Photophysical properties of octupolar chromophore based on triazine core and fluorene divinylene conjugated bridge |
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| Authors: | Li Weia Jie Ping Shia Zhi Qiang Zhoub Yi Ping Cuib Hong Wen Hua Guo Yuan Lua a |
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| Institution: | Department of Chemistry, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China ; Advanced Photonics Center, Southeast University, Nanjing 210096, China |
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| Abstract: | A novel octupolar chromophore with 1,3,5-triazine as core,2,7-divinylene-9,9-dimethylfluorene as extendedπ-conjugated bridge,triarylamine as the electron-donating end-groups was successfully synthesized and characterized.Their linear photophysical and two-photon absorption(TPA) properties were investigated by UV absorption,excited fluorescence(SPEF) spectra and nonlinear transmission method,respectively.The absorption cut-off of the chromophore is below 520 nm and it has stronger fluorescence emission in a nonpolar solvent.In addition,the chromophore exhibits larger TPA cross-section(226.0 GM) in the femtosecond regime at 800 nm. |
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| Keywords: | Octupolar molecules Synthesis Horner-Wadsworth-Emmons reaction Photophysical properties TPA cross-section |
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