Bisthiophene/triazole based 4,6-diamino-1,3,5-triazine triblock polyphiles: Synthesis, self-assembly and metal binding properties
Bisthiophene/triazole based 4,6-diamino-1,3,5-triazine triblock polyphiles: Synthesis, self-assembly and metal binding properties
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基于双噻吩/三唑的 4,6-二氨基-1,3,5-三嗪三嵌段亲聚剂：合成、自组装和金属结合特性
DOI：
10.1016/j.molstruc.2019.05.038
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发表时间：
2019-10-05
影响因子：
3.8
通讯作者：
Cheng, Xiaohong
中科院分区：
文献类型：
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作者：
Liu, Chao;Gao, Hongfei;Cheng, Xiaohong
合成了两个系列的4，6-二氨基-1，3，5-三嗪三嵌段亲聚物，其一端为具有柔性烷基链的双噻吩/三唑刚性核，另一端为极性的4，6-二氨基-1，3，5-三嗪。所有基于双噻吩的4，6-二氨基-1，3，5-三嗪衍生物都显示出Col（hex）/p6 mm中间相，而相应的基于三唑的4，6-二氨基-1，3，5-三嗪衍生物可以形成Col（hex）/p6 mm和Cub（1）/pm（3）over barn中间相。基于FT-IR测量获得了三唑基化合物中中心三唑单元和末端4，6-二氨基三嗪基团之间形成额外氢键的证据，该氢键是三唑基化合物中立方相形成的原因。此外，这些三嵌段亲聚物可以在不同的溶剂中形成具有感兴趣的形态的有机凝胶。系统地研究了烷基链长和杂环（双噻吩/三唑）的极性对这些化合物自组装的影响。最后，这些三嵌段亲聚物显示出对Pb 2+和Fe 3+离子的双重选择性。(C)2019 Elsevier B. V.版权所有。
Two series of 4,6-diamino-1,3,5-triazine triblock polyphiles consisting of an extremely long bisthiophene/triazole based rigid cores, with flexible alkyl chains at one end and a polar 4,6-diamino-1,3,5-triazine at the other end were synthesized. Col(hex)/p6mm mesophases were displayed by all bisthiophene based 4,6-diamino-1,3,5-triazine derivatives, whereas both Col(hex)/p6mm and Cub(1)/pm (3) over barn mesophases could be formed by corresponding triazole based 4,6-diamino-1,3,5-triazine derivatives. Evidence for the formation of the extra H-bonding between central triazole units and terminal 4,6-diaminotriazine groups which was responsible for the formation of cubic phases in triazole based compounds was obtained based on FT-IR measurements. Additionally, these triblock polyphiles can form organogels with interesting morphologies in different solvents. The influence of the alkyl chain length and the polarities of the heterocycles (bisthiophene/triazole) on the self-assembly of these compounds was systematically studied. Finally, these triblock polyphiles showed dual selectivities towards Pb2+ and Fe3+ ions. (C) 2019 Elsevier B.V. All rights reserved.