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Formation of Crystalline Telluridomercurates from Ionic Liquids near Room Temperature
Author(s) -
Donsbach Carsten,
Dehnen Stefanie
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.201600338
Subject(s) - ternary operation , spectroscopy , ionic liquid , crystallography , chemistry , fluorescence spectroscopy , analytical chemistry (journal) , band gap , ionic bonding , crystal structure , diffraction , ion , fluorescence , materials science , optics , catalysis , biochemistry , physics , optoelectronics , organic chemistry , chromatography , quantum mechanics , computer science , programming language
The ternary telluridomercurate Na 2 [HgTe 2 ] ( 1 ) was formed by fusion of Na 2 Te and HgTe at 600 °C and further treated in the ionic liquid (C 4 C 1 Im)[BF 4 ] (C 4 C 1 Im = 1‐butyl‐3‐methylimidazolium) at moderately elevated temperatures (60 °C), leading to replacement of the Na + cations with (C 4 C 1 Im) + and re‐arrangement of the inorganic substructure. As a result, we obtained the telluridomercurate (C 4 C 1 Im) 2 [HgTe 2 ] ( 2 ) and the tellurido/ditelluridomercurate (C 4 C 1 Im) 2 [Hg 2 Te 4 ] ( 3 ) besides polytellurides and HgTe as by‐products. The heavy atom compositions of the compounds were confirmed by micro X‐ray fluorescence spectroscopy (μ‐XFS), and their structures were determined by single‐crystal diffraction. The cation‐exchanged salts were further investigated by UV/Vis spectroscopy, indicating narrow band‐gap optical transitions at 2.80 eV ( 2 ) and 1.63 eV ( 3 ), in agreement with their visible yellow or reddish‐black color, respectively.