Demonstrates improved upconversion efficiency in nanoclusters, suggesting novel pathways for energy transfer.
Metal nanoclusters (NCs) hold great promise as triplet sensitizers for triplet–fusion upconversion. Here, we boost the performance of [Au13(dppe)5R2]3+ by integrating a triplet-mediator ligand, R = C≡C–DPA (DPA = 9,10-diphenylanthracene). This strategic decoration resulted in an 850-fold acceleration in intermolecular energy transfer and a 38-fold increase in the reabsorption-corrected upconversion quantum yield compared to the phenyl-terminated counterpart. This study establishes surface-mediator pathways as crucial for bypassing the bulky ligand shell that protects the metal core in NC sensitizers.
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Mitsui et al. (2026) studied this question.
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