C-dots (3–5 nm in diameter) obtained by most simple heating of polyols (glycerol, diethylene glycol and PEG 400) show intense blue and green emission (50% quantum yield). Upon modification with TbCl3/EuCl3, energy transfer from the C-dots to the rare-earth metal results in line-type Tb3+ (green)/Eu3+ (red) emission with quantum yields up to 85%.
H. Dong, A. Kuzmanoski, D. M. Gößl, R. Popescu, D. Gerthsen and C. Feldmann, Chem. Commun., 2014, 50, 7503 DOI: 10.1039/C4CC01715C
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