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2018•Zeitschrift für anorganische und allgemeine ChemieRequires access

Two New Series of Potentially Triboluminescent Lanthanide(III) β‐Diketonate Complexes

Leif‐Kenneth Margenfeld, Phil Liebing, Florian Oehler, Volker Lorenz, Felix Engelhardt, Liane Hilfert, Sabine Busse, Frank T. Edelmann

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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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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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Available 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.

Key concepts: Lanthanide, Europium, Chemistry, Ionic radius, Ion, Salt (chemistry), Crystallography, dBm

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Two New Series of Potentially Triboluminescent Lanthanide(III) β‐Diketonate Complexes — Research Paper | ScholarLens