Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1257646 | Chinese Chemical Letters | 2011 | 4 Pages |
Abstract
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 nm 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.
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Authors
Li Liu, Zhi Qiang Zhou, Jie Ping Shi, Chang Gui Lu, Yi Ping Cui, Guo Yuan Lu,