کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1334243 1500227 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, structures and magnetocaloric properties of two dinuclear GdIII clusters derived from monocarboxylate ligands
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Synthesis, structures and magnetocaloric properties of two dinuclear GdIII clusters derived from monocarboxylate ligands
چکیده انگلیسی

Two dinuclear GdIII clusters, namely [Gd2(piv)6(phen)2] (1) and {[Gd2(2-TCA)6(phen)2]·2H2O} (2) (Hpiv = pivalic acid, 2-TCA = Thiophene-2-carboxylic acid and phen = 1,10-phenanthroline), have been synthesized under hydrothermal conditions. Complex 1 features dinuclear structure with two syn-syn-μ2-η1:η1 carboxylates bridging, while 2 exhibits dinuclear structure bridged by four carboxylates with syn-syn-μ2-η1:η1 and syn-syn-μ2-η1:η2 modes. Magnetic studies indicate that weak antiferromagnetic interactions between adjacent GdIII ions exist in 1 and 2. They exhibit relatively large magnetocaloric effects with −ΔSmmax = 19.1 J kg−1 K−1 and 21.8 J kg−1 K−1 for ΔH = 70 kOe, respectively, influenced by relatively high magnetic density and weak magnetic interaction.

Two carboxylate-based Gd2 clusters have been constructed through hydrothermal reaction. They exhibit relatively large magnetocaloric effect with −ΔSmmax > 19.0 J kg−1 K−1 affected by relatively weak magnetic interactions and high magnetic density.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 113, 27 July 2016, Pages 96–101
نویسندگان
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