biostudies-literatureMeng YNational Natural Science Foundation of ChinaNational Natural Science Foundation of China (National Science Foundation of China)933https://www.ebi.ac.uk/biostudies/studies/S-EPMC12830983biostudies-literatureUnknown17(1)The non-radiative metallic core (MC) centered lowest excited states of most ligand-stabilized metallic clusters commonly quench radiative but high-lying ligand-centered excited states, e.g. intra-ligand charge transfer (LCT), which is one of the key issues limiting efficiencies of electroluminescent (EL) clusters. Herein, we realize the desired excited state reversal in a cubic [PXZDBFDP]<sub>2</sub>Cu<sub>4</sub>I<sub>4</sub> (PXZDBFDP = 10-(4,6-bis(diphenylphosphino)dibenzo[b,d]furan-2-yl)-10H-phenoxazine) modified with strongly electron-donating phenoxazine (PXZ) to strengthen donor-acceptor (D-A) interactions and enhance LCT. Consequently, its thoroughly LCT-featured first singlet (S<sub>1</sub>) and triplet (T<sub>1</sub>) excited states are energetically lower than its Cu<sub>4</sub>Nature communicationsExcited state reversal in copper iodide clusters enables 100% exciton radiation.PMC1283098322325502, 92461304, W2412073, 22305073 and 52273173Zhang JDuan CLiu CWang YHan CXu HMeng YFei JXu YfalseExcited state reversal in copper iodide clusters enables 100% exciton radiation.The non-radiative metallic core (MC) centered lowest excited states of most ligand-stabilized metallic clusters commonly quench radiative but high-lying ligand-centered excited states, e.g. intra-ligand charge transfer (LCT), which is one of the key issues limiting efficiencies of electroluminescent (EL) clusters. Herein, we realize the desired excited state reversal in a cubic [PXZDBFDP]<sub>2</sub>Cu<sub>4</sub>I<sub>4</sub> (PXZDBFDP = 10-(4,6-bis(diphenylphosphino)dibenzo[b,d]furan-2-yl)-10H-phenoxazine) modified with strongly electron-donating phenoxazine (PXZ) to strengthen donor-acceptor (D-A) interactions and enhance LCT. Consequently, its thoroughly LCT-featured first singlet (S<sub>1</sub>) and triplet (T<sub>1</sub>) excited states are energetically lower than its Cu<sub>4</sub>2025-01-01T00:00:00Z2025 Dec2026-06-06T20:15:09.455Z2026-06-04T03:14:10.58ZS-EPMC128309834140230310.1038/s41467-025-67664-x