Abstract
Two new series of anionic lanthanide(III) tetrakis(dibenzoylmethanato) complexes of the type [C4H8NEtH][Ln(dbm)4] [Ln = Pr (2a), Nd (2b), Eu (2c), Tb (2d), Lu (2e); dbm = dibenzoylmethanate anion; [C4H8NEtH]+ = N‐ethylpyrrolidinium cation] and [C5H10NEtH][Ln(dbm)4] [Ln = Pr (3a), Nd (3b), Eu (3c), Tb (3d), Lu (3e); [C5H10NEtH]+ = N‐ethylpiperidinium cation]. The results showed that anions of the type [Ln(dbm)4]– are accessible for Ln3+ ions covering a wide range of ionic radii. While neither 2c nor 3c showed the expected triboluminescence (TL) properties, the new TL‐active europium(III) complex salt [iPr2NH2][Eu(dbm)4] (4) could be isolated in a similar manner. Moreover, the unexpected formation and structural characterization of the nonanuclear europium cluster Eu9(μ4‐OH)2(μ3‐OH)8(bnac)16 (5) (bnac = benzoylacetonate anion) is described.
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