Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4766312 | Dyes and Pigments | 2017 | 8 Pages |
Abstract
Three star-shaped D-Ï-A compounds with a 1,3,5-triazine core and N-aryl chromophore (3,6-di-tert-butylcarbazole, phenoxazine and phenothiazine) substituted fluorene arms were designed and synthesized. Their photophysical properties were investigated systematically via spectroscopic and theoretical methods. All compounds exhibit strong 1Ï-Ï* transitions in the UV region and intense 1Ï-Ï*/intramolecular charge transfer (1ICT) absorption bands in the UV-vis region. Bathochromic shifts of the 1ICT bands were caused by the electron-donating N-aryl chromophores. All compounds exhibit aggregation induced emission properties in a solvent, and relatively high quantum efficiency in solid-states (Φ = 10%-20%). Moreover, these compounds show two-photon absorption (TPA) properties due to their good planarity and large Ï-conjugation. The largest TPA cross section value reaches up to 5000 GM at 800 nm. The multifunctional properties make these compounds potential candidates for application in organic light-emitting materials and two-photon bioimaging.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Rui Liu, Mingliang Shu, Jinyang Hu, Senqiang Zhu, Hong Shi, Hongjun Zhu,