A novel D-A-D-A-D type molecule based on substituted dihydroindolo [3, 2-b] carbazole with large two-photon absorption cross section and excellent aggregation-induced enhanced emission property

作者：Tian, Guojian; Xiang, Ning; Zhou, Haitao; Li, Yiru; Li, Bo; Wang, Qiaochun; Su, Jianhua^*

来源：Tetrahedron, 2016, 72(2): 298-303.

DOI：10.1016/j.tet.2015.11.047

• Dihydroindolo [3, 2-b] carbazole
• Two-photon absorption
• Aggregation-induced enhanced emission
• Quantum efficiency

Two novel D-A-D-A-D type molecules T1 and T2 based on substituted dihydroindolo [3, 2-b] carbazole with large two-photon absorption (2PA) cross section and excellent aggregation-induced enhanced emission (AIEE) property have been synthesized and characterized. Both compounds emit weakly fluorescent in THF, while a significant AIEE property is observed in water/THF (v/v 50%/50%) for T1 and water/THF (v/v 90%/10%) for T2 with a sharp increase in fluorescence intensity. The solid fluorescence of T1 and T2 is located at 575 nm and 588 nm, and their quantum efficiencies are determined to be 3.2% and 5.8%, respectively. The corresponding 2PA cross section values for T1 and T2 at 800 nm are 867 GM and 1300 GM by the open-aperture Z-scan technique. These excellent performances of both compounds make them as attractive alternatives for biophotonic and optoelectronic applications.

• 出版日期2016-1-14
• 单位华东理工大学; 华东师范大学