https://pubs.rsc.org/en/content/articlelanding/2003/CC/b209337e
Scintillation-based potassium signalling using 2,5-diphenyloxazole-tagged aza-18-crown-6 - Chemical...
In the presence of ionising radiation, an aza-18-crown-6 molecule covalently attached to a 2,5-diphenyloxazole (PPO) moiety scintillates weakly, addition of...