Second‐Generation Supramolecular Dendrimer with a Defined Structure due to Orthogonal Binding
作者:Jens Eckelmann、Christiane Dethlefs、Stefan Brammer、Ahmet Doğan、Andreas Uphoff、Ulrich Lüning
DOI:10.1002/chem.201200181
日期:2012.7.2
A second‐generation supramolecular dendrimer has been prepared by orthogonal multiple hydrogen bonding. In the first (inner) recognition domain, the interaction of one bis‐isocyanuric acid (25) with two branching units (21) that carry complementary Hamilton receptors has been exploited. In the second (outer) generation, the two ADDA (A=hydrogen‐bond acceptor, D=donor) receptors of each branching unit
通过正交多重氢键制备了第二代超分子树状聚合物。在第一个(内部)识别域中,已利用了一个双异氰尿酸(25)与两个带有互补汉密尔顿受体的分支单元(21)的相互作用。在第二代(外部)中,每个分支单元(21个)的两个ADDA(A =氢键受体,D =供体)受体结合了互补的DAAD单元(4)。通过引入支链乙基己基残基和使用柔性亚烷基或低聚(乙二醇)连接链,已经克服了结构单元的溶解度有限的问题。通过化学诱导位移NMR滴定阐明了两个氢键对的正交结合,证明了这两个对具有汉密尔顿受体的异氰尿酸和具有DAAD的ADDA优先结合。通过扩散NMR光谱研究了分子量为5065 g mol -1的超分子自组装1:2:4树枝状大分子的形成。