Photochemistry of Photochromic Liquid Crystalline Dendrimer of the Third Generation Containing Hexyloxy Groups on Its Periphery

Acta Chimica Sinica ›› 2006, Vol. 64 ›› Issue (16): 1743-1748. Previous Articles Next Articles

Original Articles

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

张其震*, 殷晓颖, 李爱香

(山东大学化学化工学院济南 250100)

投稿日期:2005-10-24 修回日期:2005-12-27 发布日期:2006-08-28
通讯作者: 张其震

Photochemistry of Photochromic Liquid Crystalline Dendrimer of the Third Generation Containing Hexyloxy Groups on Its Periphery

ZHANG Qi-Zhen*; YIN Xiao-Ying; LI Ai-Xiang

(School of Chemistry and Chemical Engineering, Jinan 250100)

Received:2005-10-24 Revised:2005-12-27 Published:2006-08-28
Contact: ZHANG Qi-Zhen

Abstract

The activation energy E, trans/cis isomer absorbance ratio A/A₀, trans/cis photo isomerization reaction rate constant k_p, photo back-isomerization positive/counter reaction rate constant k_t and k_c, thermal back-isomerization rate constant k_H at different temperatures, photo back-isomerization reaction equilibrium value k_t/k_c and trans/cis isomer absorbance ratio at thermal back-isomerization reaction A'/A₀ of a new carbosilane photochro-mic 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^－1s^－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 10⁷times larger than that of the latter.

Key words: photochromic liquid crystalline dendrimer, photoisomerization, photo back-isomerization, thermal back-isomerization, activation energy, photoelectrical informational storage material

Cite this article

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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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

Photochemistry of Photochromic Liquid Crystalline Dendrimer of the Third Generation Containing Hexyloxy Groups on Its Periphery

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