Bilayers, corrugated bilayers, and coordination polymers of p-sulfonatocalix[6]arene
Bilayers, corrugated bilayers, and coordination polymers of p-sulfonatocalix[6]arene
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DOI：
10.1021/ic0493595
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发表时间：
2004-10-04
影响因子：
4.6
通讯作者：
Raston, CL
中科院分区：
文献类型：
--
作者：
Dalgarno, SJ;Hardie, MJ;Raston, CL
对磺化杯[6]芳烃与吡啶N - 氧化物以及4,4'-联吡啶N,N'-二氧化物的主 - 客体超分子化学的研究，得到了三种新的结构基元，其中杯芳烃呈“上下”双部分锥构象。两种是由吡啶N - 氧化物与镍或镧系金属抗衡离子形成的氢键网络结构（分别为1和2）。配合物1在六水合镍(II)抗衡离子存在的情况下，显示出吡啶N - 氧化物与杯芳烃之间的主 - 客体相互作用。配合物2展示了涉及杯芳烃和吡啶N - 氧化物的不同镧系元素的选择性配位模式。第三种结构3是一种配位聚合物，由4,4'-联吡啶N,N'-二氧化物分子形成，这些分子跨越一个亲水层并连接镧系/对磺化杯[6]芳烃片段。尽管配合物1 - 3中杯芳烃都呈“上下”双部分锥构象，但1和3在扩展结构内形成双层排列，而2形成一种以前未见过的褶皱双层排列。
Exploration into the host-guest supramolecular chemistry of p-sulfonatocalix[6]arene with pyridine N-oxide and 4,4'-dipyridine N,N'-dioxide has resulted in the characterization of three new structural motifs with the calixarene in the "up-down" double partial cone conformation. Two are hydrogen-bonded network structures formed with pyridine N-oxide and either nickel or lanthanide metal counterions (1 and 2, respectively). Complex 1 displays host-guest interactions between pyridine N-oxide and the calixarene in the presence of hexaaquanickel(II) counterions. Complex 2 demonstrates selective coordination modes for different lanthanices involving the calixarene and pyridine N-oxide. The third structure, 3, is a coordination polymer which is formed with 4,4'-dipyridine N,N'-dioxide molecules which span a hydrophilic layer and join lanthanide/p-sulfonatocalix[6]arene fragments. Although complexes 1-3 all have the calixarene in the "up-down" double partial cone conformation, 1 and 3 form bilayer arrangements within the extended structures while 2 forms a previously unseen corrugated bilayer arrangement.