Synthesis, Chiroptical Behavior, and Sensing of Carboxylic Acid Functionalized Poly(phenylene ethynylene-<i>alt</i>-bithiophene)s
作者:Steven Vandeleene、Michiel Verswyvel、Thierry Verbiest、Guy Koeckelberghs
DOI:10.1021/ma101816z
日期:2010.9.28
Several poly(phenylene ethynylene-alt-bithiophene)s with (chiral) nonfunctionalized substituents were synthesized with a variable phenylene ethynylene (PE) spacer length (up to 4 repeating units). The chiroptical behavior was evaluated with UV−vis and circular dichroism (CD) spectroscopy, revealing a highly solvent-sensitive aggregate formation. Based on this high sensitivity, both chiral and achiral
几种聚亚苯基乙炔盐用可变的亚苯基亚乙炔基(PE)间隔区长度(最多4个重复单元)合成了具有(手性)未官能化取代基的β-联噻吩。通过紫外可见光谱和圆二色性(CD)光谱对手性行为进行了评估,揭示了高度溶剂敏感的聚集体形成。基于这种高灵敏度,制备了手性和非手性羧酸官能化的类似物,其连接羧酸和聚合物主链的间隔基的长度是变化的。UV-vis,CD和发射光谱的组合显示,手性胺对溶液和薄膜中的官能化聚合物具有明显的亲和力。然而,根据羧酸官能化的侧链的长度,观察到聚合物的不同的超分子行为。