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Structures and magnetic refrigeration properties of three Gd2 compounds.

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Title: Structures and magnetic refrigeration properties of three Gd2 compounds.
Authors: Niu, Hong-Jun1 (AUTHOR), Wang, Li-Hui1 (AUTHOR), Yang, Guan-E.1 (AUTHOR) yangguane@aliyun.com, Wang, Xiao-Xiao1 (AUTHOR) 15822083585@163.com
Source: Inorganica Chimica Acta. Apr2019, Vol. 489, p155-159. 5p.
Subjects: Magnetocaloric effects, Magnetic cooling, Magnetic properties, Magnetic structure
Abstract: Graphical abstract Three μ 2 -O bridged Gd 2 compounds display cryogenic magnetic refrigeration properties (−Δ S m = 19.13 J kg−1 K−1 for Δ H = 7 T at 2.0 K for 1 , −Δ S m = 21.06 J kg−1 K−1 for Δ H = 7 T at 2.0 K for 2 and −Δ S m = 25.73 J kg−1 K−1 for Δ H = 7 T at 2.0 K for 3). Highlights • Three new Gd 2 compounds have been synthesized. • The three Gd 2 compounds are μ 2 -oxido bridged dinuclear complexes. • The three Gd 2 compounds display cryogenic magnetic refrigeration properties. Abstract Three new Gd 2 compounds, namely [Gd 2 (dbm) 3 (L1) 2 CH 3 O]·2.5CH 3 OH (1), [Gd 2 (tmhd) 2 (L2) 2 (CH 3 O) 2 ] (2) and [Gd 2 (acac) 2 (L3) 2 (CH 3 O) 2 ] (3) (Hdbm = 1,3-dip henyl-1,3-propanedione, Htmhd = 2,2,6,6-tetramethyl-3,5-heptanedione and Hacac = acetylacetone), have been synthesized via a mixed ligands approach and structurally characterized. Magnetic studies reveal that 1 – 3 display cryogenic magnetic refrigeration properties (−Δ S m = 19.13 J kg−1 K−1 for Δ H = 7 T at 2.0 K for 1 , −Δ S m = 21.06 J kg−1 K−1 for Δ H = 7 T at 2.0 K for 2 and −Δ S m = 25.73 J kg−1 K−1 for Δ H = 7 T at 2.0 K for 3). [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Graphical abstract Three μ 2 -O bridged Gd 2 compounds display cryogenic magnetic refrigeration properties (−Δ S m = 19.13 J kg−1 K−1 for Δ H = 7 T at 2.0 K for 1 , −Δ S m = 21.06 J kg−1 K−1 for Δ H = 7 T at 2.0 K for 2 and −Δ S m = 25.73 J kg−1 K−1 for Δ H = 7 T at 2.0 K for 3). Highlights • Three new Gd 2 compounds have been synthesized. • The three Gd 2 compounds are μ 2 -oxido bridged dinuclear complexes. • The three Gd 2 compounds display cryogenic magnetic refrigeration properties. Abstract Three new Gd 2 compounds, namely [Gd 2 (dbm) 3 (L1) 2 CH 3 O]·2.5CH 3 OH (1), [Gd 2 (tmhd) 2 (L2) 2 (CH 3 O) 2 ] (2) and [Gd 2 (acac) 2 (L3) 2 (CH 3 O) 2 ] (3) (Hdbm = 1,3-dip henyl-1,3-propanedione, Htmhd = 2,2,6,6-tetramethyl-3,5-heptanedione and Hacac = acetylacetone), have been synthesized via a mixed ligands approach and structurally characterized. Magnetic studies reveal that 1 – 3 display cryogenic magnetic refrigeration properties (−Δ S m = 19.13 J kg−1 K−1 for Δ H = 7 T at 2.0 K for 1 , −Δ S m = 21.06 J kg−1 K−1 for Δ H = 7 T at 2.0 K for 2 and −Δ S m = 25.73 J kg−1 K−1 for Δ H = 7 T at 2.0 K for 3). [ABSTRACT FROM AUTHOR]
ISSN:00201693
DOI:10.1016/j.ica.2019.02.018