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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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Orthogonal exclusion of an azobenzene and aviologen encapsulatedby CB[8].588
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fig20: Orthogonal exclusion of an azobenzene and aviologen encapsulatedby CB[8].588

Mentions: Extracting work from machines depending solely on supramolecularinteractions would be difficult due to the rapid exchange of boundand unbound guests. However, some supramolecular host–guestsystems are moderately stable and might be suitable for use in theassembly of molecular devices. A methylviologen (compound 50, MV2+) and a trans-azobenzene derivative(compound 51, trans-AB) were encapsulatedby a cucurbit[8]uril (CB[8]) host (Figure 20). Each guest has distinct properties: MV2+ is redox active, and the azobenzene can be isomerized toits cis-form (cis-AB) on irradiation.588 One electron reduction of methylviologen (MV+•) results in a binary encapsulation of the reducedspecies in the host and trans-AB is kicked out. Photoisomerizationof azobenzene to its cis-isomer results in its ejectiondue to steric repulsion. Therefore, the initial heteroternary complexof MV2+, trans-AB, and CB[8] can be orthogonallyswitched to give two distinct complexes. In one complex, one-electronreduction of MV2+ forces out the azobenzene to form a homoternarycomplex (MV+•)2CB[8], while in the otherphotoisomerization of the azobenzene ejects cis-AB,while MV2+ stays encapsulated to form (MV2+)CB[8].


Artificial Molecular Machines.

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

Orthogonal exclusion of an azobenzene and aviologen encapsulatedby CB[8].588
© Copyright Policy
Related In: Results  -  Collection

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

fig20: Orthogonal exclusion of an azobenzene and aviologen encapsulatedby CB[8].588
Mentions: Extracting work from machines depending solely on supramolecularinteractions would be difficult due to the rapid exchange of boundand unbound guests. However, some supramolecular host–guestsystems are moderately stable and might be suitable for use in theassembly of molecular devices. A methylviologen (compound 50, MV2+) and a trans-azobenzene derivative(compound 51, trans-AB) were encapsulatedby a cucurbit[8]uril (CB[8]) host (Figure 20). Each guest has distinct properties: MV2+ is redox active, and the azobenzene can be isomerized toits cis-form (cis-AB) on irradiation.588 One electron reduction of methylviologen (MV+•) results in a binary encapsulation of the reducedspecies in the host and trans-AB is kicked out. Photoisomerizationof azobenzene to its cis-isomer results in its ejectiondue to steric repulsion. Therefore, the initial heteroternary complexof MV2+, trans-AB, and CB[8] can be orthogonallyswitched to give two distinct complexes. In one complex, one-electronreduction of MV2+ forces out the azobenzene to form a homoternarycomplex (MV+•)2CB[8], while in the otherphotoisomerization of the azobenzene ejects cis-AB,while MV2+ stays encapsulated to form (MV2+)CB[8].

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.