کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1338801 979681 2010 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Syntheses, crystal structures and electron paramagnetic resonance studies of CoII- and MnII-coordination polymers with the twisted ligand di(4-pyridyl)disulfide in double bridge fashion
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Syntheses, crystal structures and electron paramagnetic resonance studies of CoII- and MnII-coordination polymers with the twisted ligand di(4-pyridyl)disulfide in double bridge fashion
چکیده انگلیسی
Four coordination polymers, {[Co2(4-DPSS)4(DMF)4](ClO4)4}n (1), {[Mn2(4-DPSS)4(DMF)4](ClO4)4}n (2), {[Co(4-DPSS)2(H2O)(NO3)]NO3·3H2O}n (3) and [Co(4-DPSS)2(NCS)2]n (4) were synthesized by reaction between the cobalt (II) and manganese (II) salts (perchlorate, thiocyanate and nitrate) and the flexible ligand di(4-pyridyl)disulfide (4-DPSS). All the compounds presented repeated rhomboidal structures in which the di(4-pyridyl)disulfide ligands coordinate the metal centers in a double bridged fashion. The crystal packing of these coordination polymers reveals that, in all cases, weak interactions such as classical and non-classical hydrogen bonds, as well as S⋯S interactions, connect the polymeric chains to increase the dimensionality of the network. Low-temperature electron paramagnetic resonance (EPR) measurements on powdered samples show that the transition-metal ions, Co (II) and Mn (II) ions, are in the high spin states S = 3/2 and 5/2, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 29, Issue 13, 3 September 2010, Pages 2657-2666
نویسندگان
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