Wutkowski, Adam, Niefind, Felix, Näther, Christian and Bensch, Wolfgang (2011) A New Mixed-Valent High Nuclearity Polyoxovanadate Cluster Based on the {V18O42} Archetype. Zeitschrift für anorganische und allgemeine Chemie, 637 (14-15). pp. 2198-2204. DOI 10.1002/zaac.201100329.

Full text not available from this repository.

Abstract

The compound (enH2)6[HV(16)(IV)V(2)(V)O(42)(Cl)]center dot Cl(2).2H2O (en = 1,2-diaminoethane) (1), was synthesized under solvothermal conditions employing the amine as reducing agent. Compound 1 crystallizes in the orthorhombic space group Pbcn with a = 13.3343(7), b = 22.3697(3), c = 19.8012(11) angstrom, V = 5906.4(5) angstrom 3, Z = 4. The central structural motif is a polyoxovanadate anion [HV(18)O(42)(Cl)](-10) being composed of 18 VO(5) square pyramids. The cluster shell contains a (VO(5))(8) ring in the vertical plane and two (VO(5))(5) pentagons above and below the ring which are twisted by 45 degrees against each other.Bond valence sum analysis indicates a mixture of VIV/VV atoms with a ratio of 16:2, which is further supported by redox titration. An arrangement of these clusters within the (001) plane leads to the formation of channels hosting the protonated amine molecules, the Cl anions and water molecules which are joined by an extended hydrogen bonding network. TG-MS investigation shows a thermal decomposition reaction in at least three steps. The optical band gap was determined as 2.5 eV.

Document Type:	Article
Research affiliation:	Kiel University > Kiel Marine Science OceanRep > The Future Ocean - Cluster of Excellence Kiel University
Refereed:	Yes
Open Access Journal?:	No
Publisher:	American Medical Association
Projects:	Future Ocean
Date Deposited:	12 Jun 2018 10:55
Last Modified:	28 Mar 2019 12:36
URI:	https://oceanrep.geomar.de/id/eprint/43348

Actions (login required)

View Item