Synthesis of highly functionalised dendrimers based on polyhedral silsesquioxane cores †
作者:Paul-Alain Jaffrès、Russell E. Morris
DOI:10.1039/a801510d
日期:——
A number of dendrimers based on polyhedral silsesquioxane cores have been synthesised and characterised. The new molecules are prepared by repetitive hydrosilation/alkenylation reactions, which provide a facile and high yield route to dendrimers with a high density of branch ends per generation. Judicious choice of hydrosilating agent [HSiCl3, H(CH3)SiCl2 or H(CH3)2SiCl] produces dendrimers with varying numbers of chain ends, and alkenylating agents of different lengths produce molecules with different physical properties. The 24-vinyl functionalised dendrimer, 5, has been characterised using single-crystal X-ray diffraction techniques.
我们合成了一些以多面体硅倍半氧烷为核心的树枝状聚合物,并对其进行了表征。新分子是通过重复的氢化/烯化反应制备的,这为每一代具有高密度分支末端的树枝状聚合物提供了一条简便、高产的途径。对水硅化剂[HSiCl3、H(CH3)SiCl2 或 H( )2SiCl]的明智选择可制备出具有不同链端数量的树枝状聚合物,而不同长度的烯化剂可制备出具有不同物理性质的分子。使用单晶 X 射线衍射技术对 24-乙烯基官能化树枝状聚合物 5 进行了表征。