Highly cooperative formation of bis-urea based supramolecular polymers
Highly cooperative formation of bis-urea based supramolecular polymers
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DOI：
10.1021/ja037589x
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发表时间：
2003-10-29
影响因子：
15
通讯作者：
Jalabert, M
中科院分区：
文献类型：
--
作者：
Simic, V;Bouteiller, L;Jalabert, M
本文合成了十一种双脲类化合物，并报道了它们的一些性质。这些化合物中的几种在有机溶剂中形成超分子聚合物。红外光谱表明，自缔合在两个层次上显示协同效应。第一级协同性是由于单个分子的两个脲官能团的协同缔合。第二个层次的协同性揭示了这样一个事实，即形成二聚体是不太有利的比长的寡聚体。
Eleven bis-ureas have been synthesized, and some of their properties are reported. Several of these compounds form supramolecular polymers in organic solvents. The self-association is shown by FTIR spectroscopy to display cooperativity at two levels. The first level of cooperativity is due to the synergistic association of the two urea functions of a single molecule. The second level of cooperativity is revealed by the fact that the formation of dimers is less favored than that of long oligomers.