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- W1963754464 abstract "Two ferromagnetic μ-oxoacetate-bridged gadolinium complexes [Gd2(OAc)2(Ph2acac)4(MeOH)2] (1) and [Gd4(OAc)4(acac)8(H2O)4] (2) and two polymeric Gd(III) chains [Gd(OAc)3(MeOH)]n (3) and [Gd(OAc)3(H2O)0.5]n (4) (Ph2acacH = dibenzoylmethane; acacH = acetylacetone) are reported. The magnetic studies reveal that the tiny difference in the Gd–O–Gd angles (Gd···Gd distances) in these complexes cause different magnetic coupling. There exist ferromagnetic interactions in 1–3 due to the presence of the larger Gd–O–Gd angles (Gd···Gd distances), and antiferromagnetic interaction in 4 when the Gd–O–Gd angle is smaller. Four gadolinium acetate derivatives display large magnetocaloric effect (MCE). The higher magnetic density or the lower MW/NGd ratio they have, the larger MCE they display. Complex 4 has the highest magnetic density and exhibits the largest MCE (47.7 J K–1 kg–1). In addition, complex 3 has wider temperature and/or field scope of application in refrigeration due to the dominant ferromagnetic coupling. Moreover, the statistical thermodynamics on entropy was successfully applied to simulate the MCE values. The results are quite in agreement with those obtained from experimental data." @default.
- W1963754464 created "2016-06-24" @default.
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- W1963754464 date "2011-12-06" @default.
- W1963754464 modified "2023-10-12" @default.
- W1963754464 title "Polynuclear and Polymeric Gadolinium Acetate Derivatives with Large Magnetocaloric Effect" @default.
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- W1963754464 doi "https://doi.org/10.1021/ic2018314" @default.
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