Citation: Li Liu, Zhi Qiang Zhou, Jie Ping Shi, Chang Gui Lu, Yi Ping Cui, Guo Yuan Lu. Synthesis and properties of tribranched chromophores with triazine and fluorene units[J]. Chinese Chemical Letters, ;2011, 22(10): 1147-1150. doi: 10.1016/j.cclet.2011.05.045 shu

Synthesis and properties of tribranched chromophores with triazine and fluorene units

a Department of Chemistry, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China;
b Advanced Photonics Center, Southeast University, Nanjing 210096, China

Received Date: 2 April 2011

Fund Project: This work was supported financially by National Natural Science Foundation of China (Nos.20774039 and 20872061) and the National Basic Research (No.2007CB925103).

Two tribranched chromophores, 1, 3, 5-triazine as electron deficient core, 9, 9-dimethylfluorene as π-conjugated bridge, diphenylamino (4a) and naphthylamino (4b) as electron-donating end-groups, were successfully prepared via Buchwald-Hartwig coupling reaction. Their linear photophysical and two-photon absorption (TPA) properties were investigated by absorption, fluorescence and nonlinear transmission method, respectively. The absorption cut-offs of the chromophores are below 550 run and both chromophores have strong fluorescence emission. The compound 4a (206.3 GM) exhibits larger TPA cross-section than 4b (57.8 GM) in the femtosecond regime at 800 nm.
- Octupolar molecules,
- Buchwald-Hartwig cross-coupling,
- Photophysical properties,
- TPA cross-section
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