studied in solution. Dual emission from the locally excited (LE, the lowest-energy singlet excited state of 1Lb nature localized on the carbazole donor) and the highly polarized, intramolecular charge-transfer states of (pre)-twisted type (TICT states) is observed in non-polar and polar solvents. Ultrafast transient spectroscopy reveals that the excitation into the 1Lb LE state is followed by rapid (∼ps)
在溶液中研究了一系列N-
咔唑基
苯甲酸酯推挽生色团中的逐步光诱导电荷转移。观察到了来自局部激发的双发射(LE,
咔唑供体上固有的最低能量的1 L b性质的单重态激发态)和(预)扭曲类型的高极化分子内电荷转移态(TICT态)在非极性和极性溶剂中。超快速瞬态光谱显示,激发到1 L b LE状态后,电荷快速分离(〜ps),进入发射性TICT状态。激发到1 L的
咔唑(S 2)上的第二个单重态激发态一个性质的结果在两个子100fs的人口1大号b和TICT状态。