PCFM Lab, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China.
PCFM Lab, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China.
Angew Chem Int Ed Engl. 2019 Aug 26;58(35):12102-12106. doi: 10.1002/anie.201906312. Epub 2019 Jul 25.
An unconventional organic molecule (TBBU) showing obvious long-lived room temperature phosphorescence (RTP) is reported. X-ray single crystal analysis demonstrates that TBBU molecules are packed in a unique fashion with side-by-side arranged intermolecular aromatic rings, which is entirely different from the RTP molecules reported to date. Theoretical calculations verify that the extraordinary intermolecular interaction between neighboring molecules plays an important role in RTP of TBBU crystals. More importantly, the polymer film doped with TBBU inherits its distinctive RTP property, which is highly sensitive to oxygen. The color of the doped film changes and its RTP lifetime drops abruptly through a dynamic collisional quenching mechanism with increasing oxygen fraction, enabling visual and quantitative detection of oxygen. Through analyzing the grayscale of the phosphorescence images, a facile method is developed for rapid, visual, and quantitative detection of oxygen in the air.
一种显示出明显的室温磷光（RTP）的非常规有机分子（TBBU）被报道。X 射线单晶分析表明，TBBU 分子以独特的方式堆积，具有并排排列的分子间芳香环，这与迄今为止报道的 RTP 分子完全不同。理论计算验证了相邻分子之间非凡的分子间相互作用在 TBBU 晶体的 RTP 中起着重要作用。更重要的是，掺杂 TBBU 的聚合物薄膜继承了其独特的 RTP 性质，对氧气高度敏感。掺杂薄膜的颜色通过动态碰撞猝灭机制发生变化，其 RTP 寿命随着氧气分数的增加而急剧下降，从而能够对氧气进行可视化和定量检测。通过分析磷光图像的灰度，可以开发出一种快速、可视化和定量检测空气中氧气的简便方法。
