title: Switching of the magnetocaloric effect of Mn(II) glycolate by water molecules.
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.
authors.affiliation: 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).
authors.forename: Yan-Cong
authors.initials: YC
authors.lastname: Chen
authors.forename: Fu-Sheng
authors.initials: FS
authors.lastname: Guo
authors.forename: Jun-Liang
authors.initials: JL
authors.lastname: Liu
authors.forename: Ji-Dong
authors.initials: JD
authors.lastname: Leng
authors.forename: Peter
authors.initials: P
authors.lastname: Vrábel
authors.forename: Martin
authors.initials: M
authors.lastname: Orendáč
authors.forename: Jan
authors.initials: J
authors.lastname: Prokleška
authors.forename: Vladimír
authors.initials: V
authors.lastname: Sechovský
authors.forename: Ming-Liang
authors.initials: ML
authors.lastname: Tong
keywords: coordination polymers; glycolates; magnetic properties; magnetocaloric effect; manganese