Premium
Crystal Structure and Luminescence Properties of the First Hydride Oxide Chloride with Divalent Europium: LiEu 2 HOCl 2
Author(s) -
Rudolph Daniel,
Enseling David,
Jüstel Thomas,
Schleid Thomas
Publication year - 2017
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201700224
Subject(s) - hydride , europium , orthorhombic crystal system , crystal structure , chemistry , luminescence , crystallography , oxide , inorganic chemistry , ion , materials science , metal , optoelectronics , organic chemistry
The mixed‐anionic hydride oxide chloride LiEu 2 HOCl 2 with divalent europium was synthesized by the reduction of Eu 2 O 3 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 LiLa 2 HO 3 and the hydride nitride LiSr 2 H 2 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. LiEu 2 OCl 2 H exhibits a bright yellow luminescence with an emission maximum at 581 nm upon excitation at 440 nm.