Lanthanide(<Emphasis Type="SmallCaps">III</Emphasis>) ion as a luminescent and catalytically active reaction center of aniline condensation with butyraldehyde

A new type of chemiluminescence catalytic conversion in which the lanthanide(III) ion is a luminescent and highly efficient catalytically active center was found. Chemiluminescence (CL) is generated in the condensation reaction of aniline with butyraldehyde in DMF to form 3-ethyl-2-propylquinoline. The reaction is catalyzed by LnCl₃·6H₂O (Ln = Eu, Tb, and Ho). When EuCl₃·6H₂O and TbCl₃·6H₂O salts are used as catalysts, the CL emitters are the Eu³⁺* and Tb³⁺* excited ions. In the case of HoCl₃·6H₂O, the emitter is 3-ethyl-2-propylquinoline in the triplet-excited state. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 429–431, March, 2007.