Journal article
An Exotic Layered Compound Consisting of Interconnected Arsenato-Polyoxovanadate Clusters: Thermal and Magnetic Properties and Liquid Phase Exfoliation



Publication Details
Authors:
Mahnke, L.; Stehlikova, G.; Synnatschke, K.; Backes, C.; Naether, C.; Bensch, W.
Publisher:
WILEY-V C H VERLAG GMBH
Publication year:
2021
Journal:
CHEMNANOMAT
Pages range:
78-84
Volume number:
7
Issue number:
1
Start page:
78
End page:
84
Number of pages:
7
ISSN:
2199-692X

Abstract
The compound {[Mn(teta)](4)V16As4O42(H2O)}(n) . 10 H2O (teta=triethylenetetraamine) was synthesized under solvothermal conditions. The crystal structure consists of layers composed of {V16As4O42} moieties joined by O-Mn-O bridges. The crystal water molecules can be thermally removed and they are reintegrated in humid atmosphere. The water sorption occurs in two steps indicating differing strengths of hydrogen bonding interactions. Investigations of the magnetic properties present evidence that the antiferromagnetic exchange interactions between the spins of the Mn2+ and of the V4+ cations are relatively strong. The magnetocaloric effect could be observed but is relatively small due to the antiferromagnetic exchange. Using liquid phase exfoliation, small crystallites with thicknesses as low as 10 nm could be obtained, while larger crystallites exhibit thicknesses of 20-40 nm.


Keywords
layered antimonato-polyoxovanadates, liquid phase exfoliation, magnetocaloric effect, nanosheets, release, reversible water uptake


Authors/Editors

Last updated on 2021-11-10 at 10:10