期刊
ACS APPLIED ENERGY MATERIALS
卷 1, 期 6, 页码 2971-2978出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.8b00732
关键词
photoactive cage; TADF ligand; encapsulation of dyes; energy and electron transfer; white-emitting assembly
资金
- Leverhulme Trust [RPG-2016-047]
- EPSRC [EP/P010482/1]
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [700961]
- Marie Curie Actions (MSCA) [700961] Funding Source: Marie Curie Actions (MSCA)
- EPSRC [EP/P010482/1] Funding Source: UKRI
The vast majority of polyhedral assemblies prepared by combining organic bent ligands and photophysically innocent palladium(II) metal ions are nonemissive. We report here 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.
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