Pienack, Nicole and Luehmann, Henning and Djamil, John and Permien, Stefan and Naether, Christian and Haumann, Sebastian and Weihrich, Richard and Bensch, Wolfgang (2015) Two Pseudopolymorphic Star-Shaped Tetranuclear Co3+ Compounds with Disulfide Anions Exhibiting Two Different Connection Modes and Promising Photocatalytic Properties. CHEMISTRY-A EUROPEAN JOURNAL, 21 (39). pp. 13637-13645. ISSN 0947-6539, 1521-3765
Full text not available from this repository. (Request a copy)Abstract
The compound [Co-4(C6H14N2)(4)((4)-S-2)(2)((2)-S-2)(4)] (I) and the pseudo-polymorph [Co-4(C6H14N2)(4)((4)-S-2)(2)((2)-S-2)(4)]4H(2)O (II) were obtained under solvothermal conditions (C6H14N2=trans-1,2-diaminocyclohexane). The structures feature S-2(2-) ions exhibiting two different coordination modes. Terminal S-2(2-) entities join two Co3+ centres in a (2) fashion, whereas the central S-2(2-) groups connect four Co3+ cations in a (4)- coordination mode. Compound II can be transformed into compound I by heat and storage over P2O5 and storing compound I in humid air yields in the formation of compound II. The intermolecular interactions investigated through Hirshfeld surface analysis reveal that besides SH bonding close contacts are associated with relatively weak HH interactions. A detailed DFT analysis of the bonding situation explains the long SS bonds in the (4)-bridging S-2(2-) units and the short bonds for the S-2(2-) moieties in the (2)-connecting mode. Photocatalytic hydrogen evolution experiments demonstrate the potential of compound II as catalyst.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INTERMOLECULAR INTERACTIONS; CRYSTAL-STRUCTURES; HYDROGEN-PRODUCTION; MOLECULAR-CRYSTALS; HIRSHFELD SURFACES; COMPLEXES; COBALT; EVOLUTION; SULFIDE; SYSTEMS; cobalt; density functional calculations; disulfide bridges; Hirshfeld surface; photocatalysis |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Arbeitskreis Dr. Richard Weihrich |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Jun 2019 08:27 |
| Last Modified: | 07 Jun 2019 08:27 |
| URI: | https://pred.uni-regensburg.de/id/eprint/4820 |
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