Oxoanion and cation effects on the structural morphology of coordination polymers incorporating a kinked organodiimine tethering ligand
Oxoanion and cation effects on the structural morphology of coordination polymers incorporating a kinked organodiimine tethering ligand
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DOI：
10.1039/b701102d
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发表时间：
2007-06
期刊：
影响因子：
3.1
通讯作者：
S. M. Krishnan;Niral M. Patel;Warren R. Knapp;R. M. Supkowski;R. LaDuca
中科院分区：
文献类型：
--
作者：
S. M. Krishnan;Niral M. Patel;Warren R. Knapp;R. M. Supkowski;R. LaDuca
二价钴盐与具有扭结和氢键能力的有机二亚胺4，4 ′-二吡啶胺（dpa）的结合提供了一类阴离子起决定性结构导向作用的配位聚合物。高氯酸盐的使用导致配位聚合物{[Co（H2O）2（dpa）2]（ClO 4）2·2 dpa·2 H2O}（1），其具有阳离子[M（H2O）2（dpa）2] n2 n+网格状层基序。未连接的高氯酸根阴离子，二苯丙酮分子，和结晶水分子位于初始菱形空隙。以硫酸钴或硝酸钴为金属源，合成了{[Co（dpa）2（H2O）（SO 4）]·2 H2O}（2）和{[Co（dpa）2（H2O）（NO3）]（NO3）}（3），它们具有类似的三维四重互穿[Co（dpa）2] n2 n+类金刚烷骨架。高氯酸镉衍生物{[Cd（H2O）2（dpa）2]（ClO 4）2·2 dpa·2 H2O}（4）显示出与1类似的二维聚合物结构。然而，4表现出与1不同的层堆叠模式，揭示了微妙的基于阳离子的结构导向效应。通过单晶X射线衍射、红外光谱和热重分析对所有材料进行了表征。
Combination of divalent cobalt salts with the kinked and hydrogen-bonding capable organodiimine 4,4′-dipyridylamine (dpa) has afforded a family of coordination polymers where the anion plays a determining structure directing role. Use of the perchlorate salt results in the coordination polymer {[Co(H2O)2(dpa)2](ClO4)2·2 dpa·2 H2O} (1), which possesses cationic [M(H2O)2(dpa)2]n2n+ grid-like layer motifs. Unligated perchlorate anions, dpa molecules, and water molecules of crystallization are situated within the incipient rhomboid voids. Employing cobalt sulfate or nitrate as the metal source afforded {[Co(dpa)2(H2O)(SO4)]·2 H2O} (2) and {[Co(dpa)2(H2O)(NO3)](NO3)} (3), which display related 3-D quadruply interpenetrated [Co(dpa)2]n2n+ adamantoid frameworks. The cadmium perchlorate derivative {[Cd(H2O)2(dpa)2](ClO4)2·2 dpa·2 H2O} (4) displays a 2-D polymeric structure similar to that of 1. However 4 manifests a different layer stacking pattern from that in 1, revealing a subtle cation-based structure-directing effect. All materials were characterized via single crystal X-ray diffraction, infrared spectroscopy, and thermogravimetric analysis.