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	Dendritic azo compounds as a new type amorphous molecular material with quick photoinduced surface-relief-grating formation ability
	He, Yaning ; Gu, Xinyu ; Guo, Miaocai ; Wang, Xiaogong
	2010-05-07 ; 2010-05-07
关键词	dendritic azobenzene amorphous molecular materials photoinduced surface-relief-gratings POLYMER-FILMS TRANSPORT MATERIALS OPTICAL-PROPERTIES AZOBENZENE DENDRIMERS GLASSES LIGHT PHOTOISOMERIZATION PHOTOFABRICATION SUBSTITUENTS Materials Science, Multidisciplinary Optics
中文摘要	A series of dendritic azobenzene-containing compounds have been synthesized as a new type amorphous molecular material, which can show quick surfacc-relief-grating (SRG) formation ability upon light irradiation. For the synthesis, the dendritic precursor tris(2-(ethyl(phenyl)amino)ethyl)benzene-1,3,5-tricarboxylate and tris (3,5-bis(2-(ethyl(phenyl)amino)ethoxy)benzyl)benzene-1,3,5-tri-carboxylate were prepared by esterification reactions between 1,3,5-benzenetricarbonyl chloride and N-ethyl-N-hydroxyethyl-aniline and 3,5-bis[2-(N-ethylanilino)ethoxy] benzylalcohol. The precursors were, respectively reacted with the diazonium salts of 4-nitroaniline, 4-aminobenzoic acid, and 4-aminobenzonitrile to introduce different types of donor-acceptor azo chromophores at the peripheral positions. The structure and properties of the dendritic azo compounds were characterized by the spectroscopic methods and thermal analysis. The surface-relief-grating (SRG) formation behavior of the dendritic azo compounds was studied by exposing the spin-coated thin films to an interference pattern of laser beams (532 nm) at modest intensity ( 100 mW/cm(2)). The results show that the azo compounds can form stable amorphous glasses in a broad temperature range. The glass transition temperatures (TgS) depend oil the backbone structures and the type of the peripheral azo chromophors. The type of the electron withdrawing groups in the p-positions of the terminal azoben-zene units shows a significant influence on the SRG inscription rate. For the compounds containing the same type azo chromophores, the SRG inscription rate is also affected by the backbone structure. (c) 2008 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE BV ; AMSTERDAM ; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/17449]
专题	清华大学
推荐引用方式 GB/T 7714	He, Yaning,Gu, Xinyu,Guo, Miaocai,et al. Dendritic azo compounds as a new type amorphous molecular material with quick photoinduced surface-relief-grating formation ability[J],2010, 2010.
APA	He, Yaning,Gu, Xinyu,Guo, Miaocai,&Wang, Xiaogong.(2010).Dendritic azo compounds as a new type amorphous molecular material with quick photoinduced surface-relief-grating formation ability..
MLA	He, Yaning,et al."Dendritic azo compounds as a new type amorphous molecular material with quick photoinduced surface-relief-grating formation ability".(2010).

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