Thermal analysis and structure transformation of Mn12-Ac magnetic molecular crystals | Zendy

Liu Ying | Zendy; Peiwen Ge | Zendy; Su Shao-Kui | Zendy; Lijuan Zhang | Zendy; Wang Yun-ping | Zendy

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Thermal analysis and structure transformation of Mn12-Ac magnetic molecular crystals

Author(s) -

Liu Ying,

Peiwen Ge,

Su Shao-Kui,

Lijuan Zhang,

Wang Yun-ping

Publication year - 2004

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.53.4015

Subject(s) - materials science , molecule , ion , atmospheric temperature range , crystal structure , thermal stability , crystal (programming language) , thermal , crystallography , magnetic susceptibility , thermodynamics , chemistry , physics , organic chemistry , computer science , programming language

The thermal stability of Mn12-Ac[Mn12(CH3COO)16(H2O)4O12]52CH3COOH54H2O magnetic molecular crystals was investigated by TG-DTA from room temperature to 270℃. According to the results of XRD and TG,we found that Mn12-Ac lost the crystal water and the acetic acid molecules of solvation which were located between the adjacent molecules in the temperature range from 25℃ to 1 10℃. At the same time, 4H2O which were linked with 4 Mn3+ were lost. The crystalline structure of Mn12-Ac single crystal was destroyed during this course. However, the core structure in the molecule was well preserved. From 180℃ to 230℃, a further transformatio n took place, Mn12-Ac lost all the CH3COO- ions and turned intoγ-Mn2O3, with a little amount of Mn3O4.

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