Rommel, Stefan Michael and Krach, Alexander and Peter, Philipp and Weihrich, Richard (2016) Conversion Reactions of Solids: From a Surprising Three-Step Mechanism towards Directed Product Formation. CHEMISTRY-A EUROPEAN JOURNAL, 22 (18). pp. 6333-6339. ISSN 0947-6539, 1521-3765
Full text not available from this repository. (Request a copy)Abstract
Directed conversion reactions from binary to multinary compounds are discovered from the reaction of Bi2S3 and Bi2Se3 with NiCl2 center dot 6H(2)O in polyol media under basic conditions. Control of the synthesis conditions allows the preparation of NiBiSe and superconducting Ni3Bi2S2 and Ni3Bi2Se2. The formation of Ni3Bi2S2 from Bi2S3 is found from an unexpected three-step reaction path with Bi and NiBi as intermediates. In the more complex Ni/Bi/Se system, the mechanism found can be used to selectively direct the reaction between the competing ternaries and to suppress sideproduct formation. Contrary to solid-state reactions (500-900 degrees C) control of product formation is reached at reaction temperatures and times between 166-300 degrees C and 0.5-10 h, respectively. The formation of different phases is discussed from results of DFT calculations.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | POLYOL-MEDIATED SYNTHESIS; TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; IONIC LIQUIDS; INTERMETALLOID CLUSTERS; SOLVOTHERMAL PROCESS; FRAMEWORK STRUCTURE; PHASE STABILITIES; CRYSTAL-STRUCTURE; SINGLE-CRYSTALS; formation mechanism; nanoparticles; polyol process; synthetic methods; ternary chalcogenide |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie Chemistry and Pharmacy > Institut für Anorganische Chemie > Arbeitskreis Dr. Richard Weihrich |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Mar 2019 09:13 |
| Last Modified: | 15 Mar 2019 09:13 |
| URI: | https://pred.uni-regensburg.de/id/eprint/3059 |
Actions (login required)
 |
View Item |
