Journal
CHEMICAL SCIENCE
Volume 11, Issue 7, Pages 1839-1847Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9sc05507j
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Funding
- China Scholarship Council
- European Research Council [724987]
- European Research Council (ERC) [724987] Funding Source: European Research Council (ERC)
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We report an approach to rotaxanes in which the metal ion of a cyclometallated Pt-II luminophore is embedded in the space created by the mechanical bond. Our results show that the interlocked ligand environment stabilises a normally labile Pt-II-triazole bond against displacement by competing ligands and that the crowded environment of the mechanical bond retards oxidation of the Pt-II centre, without perturbing the photophysical properties of the complex. When an additional pyridyl binding site is included in the axle, the luminescence of the Pt-II centre is quenched, an effect that can be selectively reversed by the binding of Ag-I. 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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