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Issue 38, 2014
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Fast redox-triggered shuttling motions in a copper rotaxane based on a phenanthroline–terpyridine conjugate

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Abstract

Fast shuttling motions in solution have been observed by cyclic voltammetry in a CuI/II-based [2] rotaxane. In the reported system, the different coordination preferences of both copper oxidation states are exploited to promote the electrochemically-triggered gliding of the ring from a tetra to a pentacoordinated site and vice versa. The thread of this rotaxane consists of a tridentate 2,2′:6′,2′′-terpyridine chelating unit directly bonded through its 5-position to the 3-position of the bidentate 1,10-phenanthroline unit. This distribution reduces to a minimum the distance between the two coordination sites and lessens the congestion around the tetrahedral environment. These two factors have been demonstrated to highly increase the kinetics of the switching process. In addition, the electrochemical experiments carried out in different solvent mixtures evidenced the influence of the solvent on the shuttling mechanism.

Graphical abstract: Fast redox-triggered shuttling motions in a copper rotaxane based on a phenanthroline–terpyridine conjugate

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Publication details

The article was received on 11 Jun 2014, accepted on 01 Aug 2014 and first published on 20 Aug 2014


Article type: Paper
DOI: 10.1039/C4OB01206B
Author version available: Download Author version (PDF)
Citation: Org. Biomol. Chem., 2014,12, 7572-7580
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    Fast redox-triggered shuttling motions in a copper rotaxane based on a phenanthroline–terpyridine conjugate

    E. Coronado, P. Gaviña, J. Ponce and S. Tatay, Org. Biomol. Chem., 2014, 12, 7572
    DOI: 10.1039/C4OB01206B

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