Hexagonal Co6 and zigzag Co4 cluster based magnetic MOFs with a pcu net for selective catalysis†,Inorganic Chemistry Frontiers

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Hexagonal Co6 and zigzag Co4 cluster based magnetic MOFs with a pcu net for selective catalysis†
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2015-11-04 00:00:00 , DOI: 10.1039/c5qi00159e
Ru-Xin Yao _{1,

2,

3,

4} , Xiao-Hui Qiao _{1,

2,

3,

4} , Xin Cui _{1,

2,

3,

4} , Xiao-Xia Jia _{1,

2,

3,

4} , Xian-Ming Zhang _{1,

2,

3,

4}

Affiliation

Two hydrophobic 3D cobalt-cluster based magnetic MOFs, [Co₃(pimdc)₂(H₂O)₆]·5H₂O (1) and Co₂(Hpimdc)₂ (2) (H₃pimdc = 2-propyl-imidazole-4,5-dicarboxylic acid), have been hydrothermally synthesized and magnetically characterized. Both of them exhibit a regular pcu net with hexagonal Co₆ and zigzag Co₄ clusters as 6-connected nodes, respectively. The magnetic studies indicate that 1 displays predominant antiferromagnetic interactions within the Co₃(pimdc) triangle, while 2 shows spin-canting antiferromagnetic behaviour with larger canting angles. Furthermore, after heating under vacuum conditions, activated 1 exhibits an excellent catalytic selectivity in the allylic oxidation reaction of cyclohexene to form an α,β-unsaturated ketone, which indicates that the opened Co(II) sites play a significant role in the heterogeneous catalytic process.

中文翻译：

基于六角形Co ₆和之字形Co ₄簇的磁性MOF，带有pcu网用于选择性催化†

两个基于疏水性3D钴簇的磁性MOF，[Co ₃（pimdc）₂（H ₂ O）₆ ]·5H ₂ O（1）和Co ₂（Hpimdc）₂（2）（H ₃ pimdc = 2-propyl-咪唑（4,5-二羧酸）已被水热合成并进行了磁学表征。两者显示出常规PCU净具有六角形钴₆和锯齿钴₄簇6连接的节点，分别。磁性研究表明1在Co _3中显示出主要的反铁磁相互作用（pimdc）三角形，而2则显示具有较大倾斜角度的自旋倾斜反铁磁行为。此外，在真空条件下加热后，活化的1在环己烯的烯丙基氧化反应中形成α，β-不饱和酮表现出极好的催化选择性，这表明打开的Co（II）位在非均相催化中起着重要作用。过程。

更新日期：2015-11-04

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