Evidence for Two-Photon Absorption-Induced ESIPT of Chromophores Containing Hydroxyl and Imino Groups
作者:Fang Gao、Xiaojuan Ye、Hongru Li、Xiaolin Zhong、Qi Wang
DOI:10.1002/cphc.201100885
日期:2012.4.10
under one‐ and two‐photon excitation. Furthermore, the first emission maxima of C1 and C3 are almost identical to the maximum fluorescence emission wavelengths of C2 and C4, respectively. These results show that C1 and C3 can undergo ESIPT via a reasonable six‐membered ring, while there is no ESIPT in C2 and C4 under one‐ and two‐photon excitation. Compounds C1 and C2 have larger two‐photon absorption
本文介绍了在单光子和双光子激发下具有羟基和亚氨基的新型生色团的激发态分子内质子转移(ESIPT)的实验和理论研究。结果表明,内部氢键对2-[((4'- N,N-二乙基氨基二苯基乙烯-4-ylimino)甲基]苯酚(C1)和2 [[(4'-甲氧基)二苯基乙烯-4-亚氨基]甲基]苯酚(C3)。在单光子和双光子激发下,化合物C1和C3表现出分离良好的双荧光发射带。C1和C3的第二个荧光峰其特点是斯托克斯位移比第一个正常峰值大得多(约140 vs. 30 nm)。4 [[(4'- N,N-二乙基氨基二苯基乙烯-4-ylimino)甲基]苯酚(C2)和4 [[(4'-甲氧基二苯基乙烯-4-ylimino)甲基]苯酚(C4)显示斯托克斯小的单个发射带在一个和两个光子激发下,各种溶剂的位移(约30 nm)。此外,C1和C3的第一发射最大值分别与C2和C4的最大荧光发射波长几乎相同。这些结果表明C1和C3