Evidence for triplet-state-dominated luminescence in biicosahedral superatomic molecular Au<sub>25</sub> clusters
Masaaki Mitsui, Yuki Wada, Ryoto Kishii, Daichi Arima, Yoshiki Niihori
Abstract
cluster (a representative di-superatomic molecule) exhibits only phosphorescence, not fluorescence, at room temperature with an intersystem crossing quantum yield of almost 100%. By virtue of these photophysical properties, this cluster can be used as a triplet sensitizer that undergoes direct singlet-triplet transitions in the near-infrared (NIR) region (730-900 nm), inducing photon upconversion from NIR to visible light.
Topics & Concepts
Intersystem crossingPhosphorescencePhotochemistryTriplet stateQuantum yieldPhoton upconversionFluorescencePhotoluminescenceSinglet stateQuenching (fluorescence)LuminescenceMoleculeMaterials scienceCluster (spacecraft)ChemistryOptoelectronicsExcited stateAtomic physicsPhysicsOpticsOrganic chemistryProgramming languageComputer scienceNanocluster Synthesis and ApplicationsPharmacological Effects and Toxicity StudiesNeurological Complications and Syndromes