Large and tunable magnetocaloric effect in gadolinium-organic framework: tuning by solvent exchange.

ABSTRACT: Magnetic properties of three variants of MOF-76(Gd), {[Gd(BTC)(H₂O)]·G}_n (BTC = benzene-1,3,5-tricarboxylate, G = guest molecules) were investigated by static susceptibility, isothermal magnetization and specific heat capacity measurements. In the study we used as synthesized MOF-76(Gd)-DMF (1) (G = DMF = dimethylformamide), containing DMF molecules in the cavity system, compound MOF-76(Gd) (2), activated complex without solvents in the cavities and water exchanged sample MOF-76(Gd)-H₂O (3). A pronounced change in the magnetic entropy was found near the critical temperature for all three compounds. It was shown, that magnetic entropy change depends on the solvatation of the MOF. The highest value entropy change, ΔS_Mpk(T) was observed for compound

SUBMITTER: Zelenak V 

PROVIDER: S-EPMC6821888 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature