Friedrich, Daniel and Greim, Dominik and Schlosser, Marc and Siegel, Renee and Senker, Juergen and Pfitzner, Arno (2018) Synthesis and Characterization of Cs(4)Ga(6)Q(11) (Q = S, Se): Chalcogenometalates with Exotic Polymeric Anions. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 57 (49). pp. 16210-16214. ISSN 1433-7851, 1521-3773
Full text not available from this repository. (Request a copy)Abstract
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).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ONE-DIMENSIONAL INDIUM; SINGLE-CRYSTAL GROWTH; STRUCTURAL-CHARACTERIZATION; SOLVOTHERMAL SYNTHESIS; PHYSICAL-PROPERTIES; HEXASODIUM DI-MU-THIO-BIS(DITHIOGALLATE); TERNARY CHALCOGENIDES; ELECTRONIC-STRUCTURE; X-RAY; GALLIUM; azide route; chalcogenogallates; NMR spectroscopy; quantum-chemical calculations; semiconductors |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Arno Pfitzner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 Oct 2019 07:11 |
| Last Modified: | 04 Oct 2019 07:11 |
| URI: | https://pred.uni-regensburg.de/id/eprint/13373 |
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