Photoresponse Behavior of a New Photochromic Liquid Crystalline Dendrimer of the Zero Generation

Abstract

Abstract: The photoresponsive behavior of a new photochromic liquid crystalline(LC) dendrimer of the zero generation(G0) in CHCl₃ and THF was described. Four 4-hexyloxyazobenzene mesogenic fragments were attached in its periphery. The intensity of light absorbed, molar extinction coefficient, maximum absorption wave length, quantum yield and activation energy were determined. The reaction rate constants of trans/cis of photochemical isomerization, photo back-isomerization and thermal back-isomerization and the equilibrium constant of photochemical back-isomerization reaction were discussed. The rate constant of the photochromic reaction of G0 is 10^-1 s^-1 , but that of photochromic LC polysiloxanes containing the azobenzene moieties is 10^-8 s^-1 , thus the photoresponsive rate of the LC dendrimer G0 is 107 times larger than that of the latter.

Key words: Photoisomerization, Photo back-isomerization, Thermal back-isomerization, Quantum yield, Intensity of light absorption

CLC Number:

O631

TrendMD:

ZHANG Qi-Zhen, LIU Jian-Qiang, TANG Xin-De, ZHANG Jing-Zhi. Photoresponse Behavior of a New Photochromic Liquid Crystalline Dendrimer of the Zero Generation[J]. Chem. J. Chinese Universities, 2005, 26(4): 778.

[1]	LIU Suyu, DING Fei, LI Qian, FAN Chunhai, FENG Jing. Azobenzene-integrated DNA Nanomachine [J]. Chem. J. Chinese Universities, 2022, 43(8): 20220122.
[2]	ZHENG Yunlong, ZHAO Minglei, LI Liping, LI Guangshe, ZHANG Xitian. Preparation, Phase Structure Control and Luminescent Properties of Bi_1-_xEu_xPO₄ Nanophosphors^† [J]. Chem. J. Chinese Universities, 2014, 35(5): 921.
[3]	CHAI Jinhua, WANG Yue, XU Deqing, WANG Xue, ZHU Changan, GUO Yang, ZHANG Chenglu. Synthesis of Bioactive Aryl Imidazole Derivatives and Their Applications for the pH-Induced Luminescence Sensing Probe^† [J]. Chem. J. Chinese Universities, 2014, 35(4): 750.
[4]	WANG Li, WANG Jin, CHEN Yan, ZHONG Hong-Hai, JIANG Yang*. One\\|pot Synthesis of CdS Quantum Dots and Their Quantum Yields [J]. Chem. J. Chinese Universities, 2011, 32(5): 1043.
[5]	Lü Bing-Feng, LI Guo-Ping*, LUO Yun-Jun. Gold Nanoparticles Prepared by Aqueous Synthesis and Its Fluorescence Properties [J]. Chem. J. Chinese Universities, 2010, 31(8): 1502.
[6]	MA Xiao-Bo, NIE Wei, WANG Ce, ZHANG Wan-Jin*, JI Xiang-Ling. Preparation of CdSe/CdS/SiO₂ Nanospheres and Their Luminescent Properties [J]. Chem. J. Chinese Universities, 2010, 31(5): 874.
[7]	WANG Yan-Xia, CHEN Yi-Shan, YE Song . Theoretical Study of the Photoisomerization of 2-Methylthiophene to 3-Methylthiophene [J]. Chem. J. Chinese Universities, 2005, 26(4): 747.
[8]	LI Liang, QIAN Hui-Feng, REN Ji-Cun. A New Type Fluorescent Cu Ions Probe——CdTe Quantum Dots [J]. Chem. J. Chinese Universities, 2004, 25(S1): 70.
[9]	LIAN Hui-Qin, WU Xue. Synthesis and Photochromism Property of Three Naphthacenequinone Phenolic Resins [J]. Chem. J. Chinese Universities, 2004, 25(9): 1740.
[10]	ZHANG Qi-Zhen, LIU Jian-Qiang, YIN Xiao-Ying, ZHANG Jing-Zhi. Photoresponse Behaviour of a New Photochromic Liquid Crystalline Carbosilane Dendrimer of the First Generation Containing Hexyloxyazobenzene Moieties Groups in Its Periphery [J]. Chem. J. Chinese Universities, 2004, 25(7): 1368.
[11]	SUN Xiu-Yun, FENG Ji-Kang, REN Ai-Min, SU Zhong-Min, FU Wei, JIN Hong-Wei. Theoretical Study of the Structures, Spectra, Nonlinear Second-order Optical Properties and Photoisomerization Process of the Spiroconjugated Compound 1',3',3'-Trimethyl-6- hydroxyspiro[2H-1-benzopyran-2,2'-indoline] [J]. Chem. J. Chinese Universities, 2000, 21(7): 1080.
[12]	PENG Zhao-Kuai, YANG Guo-Qiang, WU Shi-Kang . A Study of the Spectra and Photophysical Behavior of 2-Aryl-benzoxazole [J]. Chem. J. Chinese Universities, 1996, 17(9): 1424.
[13]	ZHAO Wei-li, DU Zu-liang, ZHU Zi-qiang, MING Yang-fu, FAN Mei-gong. Photochromic Properties of Pyrryl Fulgides [J]. Chem. J. Chinese Universities, 1995, 16(S1): 186.
[14]	WANG Peng-Fei, WU Shi-Kang. A Study of the Nonradiative Decay Process of N,N-Dimethylamino Enone Derivatives with Different Limited Structures [J]. Chem. J. Chinese Universities, 1995, 16(5): 756.
[15]	Huan Zhenwei, Tang Jiansheng, Kao Zhenheng . Studies on 1,4-Bis(Phenyl Ethynyl)Benzene and Its Bis Substituted Phenyl Derivatives [J]. Chem. J. Chinese Universities, 1990, 11(6): 586.

Photoresponse Behavior of a New Photochromic Liquid Crystalline Dendrimer of the Zero Generation

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments