Structure−Property Relations of Regiosymmetrical 3,4-Dioxy-Functionalized Polythiophenes
作者:Christian B. Nielsen、Thomas Bjørnholm
DOI:10.1021/ma051609t
日期:2005.12.1
from adapting a coplanar structure with a short π-stacking distance in the solid state. We furthermore show that incorporation of less space filling units in the form of unsubstituted thiophene units into the polymer chain reduces these unfavorable interactions and therefore allows for a more coplanar polymer backbone orientation and a shorter π-stacking distance in the solid state. These findings are
我们提出了合成和表征含有单和二烷基化的3,4-亚丙基二氧噻吩的新型均聚物和共聚物,目的是创建在聚合物电子学和光子学领域中要开发的新型π-共轭聚合物。我们表明,大的七元二氧杂环丁烷环连接到噻吩部分会导致不利的空间相互作用,尤其是在均聚物中;因此,它防止了聚合物在固态下以短的π堆积距离适应共面结构。我们进一步表明,将较少量的未取代噻吩单元形式的空间填充单元掺入到聚合物链中减少了这些不利的相互作用,因此允许在固态下更共面的聚合物主链取向和更短的π堆积距离。