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.
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
21 February 2020
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), .
(doi:10.1039/C9SC05507J).
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
Published date: 21 February 2020
Additional Information:
Funding Information:
This work was supported nancially by the China Scholarship Council (studentship to ZZ) and the European Research Council (Consolidator Grant to SMG, agreement no. 724987). The authors thank Dr J. E. M. Lewis (Imperial College) for assistance with SCXRD and helpful discussions.
Publisher Copyright:
This journal is © The Royal Society of Chemistry.
Identifiers
Local EPrints ID: 437967
URI: http://eprints.soton.ac.uk/id/eprint/437967
ISSN: 2041-6520
PURE UUID: 9ee40541-3bed-48fa-a142-adc09f8dd7b8
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Date deposited: 24 Feb 2020 17:32
Last modified: 06 Jun 2024 01:40
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Contributors
Author:
Zhihui Zhang
Author:
J. A. Gareth Williams
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