Abstract
The title compound, [Eu(C9H10BN6)(C19H15O2)2(C3H7NO)] or [TpEu(Anthracac)2(DMF)], was synthesized by reaction of a tris-(pyrazol-yl)borate (Tp-) Eu3+ complex with 3-(anthracen-9-yl)pentane-2,4-dione (HAnthracac) in the presence of tri-ethyl-amine. In the title compound, Eu3+ is located in an octa-vertex square-pyramidal coordination environment. In the two Anthracac- ligands, the anthracene and nearly planar acetyl-acetonate fragments are almost orthogonal. Neighboring mol-ecules of TpEu(Anthracac)2(DMF) are connected in the crystal by inter-molecular van der Waals inter-actions, while π-stacking inter-actions are limited to the edges of two anthracene rings.
Highlights
Chemical contextLanthanide complexes find numerous applications as, for example, luminescent materials, markers, security inks, components of lasers, light-emitting diodes, and many others (Bunzli, 2017; Venturini Filho et al, 2018; Khullar et al, 2019; Bunzli, 2019)
Lanthanide complexes find numerous applications as, for example, luminescent materials, markers, security inks, components of lasers, light-emitting diodes, and many others (Bunzli, 2017; Venturini Filho et al, 2018; Khullar et al, 2019; Bunzli, 2019). This variety of uses relies in large parts on the electronic structure of the Ln3+ ions, which leads to electronic transitions occurring between f-orbitals, providing them with unique luminescence characteristics, including high color purity and exact reproducibility of the emitted light color (Sarkar et al, 2019; Wang, Pu et al, 2019; Wang, Zhao et al, 2019)
Ion surrounded by one TpÀ and two AnthracacÀ ligands and one dimethylformamide molecule
Summary
Lanthanide complexes find numerous applications as, for example, luminescent materials, markers, security inks, components of lasers, light-emitting diodes, and many others (Bunzli, 2017; Venturini Filho et al, 2018; Khullar et al, 2019; Bunzli, 2019) This variety of uses relies in large parts on the electronic structure of the Ln3+ ions, which leads to electronic transitions occurring between f-orbitals, providing them with unique luminescence characteristics, including high color purity and exact reproducibility of the emitted light color (Sarkar et al, 2019; Wang, Pu et al, 2019; Wang, Zhao et al, 2019). For this work, an Eu3+ complex with two types of antenna ligands, i.e. tris(pyrazolyl)borate (TpÀ) and 3-(anthracen-9yl)pentane-2,4-dionate (AnthracacÀ), of the composition TpEu(Anthracac)2(DMF) was obtained and its molecular and crystal structures were studied
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