Exploring the functional relation of magnetic density and magnetocaloric effect based on a dinuclear system. (1st June 2021)

• Record Type: Journal Article
• Authors: Liu, Zi‐Yuan; Huang, Xu‐Ke; Chen, Zi‐Lu; Liu, Dong‐Cheng; Zou, Hua‐Hong; Liang, Fu‐Pei
• Is Part Of: Applied organometallic chemistry. Volume 35:Number 9(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-06-01
• Subjects: functional relations -- magnetic density -- magnetocaloric effect -- molecular magnetic refrigerating material -- parameters of Mw/NGd or metal/ligand mass ratio; Organometallic chemistry -- Periodicals; Organometallic compounds -- Periodicals; 547.05
• DOI: 10.1002/aoc.6325
• Languages: English
• ISSNs: 0268-2605

Abstract

Abstract : Molecular magnetic refrigerating material is a kind of green and environmentally friendly materials, which achieve the purpose of cooling by its magnetocaloric effect. Magnetic density is crucial to the magnetocaloric effect of the complexes, and it is usually described by the parameters of M w / N Gd or metal/ligand mass ratio, which represents the content of Gd (III) in the complexes. In order to establish the functional relation between these parameters and magnetocaloric effect, doping is a credible method without changing the coordination environment of the system, which is realized by the process of increasing Gd (III) gradually in the diamagnetic complex. Hence, a diamagnetic dinuclear Y 2, four doped samples Gd 0.24 Y 1.76, Gd 0.51 Y 1.49, Gd 1.04 Y 0.96, and Gd 1.46 Y 0.54, and a pure dinuclear Gd 2 were synthesized and characterized. Through the measurement of magnetic properties and data fitting, the functional relations were obtained between these parameters and −Δ S m in this dinuclear system. It is the first time that the relationships are set up via experimental design, and it will contribute to observation and comprehension of how magnetic density affects the magnetocaloric effect. In addition, the −Δ S m of dinuclear Gd 2 is 29.96 J kg −1 K −1, which is higher than most of the reported dinuclear Gd (III)‐based complexes. Abstract : The relation curves between the parameters of magnetic density and the magnetothermal entropy were set up by gradual introduction of Gd (III) ions to diamagnetic complex.