Photoinduced energy- and electron- transfer between a photoactive cage based on a thermally activate delayed fluorescence ligand and encapsulated fluorescent dyes
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The vast majority of polyhedral assemblies prepared by combining organic bent ligands and “photophysically innocent” palladium(II) metal ions are non-emissive. Here we report a simple strategy to switch on the luminescence properties of a polyhedral assembly by combining a Thermally Activated Delayed Fluorescence (TADF) organic emitter based on a dipyridylcarbazole ligand scaffold with Pd2+ ions, giving rise to a luminescent Pd6L12 molecular cube. The assembly is capable of encapsulating within its cavity up to three molecules per cage of Fluorescein, in its neutral lactone form, and up to two molecules of Rose Bengal in its dianionic quinoidal form. Photoinduced electron Transfer (PeT) between the photoactive cage and the encapsulated Fluorescein and Photoinduced Energy Transfer (PET) from the cage to encapsulated Rose Bengal have been observed by steady-state and time-resolved emission spectroscopy.
Rota Martir , D , Pizzolante , A , Escudero , D , Jacquemin , D , Warriner , S & Zysman-Colman , E 2018 , ' Photoinduced energy- and electron- transfer between a photoactive cage based on a thermally activate delayed fluorescence ligand and encapsulated fluorescent dyes ' ACS Applied Energy Materials , vol. In press . https://doi.org/10.1021/acsaem.8b00732
ACS Applied Energy Materials
Copyright © 2018 American Chemical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1021/acsaem.8b00732
DescriptionThe authors thank the Leverhulme Trust (RPG-2016-047) and EPSRC (EP/P010482/1) for financial support. DE thanks funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No. 700961.
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