SupraBank - Interaction of the Large Host Q[10] with Metal Polypyridyl Complexes: Binding Modes and Effects on Luminescence

DOI:: https://doi.org/10.34804/supra.20210928279
Title:: Interaction of the Large Host Q[10] with Metal Polypyridyl Complexes: Binding Modes and Effects on Luminescence

Description:: Aqueous solution state host–guest systems have been studied, comprising the large host cucurbit[10]uril with luminescent cationic tris(polypyridyl) (PP) metal complexes [Ru(PP)3]2+ and [Ir(PP)3]3+. All complexes bind strongly with the host, with the overall complex charge and size having a minor effect on affinity but influencing the association dynamics and contribution from higher-order (1:2) host–guest species. The 1:2 species contributes more significantly to the binding equilibrium in the case of [Ru(phen)3]2+. The effect of the host upon emission is highly variable and depends on the electronic structure of the guest. The metal-to-ligand charge transfer (MLCT) emission of [Ru(PP)3]2+ is strongly quenched, in contrast to the large enhancements seen previously for MLCT emission of iridium cyclometalated complexes, while the ligand-centered emission of [Ir(PP)3]3+ is little affected. The mechanisms of quenching and enhancement are discussed, together with the implications for the design of larger supramolecular assemblies based on these archetypal emitters.

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Creators:: | | K. M. Anis-Ul-Haque; | | Clifford Woodward; | | Anthony Day; | | Lynne Wallace
Contributers:: | | Nilima Manoj Kumar | DataManager

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Citation:	K. M. Anis-Ul-Haque, C. Woodward, A. Day, L. Wallace, SupraBank 2024, Interaction of the Large Host Q[10] with Metal Polypyridyl Complexes: Binding Modes and Effects on Luminescence (dataset). https://doi.org/10.34804/supra.20210928279
Link:	https://doi.org/10.34804/supra.20210928279
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Citation:	K. M. Anis-Ul-Haque, C. E. Woodward, A. I. Day, L. Wallace, Inorg. Chem. 2020, 59, 3942–3953.
Link:	https://doi.org/10.1021/acs.inorgchem.9b03603
Export:	BibTex \| RIS \| EndNote \|