作者:Clara Schäfer、Jürgen Mony、Thomas Olsson、Karl Börjesson
DOI:10.1002/chem.202002463
日期:2020.11.11
achievable dye concentration. Here, five BODIPY derivatives containing small alkyl chains in the α‐position were synthesized and photophysically characterized. By blending two or more derivatives, the increase in entropy reduces aggregation and therefore produces films with extreme dye concentration and, at the same time almost solution like absorption properties. Such a film was placed inside an optical cavity
分子间相互作用在材料化学中起着至关重要的作用,因为它们决定着薄膜的形态。有机染料薄膜的光物理性质对局部环境高度敏感,因此已投入大量精力来设计有机薄膜的形态。增溶的侧链可以成功地在空间上分离发色团,减少有害的分子间相互作用。但是,该策略也显着降低了可达到的染料浓度。在这里,合成了五种在α位含有小烷基链的BODIPY衍生物,并对其进行了光物理表征。通过混合两种或多种衍生物,熵的增加会减少聚集,因此会产生具有极高染料浓度的薄膜,并且 同时几乎像溶液一样具有吸收特性。这样的薄膜被放置在光学腔内,并且通过达到的染料浓度和薄膜的清晰吸收特性,证明了所实现的系统达到了强激子-光子耦合机制。