| 多钼酸盐–柠檬酸复合膜的多色光致变色 |
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| 引用本文： | 王静,张光晋,杨文胜,姚建年.多钼酸盐–柠檬酸复合膜的多色光致变色[J].中国化学,2005,23(8):1037-1041. |
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| 作者姓名： | 王静 张光晋 杨文胜 姚建年 |
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| 作者单位： | [1]Key Laboratory of Photochemistry, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China [2]Present Address： College of Chemistry, Jilin University, Changchun 130023, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （Nos. 50221201, 90301010, 20373077 and 20471062）, the Chinese Academy of Sciences and the National Research Fund for Fundamental Key Projects No. 973. |
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| 摘 要： | 制备了多钼酸盐–柠檬酸光致变色复合膜，紫外光照后发现不同摩尔比的复合膜呈现不同的颜色。当摩尔比为1.0，0.3和0.2时，变色后的薄膜分别显深蓝色，深黄褐色和淡海绿色。通过对薄膜的拉曼光谱分析证实呈现不同的颜色是由于在变色后的膜中生成了不同的物种。柠檬酸在光致变色过程中起着重要的作用, 在紫外光的照射下它作为空穴的捕获剂, 抑制了光生电子和空穴的复合, 使多钼酸盐呈现紫外光致变色现象。
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| 关 键 词： | 多钼酸盐 柠檬酸 复合膜 光致变色 |
| 收稿时间： | October 25,2004 |
| 修稿时间： | October 25,2004 |
Multicolor Photochromism of Polymolybdate-Citric Acid Composite Films |
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| Wang Jing;Zhang GuangJin;Yang WenSheng;Yao JianNian.Multicolor Photochromism of Polymolybdate-Citric Acid Composite Films[J].Chinese Journal of Chemistry,2005,23(8):1037-1041. |
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| Authors: | Wang Jing;Zhang GuangJin;Yang WenSheng;Yao JianNian |
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| Abstract: | Photochromic polymolybdate-citric acid composite films were fabricated. It was found that after UV irradiation the composite films with different molar ratios of organic/inorganic components exhibited different colors. The UV-irradiated films showed dark blue, dark khaki and light sea green colors when the ratios were 1.0, 0.3 and 0.2, respectively. It was identified by Raman spectra that the polymolybdate species formed in the composite films after UV irradiation were sensitive to the ratios of the organic/inorganic components, thus resulting in the different colors of irradiated films. Citric acid played an important role during the photochromic process. Under UV light irradiation, it served as hole scavenger that suppresses the recombination of photogenerated electrons and holes to make the polymolybdates show UV light photochromism. |
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| Keywords: | polymolybdate composite photochromism |
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