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Synthesis and Characterization of Cs₄Ga₆Q₁₁ (Q = S, Se): Chalcogenometalates with Exotic Polymeric Anions

Title data

Friedrich, Daniel ; Greim, Dominik ; Schlosser, Marc ; Siegel, Renée ; Senker, Jürgen ; Pfitzner, Arno:
Synthesis and Characterization of Cs₄Ga₆Q₁₁ (Q = S, Se): Chalcogenometalates with Exotic Polymeric Anions.
In: Angewandte Chemie International Edition. Vol. 57 (December 2018) Issue 49 . - pp. 16210-16214.
ISSN 1521-3773
DOI: https://doi.org/10.1002/anie.201805239

Abstract in another language

Two new chalcogenogallates Cs(4)Ga(6)Q(11) (Q = S, Se) were obtained by a controlled thermal treatment of CsN3 in the presence of stoichiometric amounts of Ga(2)Q(3) and the elemental chalcogens at elevates temperatures. Both isotypic compounds crystallize in the space group P (1) over bar (no. 2). The most prominent structural feature in these chalcogenogallates are the complex anionic Dreier double chains (1)(infinity)Ga(6)Q(11)(4-)] formed by condensed GaQ(4) tetrahedra. The semiconductors Cs4Ga6S11 (E-g = 3.14 eV) and Cs4Ga6Se11 (E-g = 2.41 eV) were further studied by using UV/Vis, Cs-133 and Ga-71 solid-state NMR spectroscopy, and complementary DFT calculations. The Cs-133 MAS NMR spectra are characteristic for cationic cesium and vibrational spectra show two distinct regions, attributed to the Ga-Q valence and deformation vibrations, respectively. High-temperature studies revealed incongruent melting of both solids, which is also depicted in updated binary phase-diagrams Cs(2)Q-Ga(2)Q(3) (Q = S, Se).

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry III
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry III > Chair Anorganic Chemistry III - Univ.-Prof. Dr. Jürgen Senker
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 07 Jun 2019 07:10
Last Modified: 07 Jun 2019 07:10
URI: https://eref.uni-bayreuth.de/id/eprint/49287