1450636-32-4Relevant articles and documents
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
Tian, Guojian,Xiang, Ning,Zhou, Haitao,Li, Yiru,Li, Bo,Wang, Qiaochun,Su, Jianhua
, p. 298 - 303 (2015/12/30)
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.
New thermally stable cyano-substituted D-A-π-A-D molecules with aggregation-induced emission and large two-photo absorption cross-sections
Huang, Wei,Zhou, Haitao,Li, Bo,Su, Jianhua
, p. 3038 - 3045 (2013/04/24)
In this work, we have designed and synthesized a series of aggregation-induced emission active compounds (4a-c) via Suzuki coupling reaction. Their one and two-photon absorption properties have been investigated. These compounds exhibit high thermal stability, losing only 5% of their weights when heated to 482-503 °C in air. All compounds are quite weakly fluorescent in THF, while a significant AIE effect is observed in water/THF (v/v 70%/30%) mixtures with a sharp increase in fluorescence intensity (about 86, 42, and 103 times, orange, deep yellow and green, respectively). The solid fluorescence of 4a-c is located at 590, 579 and 547 nm, and their ΦF values are determined to be 9.2%, 2.4%, and 14.5%, respectively. Besides, the two-photon absorption (2PA) cross-sections of 4a-c were also measured by open aperture Z-scan technique, at the wavelength of 800 nm. The excellent aggregation-induced emission and 2PA cross-sections properties of 4a-c promote them as attractive candidates for biophotonic materials.
