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Coordination Chemistry of Cyclohexane-1,2,4,5-tetracarboxylate (H4L). Synthesis, Structure, and Magnetic Properties of Metal-Organic Frameworks with Conformation-Flexible H4L Ligand
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2009-03-26 00:00:00 , DOI: 10.1021/cg801348n
Jing Wang 1 , Yong-Cong Ou 1 , Yong Shen 1 , Lei Yun 1 , Ji-Dong Leng 1 , Zhuojia Lin 1 , Ming-Liang Tong 1
Affiliation  

To study the conformations and coordination chemistry of cyclohexane-1,2,4,5-tetracarboxylic acid (H4L), we have obtained four new coordination polymers, [Mn24-LI)(H2O)6] (1), [Mn28-LI)(H2O)2] (2), [Mn27-LII)(H2O)3] (3), and [Ag4(LI)(4,4′-bpy)3]·10H2O (4), from the reactions of Mn(II) or Ag(I) salts with cyclohexane-1e,2a,4a,5e-tetracarboxylic acid (2e+2a, H4LI). A new conformation, cyclohexane-1e,2a,4e,5e-tetracarboxylate (3e+1a, LII), was derived from conformational conversions of LI and trapped in 3 upon coordination by controlling the hydrothermal reaction conditions. The stabilization and separation of different conformations of the flexible organic ligands in coordination structures may help us understand and utilize various interesting conformational transformations. Magnetic studies show that antiferromagnetic interaction occurs in both 1 and 2.

中文翻译:

1,2,4,5-四羧酸环己烷酯(H 4 L)的配位化学。构型柔性H 4 L配体的金属有机骨架的合成,结构和磁性

为了研究环己烷-1,2,4,5-四羧酸的构象和配位化学(H 4大号),我们获得的四个新的配位聚合物,[锰2(μ 4 -大号)(H 2 O)6 ](1),[锰2(μ 8 -大号)(H 2 O)2 ](2),[锰2(μ 7 -大号II)(H 2 O)3 ](3),以及将[Ag 4大号)(4,4'-联吡啶)3 ]·10H 2 O(4),选自Mn(II)或Ag的反应(I)盐与环己烷ë,2,4,5 ë四甲酸(2 e +2 a,H 4 L I)。从L I的构象转化中获得了一个新的构象,即环己烷1 e,2 a,4 e,5 e-四羧酸盐(3 e +1 aL II),并被困在3通过控制水热反应条件来协调。配位结构中柔性有机配体的不同构象的稳定和分离可以帮助我们理解和利用各种有趣的构象转化。磁性研究表明,在12中都发生反铁磁相互作用。
更新日期:2009-03-26
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