Poly(benzyl ether) dendrons without conventional gelation motifs as a new kind of effective organogelators

• 来源期刊: 科学通报(英文版)
• 学科: 化学
• 年，卷（期）: 2012,（33）
• 页码范围: 4289-4295
• 页数: 7页
• 分类号: O631.3
• 语种: 中文

摘要

Two poly(benzyl ether) dendrons,decorated in their periphery with nitrile groups,were divergently synthesized and fully characterized.Their gelation properties were studied by using scanning electron microscopy(SEM),X-ray crystal structure analysis and concentration-and temperature-dependent 1 H NMR spectroscopy.It was found that the gelation capability of these dendrons was highly dependent on dendron generation,and the second-generation dendron G 2-CN proved to be highly efficient organogelator despite the lacking of any conventional gelation motifs,such as amides,long alkyl side chains and steroidal groups.The multiple strong-stacking interactions and hydrogen bonding interactions due to the peripheral isophthalonitrile motifs were proved to be the main driving forces to form the self-assembled gel.