Publication Date:
2017-09-30
Description:
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 days 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.
Print ISSN:
0044-2313
Electronic ISSN:
1521-3749
Topics:
Chemistry and Pharmacology
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