Several [Gd-M] Heterometal–Organic Frameworks with [Gdn] as Nodes: Tunable Structures and Magnetocaloric Effect

Tunable structures and magnetocaloric effect (MCE) of seven MOFs with [Gdn] as nodes are explored. The [Gdn] node is realized from mononuclear [Gd] to binuclear paddle-wheel [Gd2], tetranuclear tetrahedral [Gd4], and pentanuclear trigonal bipyramidal [Gd5]. Meanwhile, the magnetic entropy changes fr...

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Veröffentlicht in:Inorganic chemistry 2017-08, Vol.56 (15), p.9169-9176
Hauptverfasser: Shi, Peng-Fei, Cao, Chun-Shuai, Wang, Chu-Ming, Zhao, Bin
Format: Artikel
Sprache:eng
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Zusammenfassung:Tunable structures and magnetocaloric effect (MCE) of seven MOFs with [Gdn] as nodes are explored. The [Gdn] node is realized from mononuclear [Gd] to binuclear paddle-wheel [Gd2], tetranuclear tetrahedral [Gd4], and pentanuclear trigonal bipyramidal [Gd5]. Meanwhile, the magnetic entropy changes from 19.4 to 46.0 J·kg–1·K–1. The results reveal that the effect of magnetic density on MCE plays a dominant role for Gd3+-based compounds, and high spin ground state of Mn2+ (S = 5/2) is more favorable to achieve high MCE than that with Zn2+, Co2+, and Ni2+ (Co2+, S = 3/2; Ni2+, S = 1). To our knowledge, it is the first report that MCE is controlled by various clusters as nodes in MOFs.
ISSN:0020-1669
1520-510X
DOI:10.1021/acs.inorgchem.7b01209