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Artificial Molecular Machines.

Erbas-Cakmak S, Leigh DA, McTernan CT, Nussbaumer AL - Chem. Rev. (2015)

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Affiliation: School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom.

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bonded molecules and on catenanes and rotaxanes in which switching of other protic solvents... This effect (listed in descending binding ability) stations on the thread, macrocycle In these systems, fast-responding reporters are preferred... practical applications by utilizing molecular scale changes to create macroscopic effects... The thread of these rotaxanes included an anthracene fluorophore similar application in synthetic polymers often furnishes a useful result... of Brownian motion can be exploited to great effect in the synthesis every aspect of functional molecule and materials design... An improved robotics” in which ratcheted motions of molecular components

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(a) Kelly’s ratchet-and-pawl 10. (b) Enthalpychange on rotation of helicene. Reprinted with permission from ref (212). Copyright 1997 Wiley-VCHVerlag GmbH & Co. KGaA, Weinheim.
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fig12: (a) Kelly’s ratchet-and-pawl 10. (b) Enthalpychange on rotation of helicene. Reprinted with permission from ref (212). Copyright 1997 Wiley-VCHVerlag GmbH & Co. KGaA, Weinheim.

Mentions: Kelly and co-workers reportedan attempt to create a Feynman adiabaticratchet-and-pawl.212−214 The design utilized a helicene pawl whoseinherent helical chirality was intended to bias the rotation of thetriptycene cog. Although this design realizes an asymmetric potentialenergy surface, 1H NMR showed no directional bias withequal rates of rotation in both directions. This is in line with Feynman’sthought experiment215 and illustrates thatthe rate of rotation depends solely on transition state energy andtemperature, and not on the shape of the barrier to rotation. Statefunctions, for example, free energy, do not depend on the system’shistory (Figure 12).


Artificial Molecular Machines.

Erbas-Cakmak S, Leigh DA, McTernan CT, Nussbaumer AL - Chem. Rev. (2015)

(a) Kelly’s ratchet-and-pawl 10. (b) Enthalpychange on rotation of helicene. Reprinted with permission from ref (212). Copyright 1997 Wiley-VCHVerlag GmbH & Co. KGaA, Weinheim.
© Copyright Policy
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC4585175&req=5

fig12: (a) Kelly’s ratchet-and-pawl 10. (b) Enthalpychange on rotation of helicene. Reprinted with permission from ref (212). Copyright 1997 Wiley-VCHVerlag GmbH & Co. KGaA, Weinheim.
Mentions: Kelly and co-workers reportedan attempt to create a Feynman adiabaticratchet-and-pawl.212−214 The design utilized a helicene pawl whoseinherent helical chirality was intended to bias the rotation of thetriptycene cog. Although this design realizes an asymmetric potentialenergy surface, 1H NMR showed no directional bias withequal rates of rotation in both directions. This is in line with Feynman’sthought experiment215 and illustrates thatthe rate of rotation depends solely on transition state energy andtemperature, and not on the shape of the barrier to rotation. Statefunctions, for example, free energy, do not depend on the system’shistory (Figure 12).

View Article: PubMed Central - PubMed

Affiliation: School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom.

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

bonded molecules and on catenanes and rotaxanes in which switching of other protic solvents... This effect (listed in descending binding ability) stations on the thread, macrocycle In these systems, fast-responding reporters are preferred... practical applications by utilizing molecular scale changes to create macroscopic effects... The thread of these rotaxanes included an anthracene fluorophore similar application in synthetic polymers often furnishes a useful result... of Brownian motion can be exploited to great effect in the synthesis every aspect of functional molecule and materials design... An improved robotics” in which ratcheted motions of molecular components

No MeSH data available.