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

作　　者：FENG Yu LIU ZhiXiong WANG LiYing CHEN Hui HE YanMei FAN QingHua 

机构地区：[1]Beijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Molecular Recognition and Function,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Chinese Science Bulletin》2012年第33期4289-4295,共7页

基　　金：supported by the National Natural Science Foundation of China (21074140 and 91027046);Institute of Chemistry,Chinese Academy of Sciences

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.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 1H NMR spectroscopy. It was found that the gelation capability of these dendrons was highly dependent on dendron generation, and the second-generation dendron G2-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 π-π 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.

关 键 词：凝胶化性能 树状分子 图案 苯醚 传统 晶体结构分析 电子显微镜 NMR光谱 

分 类 号：O631.3[理学—高分子化学]