Crystal Structure and Luminescence Properties of the First Hydride Oxide Chloride with Divalent Europium: LiEu2HOCl2. Issue 21 (9th October 2017)

• Record Type: Journal Article
• Authors: Rudolph, Daniel; Enseling, David; Jüstel, Thomas; Schleid, Thomas
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 643:Issue 21(2017)
• Page Start: 1525
• Page End: 1530
• Publication Date: 2017-10-09
• Subjects: Hydrides -- Structure elucidation -- Luminescence -- Oxide chlorides -- Lithium; Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201700224
• Languages: English
• ISSNs: 0044-2313

Abstract

Abstract : The mixed‐anionic hydride oxide chloride LiEu2 HOCl2 with divalent europium was synthesized by the reduction of Eu2 O3 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 LiLa2 HO3 and the hydride nitride LiSr2 H2 N. On the other hand it can also be derived from the PbFCl‐type structure of EuHCl showing astonishingly short Eu 2+ ···Eu 2+ contacts of 326 and 329 pm. Both crystallographically different Eu 2+ cations have nine anionic neighbors, while all other ions (Li +, H –, O 2– and Cl – ) reside in six‐membered coordination spheres. LiEu2 OCl2 H exhibits a bright yellow luminescence with an emission maximum at 581 nm upon excitation at 440 nm. Abstract :