An Effectively Uncoupled Gd₈ Cluster Formed through Fixation of Atmospheric CO₂ Showing Excellent Magnetocaloric Properties.

ABSTRACT: The [Gd₈(opch)₈(CO₃)₄(H₂O)₈]·4H₂O·10MeCN coordination cluster (1) crystallises in P1¯. The Gd₈ core is held together by four bridging carbonates derived from atmospheric CO₂ as well as the carboxyhydrazonyl oxygens of the 2-hydroxy-3-methoxybenzylidenepyrazine-2-carbohydrazide (H₂opch) Schiff base ligands. The magnetic measurements show that the Gd^III ions are effectively uncoupled as seen from the low Weiss constant of 0.05 K needed to fit the inverse susceptibility to the Curie-Weiss law. Furthermore, the magnetisation data are consistent with the Brillouin function for eight independent Gd^III ions. These features lead to a magnetocaloric effect with

SUBMITTER: Braun J 

PROVIDER: S-EPMC10779177 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature