title: Gadolinium oxalate derivatives with enhanced magnetocaloric effect via ionothermal synthesis.
abstract: Two new oxalate-bridged Gd(III) coordination polymers, namely, (choline)[Gd(C2O4)(H2O)3Cl]Cl·H2O (1) and [Gd(C2O4)(H2O)3Cl] (2), were first obtained ionothermally by using a deep eutectic solvent (DES). The magnetic studies and heat capacity measurements reveal that the two-dimensional Gd(III)-based coordination polymer of 2 has the higher magnetic density and exhibits a larger cryogenic magnetocaloric effect (MCE) (ΔS(m) = 48 J kg(-1) K(-1) for ΔH = 7 T at 2.2 K).
authors.affiliation: Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , Guangzhou 510275, P. R. China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Meng
authors.forename: Yan-Cong
authors.initials: YC
authors.lastname: Chen
authors.forename: Ze-Min
authors.initials: ZM
authors.lastname: Zhang
authors.forename: Zhuo-Jia
authors.initials: ZJ
authors.lastname: Lin
authors.forename: Ming-Liang
authors.initials: ML
authors.lastname: Tong