1 research outputs found
Diogen Laertije - Životi i mišljenja istaknutih filozofa
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
Pd<sup>2+</sup> ions, giving rise to a luminescent Pd<sub>6</sub>L<sub>12</sub> 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