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Updated: Jan 24, 2026
Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate
Published on: June 18, 2020
Oxo-bridged trinuclear and tetranuclear manganese complexes supported with nitrogen donor ligands: syntheses,
Deepak Bansal1, Abhishake Mondal, N Lakshminarasimhan
1Department of Chemistry, University of Delhi, Delhi - 110 007, India. rgupta@chemistry.du.ac.in.
Abstract:
In this work, we present the syntheses of two μ3-oxo bridged mixed-valent trinuclear MnIIMnIII complexes (1 and 2) and a μ4-oxo bridged tetranuclear Mn complex (3). All the three manganese complexes have been characterized crystallographically and by using different analytical techniques. Both mixed-valent trinuclear complexes 1 and 2 exhibited Jahn-Teller distortion for the Mn(iii) ion. Variable temperature magnetic susceptibility studies of all three complexes revealed antiferromagnetic coupling between the closely placed paramagnetic manganese ions mediated via a μ-oxo bridge. Cyclic voltammetry studies displayed both Mn(iii)/Mn(ii) and Mn(iv)/Mn(iii) redox couples in 1 whereas only the Mn(iii)/Mn(ii) couple was observed for complexes 2 and 3. Importantly, complexes 2 and 3 were found to disproportionate H2O2, and the catalase activity has been related to their structural features and redox properties.
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