| 新型双发色团染料荧光光谱及其寿命的研究 |
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| 引用本文： | 田禾,苏建华,陈孔常,张镇平,郭孟鑫. 新型双发色团染料荧光光谱及其寿命的研究[J]. 影像科学与光化学, 1996, 14(4): 355-359. DOI: 10.7517/j.issn.1674-0475.1996.04.355 |
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| 作者姓名： | 田禾 苏建华 陈孔常 张镇平 郭孟鑫 |
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| 作者单位： | 1. 华东理工大学精细化工研究所, 上海200237;2. 台湾辅仁大学理工学院化学系, 台北242 |
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| 摘 要： | 有效的染料激光操作需要较高的荧光量子效率,若丹明是在500~700 nm光谱区中一类最重要的激光染料.然而,染料的基态分子和三线态对辐射能量的吸收将会大大降低激光输出效率,再者,由于若丹明类染料在紫外区的吸收系数较小,为了有效吸收泵浦能量(如用XeCI准分子激光,308 nm),就必须使用高浓度染料溶液,在这种情况下,若丹明类染料较小的Stokes位移就势必造成基态分子更大的重复吸收,即造成更大的谐振腔损耗[1].
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| 关 键 词： | 荧光寿命 能量传递 多发色团染料 |
| 收稿时间： | 1996-03-18 |
THE FLUORESCENCE SPECTRA AND LIFETIME OF NOVEL BICHROMOPHORIC DYES |
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| TIAN He,SU Jianhua,CHEN Kongchang,ZHANG Zhenpin,GUO Mengxin. THE FLUORESCENCE SPECTRA AND LIFETIME OF NOVEL BICHROMOPHORIC DYES[J]. Imaging Science and Photochemistry, 1996, 14(4): 355-359. DOI: 10.7517/j.issn.1674-0475.1996.04.355 |
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| Authors: | TIAN He SU Jianhua CHEN Kongchang ZHANG Zhenpin GUO Mengxin |
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| Affiliation: | 1. Institute of Fine Chmeicals, East China University of Science and Technology, Shanghai 200237;2. College of Science and Engineering, Fu Jen University, 24 Taipei |
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| Abstract: | Novel bichromophoric rhodamine dyes,in which carbazole chromophore was connected with rhodamine 6G or rhodamine DR-21 by -CH2CH2-,have been synthesized.The absorption and fluorescence spectra of these bichromophoric dyes have been measured. The absorption of the bichromophoric dyes is the sum of that of two chromophores alone.A lot of fluorescence emission of carbazole in the bichromophoric dyes was quenched. The fluorescence lifetimes of the dyes have been measured by single-photon counting technique. The fluorescence lifetime of carbazole is shortened obviously in the bichromophoric dyes(from 15.4 ns reduced to about 7.8ns). The intramolecular energy transfer and charge transfer between two chromophores have been discussed. |
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| Keywords: | fluorescence lifetime energy transfer multi-chromophoric dyes |
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