Efficient two-photon sensitized luminescence of europium (Ⅲ) complex based on hypersensitive transitions |
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作者姓名: | 史萌 李华 潘梅 苏富芳 马丽丽 韩培高 汪河洲 |
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作者单位: | Shandong Provincial Key Laboratory of Laser Polarization and Information Technology,Laser Institute,Qufu Normal University;Xingtan College,Qufu Normal University;School of Chemistry and Chemical Engineering,Sun Yat-Sen University;School of Physics and Engineenng,Sun Yat-Sen University,State Key Laboratory of Optoelectronic Materials and Technologies |
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基金项目: | supported by the National Natural Science Foundation of China (No. 20903120);the Project of shandong Provincial Higher Educational Science and Technology Program (No. J10LA10);the Doctoral Research Foundation of Qufu Normal University |
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摘 要: | Red frequency-upconversion fluorescence emission is observed in europium(Ⅲ) complex with encapsulating polybenzimidazole tripodal ligands, pumped with 930- and 1070-nm picosecond laser pulses. The lumines- cence of transition 5D0 →7F2 (612 nm) is induced by two-photon absorption of hypersensitive transitions 7F0 →5D2 (465 nm) and 7F1 →5D1 (535 nm). Analysis results suggest that the two-photon excitation strength of these hypersensitive transitions is increased dramatically owing to the C3 symmetry of the coordination field.
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关 键 词: | 双光子吸收 敏化发光 过敏 上转换荧光 皮秒激光脉冲 铕 三角架配体 聚苯并咪唑 |
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