Diverse zinc(<scp>ii</scp>) coordination assemblies built on divergent 4,2′:6′,4′′-terpyridine derivatives: syntheses, structures and catalytic properties
作者:Guoqi Zhang、Yi-Xia Jia、Wenbo Chen、Wen-Feng Lo、Nyeisha Brathwaite、James A. Golen、Arnold L. Rheingold
DOI:10.1039/c4ra16441e
日期:——
revealed that although similar 1-D polymeric chains were observed in both 1 and 3, the 3-D packing modes were essentially different. The chains in 1 were stacked to form a network structure with microporous channels that were not present in 3. In contrast, 4 was a discrete dinuclear complex containing a paddle-wheel Zn2(μ-OAc)4} motif, although another minor component possibly coexists in the bulk sample
基于锌盐和包括两个新配体的四个4'-取代的4,2':6',4''-tpys的一系列金属-有机结构(化合物1-5)已经合成并进行了结构表征。在4,2':6',4''-tpy上带有各种4'-取代基的配体L1-L4与Zn(OAc)2 ·2H 2 O反应,生成含有1-D聚合物链的组件1-4(1-3)或离散的双核复合物(4)。X射线结构分析表明,尽管在1和3中都观察到了类似的1-D聚合物链,但是3-D堆积模式却本质上是不同的。1中的链条被堆叠形成一个具有微孔通道的网络结构,这些通道在3中不存在。相比之下,4是离散的双核复合物,包含桨轮Zn 2(μ-OAc)4 }主题,尽管PXRD研究显示,另一小成分可能共存于大块样品中。由L4和ZnI 2之间的反应制备5的晶体,其X射线结构显示出具有波状结构的1-D聚合物链。测试了纯相化合物1-3和5对乙酸苯酯与醇的催化酯交换反应,结果表明1是在该反应中最具活性的