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Rotaxane Pt(II)-Complexes: Mechanical Bonding for Chemically Robust Luminophores and Stimuli Responsive Behaviour
Chemical Science ( IF 9.969 ) Pub Date : 2023-02-15 , DOI: 10.1039/c9sc05507j Zhi-Hui Zhang, Graham J. Tizzard, Gareth Williams, Stephen Goldup
Chemical Science ( IF 9.969 ) Pub Date : 2023-02-15 , DOI: 10.1039/c9sc05507j Zhi-Hui Zhang, Graham J. Tizzard, Gareth Williams, Stephen Goldup
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 was included in the axle, the luminescecence of the PtII centre is quenched, an effect that 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.
更新日期：2020-01-02
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