Mixed-valent Mn supertetrahedra and planar discs as enhanced magnetic coolers (Articolo in rivista)

Type
Label
  • Mixed-valent Mn supertetrahedra and planar discs as enhanced magnetic coolers (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/ja802829d (literal)
Alternative label
  • Manoli, M; Collins, A; Parsons, S; Candini, A; Evangelisti, M; Brechin, EK (2008)
    Mixed-valent Mn supertetrahedra and planar discs as enhanced magnetic coolers
    in Journal of the American Chemical Society (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Manoli, M; Collins, A; Parsons, S; Candini, A; Evangelisti, M; Brechin, EK (literal)
Pagina inizio
  • 11129 (literal)
Pagina fine
  • 11139 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 130 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. CNR, INFM, Natl Res Ctr NanoStruct & BioSyst Surfaces, I-41100 Modena, Italy 2. Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland (literal)
Titolo
  • Mixed-valent Mn supertetrahedra and planar discs as enhanced magnetic coolers (literal)
Abstract
  • The syntheses and structures of two decametallic mixed-valent Mn supertetrahedra using 2-amino-2-methyl-1,3-propanediol (ampH(2)), two decametallic mixed-valent Mn planar discs using 2-amino-2-methyl-1,3-propanediol (ampH(2)) and 2-amino-2-ethyl-1,3-propanediol (aepH(2)), and a tetradecametallic mixed-valent Mn planar disc using pentaerythritol (H(4)peol) are reported. The decametallic complexes display dominant ferromagnetic exchange and spin ground states of S = 22, and the tetradecametallic complex displays dominant antiferromagnetic exchange and a spin ground state of S = 7 +/- 1. All display large (the former) and enormous (the latter) magnetocaloric effect-the former as a result of negligible zero-field splitting of the ground state, and the latter as a result of possessing a high spin-degeneracy at finite low temperatures-making them the very best cooling refrigerants for low-temperature applications. (literal)
  • The syntheses and structures of two decametallic mixed-valent Mn supertetrahedra using 2-amino-2-methyl-1,3-propanediol (ampH(2)), two decametallic mixed-valent Mn planar discs using 2-amino-2-methyl-1,3-propanediol (ampH(2)) and 2-amino-2-ethyl-1,3-propanediol (aepH(2)), and a tetradecametallic mixed-valent Mn planar disc using pentaerythritol (H(4)peol) are reported. The decametallic complexes display dominant ferromagnetic exchange and spin ground states of S = 22, and the tetradecametallic complex displays dominant antiferromagnetic exchange and a spin ground state of S = 7 +/- 1. All display large (the former) and enormous (the latter) magnetocaloric effect-the former as a result of negligible zero-field splitting of the ground state, and the latter as a result of possessing a high spin-degeneracy at finite low temperatures-making them the very best cooling refrigerants for low-temperature applications (literal)
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