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Updated: Jun 26, 2026

Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of Manganese(II) Acetylacetonate
Published on: June 18, 2020
Synthesis and characterization of a series of manganese phosphonate complexes with various valences and nuclearity
Mei Wang1, Chengbing Ma, Huimin Wen
1Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
Abstract:
A series of new manganese phosphonate clusters with unprecedented topologies, [Mn(20)Na(4)O(12)(t-BuPO(3))(12)(O(2)CMe)(16)(H(2)O)(12)].5H(2)O (), [Mn(15)O(6)(MePO(3))(2)(MeCOO)(18)(H(2)O)(12)][MePO(3)H](2).12H(2)O (), and [Mn(t-BuPO(3)H)(2)(phen)(2)].MeCOOH () have been synthesized and characterized. The core of is composed of two folded "butterfly-like" [Mn(4)(mu(3)-O)(2)] units and two trigonal prism [Mn(6)O(6)] units connected by four mu(3)-O, resulting in a twisted oval of twenty homovalent manganese(iii) ions. The pentadecanuclear core of complex is mixed-valent, containing six Mn(III) and nine Mn(II) ions and features six mu(4)-O and two capping MePO(3)(2-) anions adopting the binding mode [6.222], forming a rudder-like cage structure with a chiral D(3) symmetry. Compound is a manganese(ii) phosphonate and features a 1D chain configuration packed by hydrogen bonds and pi-pi stacking interactions. Magnetic susceptibility measurements reveal that compounds 1, 2 , and 3 display antiferromagnetic interactions between the adjacent manganese ions, while the in-phase signal chi'(M)T and out-of-phase signal chi''(M) of complex 1 exhibit frequency-dependence below approximately 3 K, but no frequency-dependence is observed in the ac signals of complex 2.
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