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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) Chemical structure of tris-monodentatedisk shaped ligand 3 and hexakis-monodentate ligand 4. (b) Schematicrepresentation of complex [Ag3(3)2] shown as its M-helical enantiomer. (c) X-ray structureof complex [Ag3(3)2].197 (d) Schematic representation of the flippingmotion of the rings attached to the disks and subsequent ligand exchangefrom 1-A, 3-E, and 5-C in M to 1-B, 3-F, and 5-Din P. The direction of rotation in the M to P transition is opposite to that of a subsequent P to M′ transition.200 Reprinted with permission from refs (197) and (200). Copyright 2003 and 2004Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
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fig10: (a) Chemical structure of tris-monodentatedisk shaped ligand 3 and hexakis-monodentate ligand 4. (b) Schematicrepresentation of complex [Ag3(3)2] shown as its M-helical enantiomer. (c) X-ray structureof complex [Ag3(3)2].197 (d) Schematic representation of the flippingmotion of the rings attached to the disks and subsequent ligand exchangefrom 1-A, 3-E, and 5-C in M to 1-B, 3-F, and 5-Din P. The direction of rotation in the M to P transition is opposite to that of a subsequent P to M′ transition.200 Reprinted with permission from refs (197) and (200). Copyright 2003 and 2004Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Mentions: The sandwich-shaped trinuclear silver(I) complex [Ag3(3)2] (Figure 10) developed by Shionoya and co-workers197−199 is an example of a different type of a rotational device. The complexconsists of two disk-shaped ligands, 3, consisting ofthree thiazolyl or 2-pyridyl ligands and three p-tolylgroups attached to a central benzene ring. The three p-tolyl groups force the neighboring ligands to adopt a nonplanararrangement with respect to the central aromatic ring, and make thecoordination sites more accessible for silver(I) cations. The exteriorrings tilt at 30° in the same sense and thus form helical structureswith P and M geometries. A changefrom P to M helicity, and vice versa,was induced by 120° relative rotation of the ligand in thesecomplexes (Figure 10). These observations were further studied using a heterotopic system[Ag3(3)(4)] consisting of a hexa-monodentateligand 4 and a tris-monodentate thiazolyl ligand 3, which complex three silver(I) cations.200 In the case of the hexa-monodentate thiazolyl ligand 4, only every second ring is coordinated to a silver cation.Correlated flipping motion of the coordinating rings (and ligand exchange)results in the conversion from M to P and a 60° rotation of the two disks (Figure 10d).


Artificial Molecular Machines.

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

(a) Chemical structure of tris-monodentatedisk shaped ligand 3 and hexakis-monodentate ligand 4. (b) Schematicrepresentation of complex [Ag3(3)2] shown as its M-helical enantiomer. (c) X-ray structureof complex [Ag3(3)2].197 (d) Schematic representation of the flippingmotion of the rings attached to the disks and subsequent ligand exchangefrom 1-A, 3-E, and 5-C in M to 1-B, 3-F, and 5-Din P. The direction of rotation in the M to P transition is opposite to that of a subsequent P to M′ transition.200 Reprinted with permission from refs (197) and (200). Copyright 2003 and 2004Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
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getmorefigures.php?uid=PMC4585175&req=5

fig10: (a) Chemical structure of tris-monodentatedisk shaped ligand 3 and hexakis-monodentate ligand 4. (b) Schematicrepresentation of complex [Ag3(3)2] shown as its M-helical enantiomer. (c) X-ray structureof complex [Ag3(3)2].197 (d) Schematic representation of the flippingmotion of the rings attached to the disks and subsequent ligand exchangefrom 1-A, 3-E, and 5-C in M to 1-B, 3-F, and 5-Din P. The direction of rotation in the M to P transition is opposite to that of a subsequent P to M′ transition.200 Reprinted with permission from refs (197) and (200). Copyright 2003 and 2004Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Mentions: The sandwich-shaped trinuclear silver(I) complex [Ag3(3)2] (Figure 10) developed by Shionoya and co-workers197−199 is an example of a different type of a rotational device. The complexconsists of two disk-shaped ligands, 3, consisting ofthree thiazolyl or 2-pyridyl ligands and three p-tolylgroups attached to a central benzene ring. The three p-tolyl groups force the neighboring ligands to adopt a nonplanararrangement with respect to the central aromatic ring, and make thecoordination sites more accessible for silver(I) cations. The exteriorrings tilt at 30° in the same sense and thus form helical structureswith P and M geometries. A changefrom P to M helicity, and vice versa,was induced by 120° relative rotation of the ligand in thesecomplexes (Figure 10). These observations were further studied using a heterotopic system[Ag3(3)(4)] consisting of a hexa-monodentateligand 4 and a tris-monodentate thiazolyl ligand 3, which complex three silver(I) cations.200 In the case of the hexa-monodentate thiazolyl ligand 4, only every second ring is coordinated to a silver cation.Correlated flipping motion of the coordinating rings (and ligand exchange)results in the conversion from M to P and a 60° rotation of the two disks (Figure 10d).

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

No MeSH data available.