Enhanced Photostability of a Ruthenium(II) Polypyridyl Complex under Highly Oxidizing Aqueous Conditions by Its Partial Inclusion into a Cyclodextrin |
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| Authors: | Dr Pau Farras Dr Helen Waller Prof Andrew C Benniston |
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| Affiliation: | 1. Molecular Photonics Laboratory, School of Chemistry, Newcastle University, Newcastle upon Tyne, UK;2. School of Chemistry, NUI Galway, Galway, Ireland;3. Institute for Cell and Molecular Biosciences, Medical School, Newcastle University, Newcastle upon Tyne, UK |
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| Abstract: | The complex Ru(bpy)2L]2+, where bpy=2,2′‐bipyridine, L=4‐(phenylethynyl)‐2,2′‐bipyridine, was prepared in its racemic and resolved forms (Δ and Λ). The phenylethynyl unit on the bipyridine for the complex acts as a binding site for α‐cyclodextrin in water (1:1 complex, K=3390 L mol?1) or β‐cyclodextrin (2:1 complex, K1=887 L mol?1, K2=8070 L mol?1). The presence of the cyclodextrin provides partial protection to the complex under light‐activated water oxidation conditions. |
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| Keywords: | chirality cyclodextrin photooxidation photosensitizers ruthenium |
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