Issue 22, 2022

Evidence for triplet-state-dominated luminescence in biicosahedral superatomic molecular Au25 clusters

Abstract

In photoluminescence (PL) quenching and triplet fusion upconversion experiments with fluorescent organic-molecule quenchers, it was revealed that a rod-shaped, phosphine- and thiolate-protected biicosahedral Au25 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.

Graphical abstract: Evidence for triplet-state-dominated luminescence in biicosahedral superatomic molecular Au25 clusters

Supplementary files

Article information

Article type
Communication
Submitted
11 פבר 2022
Accepted
05 אפר 2022
First published
26 אפר 2022

Nanoscale, 2022,14, 7974-7979

Evidence for triplet-state-dominated luminescence in biicosahedral superatomic molecular Au25 clusters

M. Mitsui, Y. Wada, R. Kishii, D. Arima and Y. Niihori, Nanoscale, 2022, 14, 7974 DOI: 10.1039/D2NR00813K

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