Galico, Diogo A.; Ramdani, Rayan; Murugesu, Muralee published the artcile< Phonon-assisted molecular upconversion in a holmium(III)-based molecular cluster-aggregate>, Reference of 73018-09-4, the main research area is holmium gadolinium ytterbium mol cluster aggregate upconversion emission spectra.
Upconversion (UC) is a fascinating process in which higher energy photons can be emitted from excitation by lower energy photons. The current challenge remains in downscaling and effectively achieving upconversion with lanthanide ions at the mol. scale. Here, using a rationally designed mol. cluster-aggregate (MCA), we demonstrate for the first time HoIII ion mol. upconversion. The synthesized MCA exhibits identifiable HoIII green and red UC emissions with a uniquely enhanced red to green ratio as well as a conventional near-IR (NIR) emission. A combined rigid spherical cluster core with reduced mol. vibrations, ideally matched donor and acceptor excited levels via a phonon-assisted mechanism, led to an upconversion quantum yield of 5.24 x 10-6%.
Nanoscale published new progress about Aggregates. 73018-09-4 belongs to class pyridine-derivatives, and the molecular formula is C5H4ClNO, Reference of 73018-09-4.