Synthesis, structure and magnetic properties of a new one dimensional manganese coordination polymer constructed by a new asymmetrical ligand
Synthesis, structure and magnetic properties of a new one dimensional manganese coordination polymer constructed by a new asymmetrical ligand
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DOI：
10.1016/j.ica.2015.05.026
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发表时间：
2015-08-01
影响因子：
2.8
通讯作者：
Liu, Yuan-An
中科院分区：
文献类型：
--
作者：
Liu, Pan-Pan;Sheng, Li;Liu, Yuan-An
合成了一个新的五齿桥联配体2-羟基-N-（2-（3-羟基萘-2-基）亚甲基）氨基）乙基）苯甲酰胺（H3 L），该配体内部含有一个N2 O3配位点，配位点分别为一个酰胺基、一个亚胺基和两个苯氧基。通过与Mn（OAc）（2）中心点4 H（2）O反应，得到了一种新型的锯齿形五配位Mn（III）配位聚合物[MnL]（n），这是由于酰胺官能团的桥联作用。在293 K测定了[MnL]（n）的晶体结构，晶体属单斜晶系，空间群为P2（1）/c（编号14）：a = 16.0601（12）埃，B = 8.4048（6）埃，c = 12.7168（10）埃，β = 112.395（9），V = 1606.0（2）埃（3），Z = 4。磁性测试结果表明，Mn（III）配位聚合物中Mn中心之间通过酰胺桥存在反铁磁相互作用，在8.5 K时发生铁磁转变，并观察到自旋倾斜. (C)2015 Elsevier B. V.版权所有。
A new pentadentate chelate-bridging ligand possessing an inner N2O3 coordination site with one amide, one imine, and two phenoxo functions, 2-hydroxy-N-(2-(((3-hydroxynaphthalen-2-yl)methylene)amino)-ethyl)benzamide (H3L), was synthesised. Reaction it with Mn(OAc)(2)center dot 4H(2)O yielded a novel zigzag penta-coordinated Mn(III) coordination polymer, [MnL](n), due to the bridging ability of the amide function. The crystal structure of [MnL](n) has been determined at 293 K which crystallizes in the monoclinic space group P2(1)/c (No. 14): a = 16.0601(12) angstrom, b = 8.4048(6) angstrom, c = 12.7168(10) angstrom, beta = 112.395(9), V = 1606.0(2) angstrom(3), Z = 4. The experimental magnetic susceptibilities indicates the Mn(III) coordination polymer exhibits dominant antiferromagnetic interactions between the manganese centers through the amido bridge, and spin canting is observed with a ferromagnetic transition occurring at 8.5 K. (C) 2015 Elsevier B.V. All rights reserved.