Switching of the magnetocaloric effect of Mn(II) glycolate by water molecules

Yan-Cong Chen; Fu-Sheng Guo; Jun-Liang Liu; Ji-Dong Leng; Peter Vrábel; Martin Orendáč; Jan Prokleška; Vladimír Sechovský; Ming-Liang Tong

doi:10.1002/chem.201304423

Switching of the magnetocaloric effect of Mn(II) glycolate by water molecules

Chemistry. 2014 Mar 10;20(11):3029-35. doi: 10.1002/chem.201304423. Epub 2014 Feb 13.

Authors

Yan-Cong Chen¹, Fu-Sheng Guo, Jun-Liang Liu, Ji-Dong Leng, Peter Vrábel, Martin Orendáč, Jan Prokleška, Vladimír Sechovský, Ming-Liang Tong

Affiliation

¹ Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry & Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275 (P. R. China).

PMID: 24532426
DOI: 10.1002/chem.201304423

Abstract

The transformation of Mn(II) glycolates (glc) between the three-dimensional coordination polymer [Mn(glc)2]n (1) and discrete mononuclear phase [Mn(glc)2 (H2O)2] (2) can be reversibly switched by water molecules, which dramatically change the magnetocaloric effect (MCE) of Mn(II) glycolates from the maximum of 6.9 J kg(-1) K(-1) in 1 to 60.3 J kg(-1) K(-1) in 2. This case example reveals that the effect of magnetic coupling on MCE plays a dominant role over that of other factors such as magnetic density for 3d-type magnetic refrigerants.

Keywords: coordination polymers; glycolates; magnetic properties; magnetocaloric effect; manganese.