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Rotaxane Pt(II)-complexes : mechanical bonding for chemically robust luminophores and stimuli responsive behaviour.

Zhang, Zhi-Hui and Tizzard, Graham J. and Williams, J. A. Gareth and Goldup, Stephen (2020) 'Rotaxane Pt(II)-complexes : mechanical bonding for chemically robust luminophores and stimuli responsive behaviour.', Chemical science., 7 (11). pp. 1839-1847.

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.

Item Type:Article
Full text:(VoR) Version of Record
Available under License - Creative Commons Attribution.
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Full text:(VoR) Version of Record
Available under License - Creative Commons Attribution.
Download PDF
(797Kb)
Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1039/C9SC05507J
Publisher statement:Open Access Article. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Date accepted:02 January 2020
Date deposited:31 January 2020
Date of first online publication:02 January 2020
Date first made open access:31 January 2020

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