Perylene-Derived Triplet Acceptors with Optimized Excited State Energy Levels for Triplet–Triplet Annihilation Assisted Upconversion
作者:Xiaoneng Cui、Azzam Charaf-Eddin、Junsi Wang、Boris Le Guennic、Jianzhang Zhao、Denis Jacquemin
DOI:10.1021/jo402718e
日期:2014.3.7
are prepared as tripletenergy acceptors for triplet–triplet annihilation (TTA) assisted upconversion. The aim is to optimize the energy levels of the T1 and S1 states of the triplet acceptors, so that the prerequisite for TTA (2ET1 > ES1) can be better satisfied, and eventually to increase the upconversion efficiency. Tuning of the energy levels of the excited states of the triplet acceptors is realized
制备了一系列of衍生物作为三重态-三重态an灭(TTA)辅助上转换的三重态能量受体。目的是优化三重态受体的T 1和S 1态的能级,以便可以更好地满足TTA的先决条件(2 E T1 > E S1),并最终提高上转换效率。三重态受体激发态能级的调节是通过将芳基连接到per上(通过单个或三个碳-碳键),或通过组装a-BODIPY二元组实现的,其中组分呈现互补S 1。和T 1状态能级。S与per相比,per衍生物的1态能级通常降低。相对于the标记,新型三重态受体的反斯托克斯位移,TTA和上转换效率得到了改善。对于the-BODIPY二元组,荧光发射在极性溶剂中基本被淬灭。此外,我们发现BODIPY能量供体的π共轭的扩展显着降低了S 1状态的能级。低的S 1状态能级和高的T 1状态能级对于三重态光敏剂是有利的。