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

Rotaxane PtII-complexes: mechanical bonding for chemically robust luminophores and stimuli responsive behaviour
Rotaxane PtII-complexes: mechanical bonding for chemically robust luminophores and stimuli responsive behaviour
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.
2041-6520
1839-1847
Zhang, Zhihui
57097735-da7b-48b8-a815-b3da868d142e
Tizzard, Graham J.
8474c0fa-40df-43a6-a662-7f3c4722dbf2
Williams, J. A. Gareth
359aaf20-1f2d-4124-9943-f4dc17ef0b52
Goldup, Stephen M.
0a93eedd-98bb-42c1-a963-e2815665e937
Zhang, Zhihui
57097735-da7b-48b8-a815-b3da868d142e
Tizzard, Graham J.
8474c0fa-40df-43a6-a662-7f3c4722dbf2
Williams, J. A. Gareth
359aaf20-1f2d-4124-9943-f4dc17ef0b52
Goldup, Stephen M.
0a93eedd-98bb-42c1-a963-e2815665e937

Zhang, Zhihui, Tizzard, Graham J., Williams, J. A. Gareth and Goldup, Stephen M. (2020) Rotaxane PtII-complexes: mechanical bonding for chemically robust luminophores and stimuli responsive behaviour. Chemical Science, 11 (7), 1839-1847. (doi:10.1039/C9SC05507J).

Record type: Article

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.

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More information

Accepted/In Press date: 2 January 2020
e-pub ahead of print date: 2 January 2020

Identifiers

Local EPrints ID: 437967
URI: http://eprints.soton.ac.uk/id/eprint/437967
ISSN: 2041-6520
PURE UUID: 9ee40541-3bed-48fa-a142-adc09f8dd7b8
ORCID for Graham J. Tizzard: ORCID iD orcid.org/0000-0002-1577-5779
ORCID for Stephen M. Goldup: ORCID iD orcid.org/0000-0003-3781-0464

Catalogue record

Date deposited: 24 Feb 2020 17:32
Last modified: 07 Oct 2020 02:06

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