Zeitschrift für Anorganische und Allgemeine Chemie
Zeitschrift für Anorganische und Allgemeine Chemie
3 years ago

Crystal Structure and Luminescence Properties of the First Hydride Oxide Chloride with Divalent Europium: LiEu2HOCl2

Crystal Structure and Luminescence Properties of the First Hydride Oxide Chloride with Divalent Europium: LiEu2HOCl2
Daniel Rudolph, Thomas Jüstel, David Enseling, Thomas Schleid
The mixed-anionic hydride oxide chloride LiEu2HOCl2 with divalent europium was synthesized by the reduction of Eu2O3 with LiH in a LiCl flux at 750 °C for 4 d in silica-jacketed niobium capsules. According to structure determination by single-crystal X-ray diffraction the yellow compound crystallizes in the orthorhombic space group Cmcm (a = 1492.30(11) pm, b = 570.12(4) pm, c = 1143.71(8) pm, Z = 8) with a crystal structure closely related to that one of the quaternary hydride oxide LiLa2HO3 and the hydride nitride LiSr2H2N. On the other hand it can also be derived from the PbFCl-type structure of EuHCl showing astonishingly short Eu2+···Eu2+ contacts of 326 and 329 pm. Both crystallographically different Eu2+ cations have nine anionic neighbors, while all other ions (Li+, H–, O2– and Cl–) reside in six-membered coordination spheres. LiEu2OCl2H exhibits a bright yellow luminescence with an emission maximum at 581 nm upon excitation at 440 nm.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/zaac.201700224

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