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Issue 7, 2020
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Rotaxane PtII-complexes: mechanical bonding for chemically robust luminophores and stimuli responsive behaviour

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Abstract

We report an approach to rotaxanes in which the metal ion of a cyclometallated PtII luminophore is embedded in the space created by the mechanical bond. Our results show that the interlocked ligand environment stabilises a normally labile PtII–triazole bond against displacement by competing ligands and that the crowded environment of the mechanical bond retards oxidation of the PtII centre, without perturbing the photophysical properties of the complex. When an additional pyridyl binding site is included in the axle, the luminescence of the PtII centre is quenched, an effect that can be selectively reversed by the binding of AgI. Our results suggest that readily available interlocked metal-based phosphors can be designed to be stimuli responsive and have advantages as stabilised triplet harvesting dopants for device applications.

Graphical abstract: Rotaxane PtII-complexes: mechanical bonding for chemically robust luminophores and stimuli responsive behaviour

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Supplementary files

Article information


Submitted
01 Nov 2019
Accepted
02 Jan 2020
First published
02 Jan 2020

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2020,11, 1839-1847
Article type
Edge Article

Rotaxane PtII-complexes: mechanical bonding for chemically robust luminophores and stimuli responsive behaviour

Z. Zhang, G. J. Tizzard, J. A. G. Williams and S. M. Goldup, Chem. Sci., 2020, 11, 1839
DOI: 10.1039/C9SC05507J

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