کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1311769 975353 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structures and magnetic properties of one-dimensional polymers constructed with copper(II) salts and pyridinecarboxamide-type ligands
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Structures and magnetic properties of one-dimensional polymers constructed with copper(II) salts and pyridinecarboxamide-type ligands
چکیده انگلیسی

Three complexes of the composition {[Cu(μ1,5-dca)2(mppca)2] · H2O}n (1), [Cu(μ1,5-dca)2(nppca)2]n (2) and [Cu(μ-Cl)2(mppca)2]n (3) (dca = dicyanamide, N(CN)2-; mppca = N-(4′-methylphenyl)-4-pyridinecarboxamide; nppca = N-(4′-nitrophenyl)-4-pyridinecarboxamide) have been synthesized and characterized by single crystal X-ray crystallography and magnetic susceptibility studies. Different supramolecular structures of the complexes have been constructed by different non-covalent motifs in the crystalline solids. In complex 1, adjacent copper(II) atoms are connected by double μ1,5-dca(end-to-end) bridges to form a chain-like structure. The chains are linked by π–π interactions and hydrogen bonds between the ligands and water molecules to form a 3D network. In complex 2, copper(II) atom has a coordination environment similar to 1, but water molecules have not been found. Weak C–H⋯N hydrogen bonding and π–π interaction yield a 3D supramolecular network which is different from that of complex 1. Complex 3 is a 1D polymeric chain in which Cu(II) ions are bridged by Cl−, and only CH/π interactions had been found. Magnetic measurements revealed antiferromagnetic properties of 1, 3 and ferromagnetic behavior of 2.

Three N(CN)2- or Cl− bridged 1D copper(II) complexes have been synthesized with the pyridinecarboxamide ligand. The pyridinecarboxamide ligands exhibit interesting intermolecular contacts. Temperature dependence of magnetic susceptibilities of the complexes has been studied.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Inorganica Chimica Acta - Volume 359, Issue 2, 20 January 2006, Pages 541–547
نویسندگان
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