary state. In particular, the latter systems have vast functional potential, as they allow, in principle, for more elaborate structural and functional diversity of self-assembled systems - indeed, life is a prime example of a far-from-equilibrium system. In this Review, we compare the different thermodynamic regimes using some selected examples and discuss some of the challenges that need to be addressed when developing new functional supramolecular systems.

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Section: Review Articlementioning

confidence: 87%

Supramolecular systems chemistry

2015

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“…The same group later reported a change in the structure of the macrocycle which allowed for the spontaneous dethreading of the macrocycle without the need for a competitive guest, enabling the light-powered system to operate under continuous irradiation. 57 Please do not adjust margins…”

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confidence: 99%

Artificial molecular motors

et al. 2017

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Motor proteins are nature's solution for directing movement at the molecular level. The field of artificial molecular motors takes inspiration from these tiny but powerful machines. Although directional motion on the nanoscale performed by synthetic molecular machines is a relatively new development, significant advances have been made. In this review an overview is given of the principal designs of artificial molecular motors and their modes of operation. Although synthetic molecular motors have also found widespread application as (multistate) switches, we focus on the control of directional movement, both at the molecular scale and at larger magnitudes. We identify some key challenges remaining in the field.

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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

354

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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Light-powered autonomous and directional molecular motion of a dissipative self-assembling system

Cited by 410 publications

References 46 publications

Supramolecular systems chemistry

Supramolecular systems chemistry

Artificial molecular motors

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

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