| 酸碱度和胺类对噻嗪类染料光致变色的影响 |
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| 引用本文： | 梁兆熙,林廷东,李曼孚.酸碱度和胺类对噻嗪类染料光致变色的影响[J].中山大学学报(自然科学版),1988(2). |
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| 作者姓名： | 梁兆熙 林廷东 李曼孚 |
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| 作者单位： | 中山大学高分子研究所，中山大学高分子研究所，中山大学高分子研究所 |
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| 摘 要： | 本文研究了酸碱度和不同胺类给电子体对噻嗪类染料在固态基质中光退色反应的影响.发现当染料激发三线态的质子化形式含量与给电子体有效还原形式的含量最优配合时可获得最佳的光氧化还原效果.对胺类给电子体,如其氮原子周围有供电子基或能与染料缔合的化合物参加光反应时则还原效果较好.
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| 关 键 词： | 噻嗪 胺类给电子体 光还原 光致变色 |
The Effect of Acidity and Amines on the Photochromic Character of Thiazine Dyes |
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| Liang Zhaoxi Lin Tingdong Li Manfu.The Effect of Acidity and Amines on the Photochromic Character of Thiazine Dyes[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,1988(2). |
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| Authors: | Liang Zhaoxi Lin Tingdong Li Manfu |
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| Institution: | Liang Zhaoxi Lin Tingdong Li Manfu |
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| Abstract: | Photochromic activity of thiazine dye/amine systems was investigated under visible light irradiation with adjusting acidity in PVA matrix and in aqueous solution. The influence of acidity on the photochromic rate is significant, the optimum pH values for thionine/EDTA and thionine/triethanolamine in PVA matrix are 6.4 and 8.4 respectively. The best effect was found when the higher contents of protonated species of triplet dye match with the higher contents of effective reductive species of donor. On the other hand, the influence of different amine donors on the photochromic rates and the fluorescence emission spectra were studied and found that amine donors with donating group attacted to nitrogen atoms or those being able to associate with dye can increase the photochromic activity. |
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| Keywords: | thiazine amine donor photoreduction photochromic |
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