Synthesis of poly[2]catenane having rigid linkage by 1,3-dipolar cycloaddition of diazido[2]catenane with 4,4′-diethynylbiphenyl
作者:Toshiki Hagiwara、Manabu Yamazaki、Tomohiro Suzuki、Takashi Sawaguchi、Shoichiro Yano
DOI:10.1016/j.polymer.2011.10.022
日期:2011.11
novel poly[2]catenane having rigid triazole rings between [2]catenane moieties was synthesized by the 1,3-dipolar cycloaddition of diazido[2]catenane with 4,4′-diethynylbiphenyl. The reaction proceeded effectively under mild conditions and gave a polymer in high yield. The number average molecular weight (Mn) of the polymers was 1.5 × 104–2.5 × 104. A cyclic dimer consisting of two [2]catenane moieties
通过在二叠氮基[2]环戊烷与4,4'-二乙炔基联苯的1,3-偶极环加成反应中合成了在[2]环戊烷部分之间具有刚性三唑环的新型聚[2]环戊烷。反应在温和条件下有效地进行,并以高收率得到聚合物。聚合物的数均分子量(M n)为1.5×10 4 –2.5×10 4。与聚合物一起形成了由两个[2]环戊烷部分和两个联苯撑单元组成的环状二聚体。通过在不降低聚合物的收率或分子量的情况下在低温下进行反应来抑制环二聚作用。新型聚[2]环戊烷在某些溶剂中的溶解度要高于相应的具有相似一级结构的未连接聚合物。