| 周边含己氧基的三代光致变色液晶树枝状大分子的光化学 |
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| 引用本文： | 张其震,殷晓颖,李爱香. 周边含己氧基的三代光致变色液晶树枝状大分子的光化学[J]. 化学学报, 2006, 64(16): 1743-1748 |
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| 作者姓名： | 张其震 殷晓颖 李爱香 |
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| 作者单位： | 山东大学化学化工学院,济南,250100;山东大学化学化工学院,济南,250100;山东大学化学化工学院,济南,250100 |
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| 基金项目： | 国家自然科学基金(Nos.29874020,59575029)，山东省自然科学基金，中国科学院高分子物理重点实验室资助项目. |
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| 摘 要： | 报道了新化合物含108个己氧基端基的三代(G3)碳硅烷光致变色液晶树状大分子在溶液中的反-顺光异构化反应速率常数kp, 光回复异构化正/逆反应速率常数kt和kc, 热回复异构化反应速率常数kH, 光回复异构化反应平衡常数kt/kc, 活化能E, 异构转化率A/A0及组分比A'/A0. G3的光致变色反应速率常数的数量级为10－1 s－1, 而侧链含偶氮基元的光致变色聚硅氧烷的光致变色反应速率常数的数量级为10－8 s－1, 因此G3的光响应速率比后者快107倍.
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| 关 键 词： | 光致变色液晶树枝状大分子 光异构化 光回复异构化 热回复异构化 活化能 光电信息存贮材料 |
| 收稿时间： | 2005-10-24 |
| 修稿时间： | 2005-10-242005-12-27 |
Photochemistry of Photochromic Liquid Crystalline Dendrimer of the Third Generation Containing Hexyloxy Groups on Its Periphery |
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| ZHANG,Qi-Zhen,YIN,Xiao-Ying,LI,Ai-Xiang. Photochemistry of Photochromic Liquid Crystalline Dendrimer of the Third Generation Containing Hexyloxy Groups on Its Periphery[J]. Acta Chimica Sinica, 2006, 64(16): 1743-1748 |
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| Authors: | ZHANG Qi-Zhen YIN Xiao-Ying LI Ai-Xiang |
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| Affiliation: | (School of Chemistry and Chemical Engineering, Jinan 250100) |
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| Abstract: | The activation energy E, trans/cis isomer absorbance ratio A/A0, trans/cis photo isomerization reaction rate constant kp, photo back-isomerization positive/counter reaction rate constant kt and kc, thermal back-isomerization rate constant kH at different temperatures, photo back-isomerization reaction equilibrium value kt/kc and trans/cis isomer absorbance ratio at thermal back-isomerization reaction A'/A0 of a new car- bosilane photochromic liquid crystalline (LC) dendrimer of the third generation (G3) containing 108 4-hexyloxyazobenzene moieties on its periphery in solvent were described. The photochromic rate constants of G3 is 10-1 s-1, but that of photochromic polysiloxane containing the azobenzene moieties in side-chain is 10-8 s-1, thus the photoresponsive rate of G3 is 107 times larger than that of the latter. |
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| Keywords: | photochromic liquid crystalline dendrimer photoisomerization photo back-isomerization thermal back-isomerization activation energy photoelectrical informational storage material |
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