树枝状聚合物具有众多端基和规整的球形结构,与传统的线形分子相比,在性能与应用声面均具有许多优势.设计和制备新的树枝状分子一直是高分子领域中的研究热点.将具有刺激响应性官能团引入到树枝状分子的结构中,可以赋予其特殊的性能,为此人们已合成了对pH值、温度、光、酶等外界刺激敏感的树枝状分子.
A series of novel dendrons and dendrimers skeleton-constructed with azobenzene moiety were synthesized with 4-carboxy-4'- (1,2-propanediolether) -azobenzene as an AB2 monomer and 4-carboxy-4'- ( n- butylether)-azobenzene as a peripheral monomer via a convergent approach and proceeding in a repeated step- wise growth manner. The NMR, GPC, and MALDI-TOF-MS measurements show that the obtained products possess regular molecular architecture and thus monodispersed molecular weights. It will be of interest to investigate the self assemble behavior of the polymers and the promising applications for the dendrimers as the dendritic boxes in the subsequent works.