Click‐Functionalization of a Poly(Tetrazine‐co‐Fluorene)‐Conjugated Polymer with a Series of
<i>trans</i>
‐Cyclooctene Derivatives
作者:Vladimir Kardelis、Maria M. Denk、Alex Adronov
DOI:10.1002/anie.202010795
日期:2021.2.8
polycondensation of 3,6‐bis(5‐bromofuran‐2‐yl)‐1,2,4,5‐tetrazine and a fluorene diboronate derivative. It can undergo efficient and quantitative post‐polymerization inverse‐electron‐demand Diels–Alder click reactions with a variety of trans‐cyclooctene (TCO) derivatives. The resulting polymers were oxidized to convert dihydropyridazine rings into pyridazines. The absorption spectra of the product polymers
通过3,6-双(5-溴呋喃-2-基)-1,2,4,5-四嗪和芴二硼酸酯衍生物的Suzuki缩聚反应制得可溶的聚(四嗪)聚合物。它可以通过各种反式反应进行高效且定量的聚合后逆电子需求Diels-Alder点击反应环辛烯(TCO)衍生物。氧化所得聚合物以将二氢哒嗪环转化为哒嗪。在氧化之前和之后,产物聚合物的吸收光谱显示出与附接的侧链的空间位阻相关的七色位移。相对于原始的聚四嗪,它们还表现出显着增强的荧光强度。凝胶渗透色谱法表明产物聚合物表现出更长的保留时间,而NMR端基分析表明聚合物保持相对恒定的聚合度。通过与TCO官能化的聚(乙二醇)链反应可轻松制备接枝共聚物,并使聚(四嗪)与bis-TCO交联剂反应可制得交联泡沫。