کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1310356 | 975243 | 2007 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Europium (III) complexes derived from carboxylic-substituted polychlorotriphenylmethyl radicals Europium (III) complexes derived from carboxylic-substituted polychlorotriphenylmethyl radicals](/preview/png/1310356.png)
Two europium (III) complexes (3 and 4) have been obtained reacting europium (III) nitrate and two polychlorotriphenylmethyl radicals properly functionalized with one (PTMMC−, 1) and six (PTMHC6−, 2) carboxylate groups, respectively. While complex 3 reveals a lamellar polar–apolar separated ion pair structure alternating PTM-based bilayers with nonaaquaeuropium cations ([Eu(H2O)9](PTMMC)3(PTMMCH)3 · 7H2O · 6EtOH), complex 4 shows a one-dimensional chain-like structure with formula [Eu2(PTMHC)(H2O)13] · 16H2O · EtOH. Magnetic properties of both complexes were studied in the 2–300 K range, and show the presence of weak inter-radical antiferromagnetic interactions below 5 K.
Two europium (III) complexes were obtained by reacting polychlorotriphenylmethyl (PTM) radicals functionalized with one and six carboxylate groups with europium (III) nitrate. The compound obtained with the mono-carboxylate ligand shows a polar–apolar lamellar crystal structure, whereas the complex with the hexa-carboxylate radical has a one-dimensional polymeric structure. The magnetic properties of both complexes were studied, and reveal the presence of weak inter-radical antiferromagnetic interactions at low temperatures.Figure optionsDownload as PowerPoint slide
Journal: Inorganica Chimica Acta - Volume 360, Issue 13, 1 October 2007, Pages 3861–3869