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Artificial Molecular Machines.

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

View Article: PubMed Central - PubMed

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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Proton gradient established by spiropyran (165) shuttlingupon differential illumination of the two sides of a membrane. Reprintedwith permission from ref (1809). Copyright 2014 Nature Publishing Group.
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fig70: Proton gradient established by spiropyran (165) shuttlingupon differential illumination of the two sides of a membrane. Reprintedwith permission from ref (1809). Copyright 2014 Nature Publishing Group.

Mentions: Active transport betweenaqueous phases across an organic phase,1781−1783 and lipid bilayers,1784 has been observed,driven by differing redox potentials in each aqueous phase. An electrondonor–acceptor molecule has been directionally inserted intoa lipid bilayer, which on irradiation created a redox potential gradientand ferried protons across the bilayer establishing a pH gradient.However, the quantum yield for the process was only 0.004.1785 Calcium ions have been transported acrossa membrane in a similar system.1786 Workto establish longer lived photoinduced charge separated states, whichmight lead to greater quantum yields and further applications, hascontinued.627,1787−1807 Alternating currents have been induced in a protein-based photoelectrochemicalcell by irradiation with intermittent light.1808 An interesting recent example utilized the light-inducedring-opening of spiropyrans under ultraviolet light and their ringclosure under visible light illumination. When a membrane doped withspiropyran 165 was illuminated with ultraviolet lighton one side and visible light on the other, the differing proton affinitiesof ring-opened and ring-closed spiropyran led to proton shuttlingacross the membrane and the generation of an electric potential ofca. 210 mV and pH gradient of ca. 3.6 pH units (Figure 70).1809


Artificial Molecular Machines.

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

Proton gradient established by spiropyran (165) shuttlingupon differential illumination of the two sides of a membrane. Reprintedwith permission from ref (1809). Copyright 2014 Nature Publishing Group.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4585175&req=5

fig70: Proton gradient established by spiropyran (165) shuttlingupon differential illumination of the two sides of a membrane. Reprintedwith permission from ref (1809). Copyright 2014 Nature Publishing Group.
Mentions: Active transport betweenaqueous phases across an organic phase,1781−1783 and lipid bilayers,1784 has been observed,driven by differing redox potentials in each aqueous phase. An electrondonor–acceptor molecule has been directionally inserted intoa lipid bilayer, which on irradiation created a redox potential gradientand ferried protons across the bilayer establishing a pH gradient.However, the quantum yield for the process was only 0.004.1785 Calcium ions have been transported acrossa membrane in a similar system.1786 Workto establish longer lived photoinduced charge separated states, whichmight lead to greater quantum yields and further applications, hascontinued.627,1787−1807 Alternating currents have been induced in a protein-based photoelectrochemicalcell by irradiation with intermittent light.1808 An interesting recent example utilized the light-inducedring-opening of spiropyrans under ultraviolet light and their ringclosure under visible light illumination. When a membrane doped withspiropyran 165 was illuminated with ultraviolet lighton one side and visible light on the other, the differing proton affinitiesof ring-opened and ring-closed spiropyran led to proton shuttlingacross the membrane and the generation of an electric potential ofca. 210 mV and pH gradient of ca. 3.6 pH units (Figure 70).1809

View Article: PubMed Central - PubMed

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

AUTOMATICALLY GENERATED EXCERPT
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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

No MeSH data available.