Resumen: The solvothermal reaction of FeCl2 ⋅ 4H2O and H4TBC[4] in a basic dmf/EtOH solution affords an [FeIII18] Keplerate conforming to a stellated cuboctahedron. Magnetic and heat capacity measurements reveal spin frustration effects arising from the high symmetry. A crossover between inverse and direct magnetocaloric effects is observed at ~10 K for applied-field changes lower than 3 T. Idioma: Inglés DOI: 10.1002/anie.202405666 Año: 2024 Publicado en: Angewandte Chemie (International ed.) 63, 37 (2024), e202405666 [6 pp.] ISSN: 1433-7851 Factor impacto JCR: 17.0 (2024) Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 15 / 239 = 0.063 (2024) - Q1 - T1 Factor impacto CITESCORE: 27.6 - Catalysis (Q1) - Chemistry (all) (Q1)