کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1335999 1500291 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Substituting group induced structural transformation from 1D zigzag chain to 2D grid network in cyano-bridged dimetallic complexes derived from MnIII(Schiff-base) and [CrI(CN)5NO]3−: Synthesis, crystal structure and magnetic properties
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Substituting group induced structural transformation from 1D zigzag chain to 2D grid network in cyano-bridged dimetallic complexes derived from MnIII(Schiff-base) and [CrI(CN)5NO]3−: Synthesis, crystal structure and magnetic properties
چکیده انگلیسی

Two cyano-bridged dimetallic complexes derived from MnIII(Schiff-base) and [CrI(CN)5NO]3−, [Mn(3-CH3)salen]3[Cr(CN)5NO]·2.5H2O (1) and [Mn(5-CH3)salen]6[Cr(CN)5NO]2·2CH3OH·16H2O (2) [salen = N,N′-ethylenebis (salicylideneiminato)dianion] were synthesized and characterized. The reaction conditions of the two complexes are identical. The substituting group (CH3–) in the salen-type ligands gives different assembly styles for the two complexes, 1D zigzag chain for 1 while 2D grid network for 2. The magnetic investigation indicates the dominant antiferromagnetic interactions between the Mn(III) and Cr(I) mediated by the CN bridge. Due to the weak interchain antiferromagnetic interactions, no magnetic ordering phase was observed in complex 1. Interestingly, complex 2 showed the long range ferrimagnetic magnetic ordering with Tc = 9 K, in contrast to 1. Furthermore, the hysteresis loop confirms the nature of complex 2 as soft ferrimagnet.

Two cyano-bridged dimetallic complexes derived from MnIII(Schiff-base) and [CrI(CN)5NO]3−, [Mn(3-CH3)salen]3[Cr(CN)5NO]·2.5H2O (1), [Mn(5-CH3)Salen]6[Cr(CN)5NO]2·2CH3OH·16H2O (2) (salen = N,N′-ethylenebis(salicylideneiminato)dianion) are synthesized and characterized. Structural analysis indicates 1D zigzag chain for 1 while 2D grid network for 2. Magnetic investigation reveals that 1 behaves as a simple magnetic chain, while 2 is a ferrimagnet below 9 K.Figure optionsDownload as PowerPoint slideHighlights
► Proving the importance of substituting group effect in the design of molecular magnets.
► Interesting 1D zigzag chain and 2D grid network.
► The long range ferrimagnetic ordering is observed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 30, Issue 18, 28 November 2011, Pages 3158–3164
نویسندگان
, , , , ,