Enhancing Insulated Conjugated Polymer Fluorescence Quenching by Incorporating Dithia[3.3]paracyclophanes
作者:Ryan Lillis、Maximillian R. Thomas、Manikandan Mohanan、Nagarjuna Gavvalapalli
DOI:10.1021/acs.macromol.1c00136
日期:2021.4.13
Insulated π-conjugated polymers exhibit enhanced chemical stability, photostability, fluorescence quantum yield, electroluminescence, solubility, and intrachain charge transport. However, insulated polymer fluorescence quenching by acceptor molecules is significantly hampered as the π-face is insulated. Photoinduced charge transfer is one of the key steps in amplified fluorescence quenching sensors and organic
绝缘的π-共轭聚合物表现出增强的化学稳定性,光稳定性,荧光量子产率,电致发光,溶解度和链内电荷传输。然而,由于π面是绝缘的,受受体分子的绝缘的聚合物荧光猝灭被显着地阻碍。光诱导的电荷转移是放大的荧光猝灭传感器和有机太阳能电池中用于产生电荷的关键步骤之一。受神经细胞轴突中髓鞘鞘间隙的启发,我们合成了一系列绝缘的金刚烷环烷无规无规共聚物,双硫[3.3]对环环烷(PCP)的百分比从5%增至30%,以增强受主的绝缘聚合物荧光猝灭分子。随着二硫杂[3.3]对环环烷单体的百分比增加,共聚物在光谱的红色区域显示出吸收的增加,并且共聚物的光致发光量子产率降低。30%共聚物的Stern-Volmer淬灭常数约为。比金刚烷环烷均聚物高4.5倍。与对照聚合物的比较表明,PCP中的通空偶联相互作用可能是除PCP减少的空间位阻之外增强共聚物中荧光猝灭的合理原因。研发的共聚物在不显着牺牲光致电荷转移的情况下结合了聚合