Gadolinium Oxalate Derivatives with Enhanced Magnetocaloric
Effect via Ionothermal Synthesis
Posted on 2014-09-02 - 00:00
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) (ΔSm = 48 J kg–1 K–1 for ΔH = 7 T at 2.2 K).