Two-electron redox-active tricyano iron(ii) complex with 2,4,6-tris(2-pyrimidyl)-1,3,5-triazine as a building block for coordination polymers
Two-electron redox-active tricyano iron(ii) complex with 2,4,6-tris(2-pyrimidyl)-1,3,5-triazine as a building block for coordination polymers
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双电子氧化还原活性三氰基铁(ii)络合物与2,4,6-三(2-嘧啶基)-1,3,5-三嗪作为配位聚合物的构建单元
DOI：
10.1039/c8dt02315h
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发表时间：
2018
影响因子：
4
通讯作者：
Oshio Hiroki
中科院分区：
文献类型：
--
作者：
Shiga Takuya;Miyamoto Haruka;Newton Graham N.;Oshio Hiroki
以2，4，6-三（2-嘧啶基）-1，3，5-三嗪（L）为封端配体，通过摩尔盐反应合成了一种新的三氰基铁（II）构筑单元[{K（H2O）4}{FeII（CN）3（L）}]·3 H2O（1）. X-射线衍射分析表明，单核三氰基铁（II）配合物由一个配体和三个氰化物基团组成，K+离子在相邻单元之间配位形成一维链状网络结构。图1显示了两个可逆的氧化还原波，分别为+0.713和-0.849 V vs. SCE，分别指定为Fe（II）/Fe（III）和L/L stec −过程。以1为构筑单元，合成了一维4，2-带状链状配位聚合物[MII（H2O）2{FeII（CN）3（L）}2]·6 H2O（M = Fe（2）和Mn（3））.低温磁性研究表明，2和3分别显示S = 2和5/2的顺磁性行为。另一方面，1与Gd（NO3）3·6 H2O反应形成另一个一维链[GdIII（NO3）2（H2O）3{FeII（CN）3（L）}]·0.5H2O·2CH 3OH（4），表现出S = 7/2的顺磁行为。
A new tricyano iron(II) building unit, [{K(H2O)4}{FeII(CN)3(L)}]·3H2O (1), was synthesized by the reaction of Moor's salts with 2,4,6-tris(2-pyrimidyl)-1,3,5-triazine (L) as a capping ligand. X-ray structural analysis reveals that the mononuclear iron(II) tricyano complex consists of one ligand and three cyanide groups, with K+ ions coordinated between neighboring units to form a one-dimensional chain network structure. 1 shows two reversible redox waves at +0.713 and −0.849 V vs. SCE, which are assigned as Fe(II)/Fe(III) and L/L˙− processes, respectively. One-dimensional 4,2-ribbon chain type coordination polymers, [MII(H2O)2{FeII(CN)3(L)}2]·6H2O (M = Fe (2) and Mn (3)), were synthesized by using 1 as a building unit. Cryomagnetic studies reveals that 2 and 3 show paramagnetic behaviour of S = 2 and 5/2, respectively. On the other hand, reaction of 1 and Gd(NO3)3·6H2O forms another one-dimensional chain, [GdIII(NO3)2(H2O)3{FeII(CN)3(L)}]·0.5H2O·2CH3OH (4), showing S = 7/2 paramagnetic behaviour.