| Synthesis and Nonlinear Optical Properties of a New A-π-A Two-Photon Compound Utilizing Dibenzothiophene as Center |
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| 基金项目： | Project supported by the State Key Program of China （No. 2004CB719803）, the National Natural Science Foundation of China （Nos. 50673053, NSFC/RGC50218001, 50173015, 60377041）. |
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| 摘 要： |
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| 关 键 词： | 化学合成 光子 荧光 非线性光学 |
| 收稿时间： | 2007-02-22 |
| 修稿时间： | 2007-05-10 |
Synthesis and Nonlinear Optical Properties of a New A‐π‐A Two‐Photon Compound Utilizing Dibenzothiophene as Center |
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| Authors: | Xian ZHANG Xiao‐Qiang YU Jin‐Shui YAO Min‐Hua JIANG |
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| Institution: | 1. School of Materials Science and Engineering, Shandong Institute of Light Industry, Jinan, Shandong 250353, China;2. State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, China |
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| Abstract: | A new two‐photon material, 3E,6E‐bis(2‐pyrid‐4′‐ylvinyl)dibenzothiophene (BPVDBT), has been firstly synthesized by an efficient Pd‐catalyzed Heck coupling route. The single‐ and two‐photon fluorescence, quantum yields, lifetimes, solvent effects of the chromophore were studied in detail and the compound exhibited solvent‐sensitivity. The fluorescence intensity (Iout) and input excitation intensity (Iin) can fit in well with the quadratic parabolas, which indicates that the up‐converted fluorescence was induced by the two‐photon absorption (TPA). TPA cross‐section of BPVDBT has been measured using the two‐photon‐induced fluorescence method, whose value is 14.24×10?50 cm4·s·photon?1·molecule?1 at 750 nm. The experimental results confirm that BPVDBT is a good two‐photon absorbing chromophore with an A‐π‐A type. |
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| Keywords: | BPVDBT synthesis single- and two-photon fluorescence TPA cross-section |
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