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Remote Control of the Synthesis of a [2]Rotaxane and its Shuttling via Metal‐Ion Translocation

Remote control in an eight‐component network commanded both the synthesis and shuttling of a [2]rotaxane via metal‐ion translocation, the latter being easily monitored by distinct colorimetric and fluorimetric signals. Addition of zinc(II) ions to the red colored copper‐ion relay station rapidly lib...

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Autores principales: Paul, Indrajit, Ghosh, Amit, Bolte, Michael, Schmittel, Michael
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863578/
https://www.ncbi.nlm.nih.gov/pubmed/31763127
http://dx.doi.org/10.1002/open.201900293
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author Paul, Indrajit
Ghosh, Amit
Bolte, Michael
Schmittel, Michael
author_facet Paul, Indrajit
Ghosh, Amit
Bolte, Michael
Schmittel, Michael
author_sort Paul, Indrajit
collection PubMed
description Remote control in an eight‐component network commanded both the synthesis and shuttling of a [2]rotaxane via metal‐ion translocation, the latter being easily monitored by distinct colorimetric and fluorimetric signals. Addition of zinc(II) ions to the red colored copper‐ion relay station rapidly liberated copper(I) ions and afforded the corresponding zinc complex that was visualized by a bright sky blue fluorescence at 460 nm. In a mixture of all eight components of the network, the liberated copper(I) ions were translocated to a macrocycle that catalyzed formation of a rotaxane by a double‐click reaction of acetylenic and diazide compounds. The shuttling frequency in the copper‐loaded [2]rotaxane was determined to k (298)=30 kHz (ΔH (≠)=62.3±0.6 kJ mol(−1), ΔS (≠)=50.1±5.1 J mol(−1) K(−1), ΔG (≠) (298)=47.4 kJ mol(−1)). Removal of zinc(II) ions from the mixture reversed the system back generating the metal‐free rotaxane. Further alternate addition and removal of Zn(2+) reversibly controlled the shuttling mode of the rotaxane in this eight‐component network where the ion translocation status was monitored by the naked eye.
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spelling pubmed-68635782019-11-22 Remote Control of the Synthesis of a [2]Rotaxane and its Shuttling via Metal‐Ion Translocation Paul, Indrajit Ghosh, Amit Bolte, Michael Schmittel, Michael ChemistryOpen Full Papers Remote control in an eight‐component network commanded both the synthesis and shuttling of a [2]rotaxane via metal‐ion translocation, the latter being easily monitored by distinct colorimetric and fluorimetric signals. Addition of zinc(II) ions to the red colored copper‐ion relay station rapidly liberated copper(I) ions and afforded the corresponding zinc complex that was visualized by a bright sky blue fluorescence at 460 nm. In a mixture of all eight components of the network, the liberated copper(I) ions were translocated to a macrocycle that catalyzed formation of a rotaxane by a double‐click reaction of acetylenic and diazide compounds. The shuttling frequency in the copper‐loaded [2]rotaxane was determined to k (298)=30 kHz (ΔH (≠)=62.3±0.6 kJ mol(−1), ΔS (≠)=50.1±5.1 J mol(−1) K(−1), ΔG (≠) (298)=47.4 kJ mol(−1)). Removal of zinc(II) ions from the mixture reversed the system back generating the metal‐free rotaxane. Further alternate addition and removal of Zn(2+) reversibly controlled the shuttling mode of the rotaxane in this eight‐component network where the ion translocation status was monitored by the naked eye. John Wiley and Sons Inc. 2019-11-19 /pmc/articles/PMC6863578/ /pubmed/31763127 http://dx.doi.org/10.1002/open.201900293 Text en © 2019 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Full Papers
Paul, Indrajit
Ghosh, Amit
Bolte, Michael
Schmittel, Michael
Remote Control of the Synthesis of a [2]Rotaxane and its Shuttling via Metal‐Ion Translocation
title Remote Control of the Synthesis of a [2]Rotaxane and its Shuttling via Metal‐Ion Translocation
title_full Remote Control of the Synthesis of a [2]Rotaxane and its Shuttling via Metal‐Ion Translocation
title_fullStr Remote Control of the Synthesis of a [2]Rotaxane and its Shuttling via Metal‐Ion Translocation
title_full_unstemmed Remote Control of the Synthesis of a [2]Rotaxane and its Shuttling via Metal‐Ion Translocation
title_short Remote Control of the Synthesis of a [2]Rotaxane and its Shuttling via Metal‐Ion Translocation
title_sort remote control of the synthesis of a [2]rotaxane and its shuttling via metal‐ion translocation
topic Full Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863578/
https://www.ncbi.nlm.nih.gov/pubmed/31763127
http://dx.doi.org/10.1002/open.201900293
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