10225-93-1Relevant academic research and scientific papers
Spectroscopic and thermal isomerization characteristics of 3,3'-dialkoxy and dialkanoyloxy azobenzenes
Ruslim,Ichimura
, p. 2704 - 2707 (2000)
The UV/visible spectra and activation parameters of thermal Z-to-E isomerization of several symmetrical 3,3'-dialkoxy and dialkanoyloxy azobenzenes were discussed in comparison to those of the corresponding 4,4'-disubstituted, unsubstituted and other subs
Aryliminodimagnesium Reagents. XV. Condensation with Nitrobenzene. Formation of Unsymmetrical Azobenzenes Favored By Long-Chain p-Alkoxy-Substituted Reagents
Okubo, Masao,Matsuo, Koji,Yamauchi, Akira
, p. 915 - 918 (1989)
In the reaction of p-MeC6H4N(MgBr)2 with p-alkoxynitrobenzene, no effect of alkoxy chain length on the relative yields of azoxy and azo products was observed.In contrast, in the reaction of p-alkoxy-C6H4N(MgBr)2 with p-nitrotoluene, C12- and C18-alkoxyl chains led to the corresponding unsymmetrical azobenzenes in unexpectedly high yields.This result, arising from efficient condensation and deoxygenation processes, was explained in terms of cooperation of reagent molecules through their aggregation assisted by a novel tying effect of their long chains.
A straightforward protocol for the highly efficient preparation of main-chain azo polymers directly from bisnitroaromatic compounds by the photocatalytic process
Wang, Laibing,Pan, Xiangqiang,Zhao, Yin,Chen, Yang,Zhang, Wei,Tu, Yingfeng,Zhang, Zhengbiao,Zhu, Jian,Zhou, Nianchen,Zhu, Xiulin
, p. 1289 - 1295 (2015)
A novel strategy for the synthesis of main-chain Azo polymers directly from bisnitroaromatic compounds by the photocatalytic process has been achieved under mild conditions. This approach avoids the tedious synthesis of Azo monomers and proceeds with a hi
Z-isomers of 3,3'-disubstituted azobenzenes highly compatible with liquid crystals
Ruslim, Christian,Ichimura, Kunihiro
, p. 673 - 681 (2007/10/03)
It is known that mesophase changes can be induced by E-Z photoisomerization of azobenzenes doped in liquid crystals. Novel azobenzenes have been designed on the basis of Molecular Mechanics and Molecular Orbital calculation, aimed at exploiting novel photoresponsive guest-host liquid crystalline systems exhibiting no mesophase change despite the drastic structural alteration of the guest molecules. It was found that the introduction of alkanoyloxy groups at both the 3- and 3'-positions of azobenzene leads to phase stability of nematic systems upon the E-Z photoisomerization even at a dopant concentration as high as 20 wt%. However phase separation was brought about when 3,3'-dialkoxyazobenzenes and 4,4'- dialkoxyazobenzenes were employed as guest molecules. The relation between the conformational structures of the guests in their E- and Z-isomers and their compatibility with nematic hosts was examined thermodynamically. Experimental results were compared in some details with the simulations. It was shown that 3,3'-dialkanoyloxyazobenzene prefers a rod-like structure in both E- and Z-isomers.
Mesogenic cyclopentadienyl cyclopalladated azobenzene complexes
Ghedini, Mauro,Pucci, Daniela,Neve, Francesco
, p. 137 - 138 (2007/10/03)
The novel coordinatively saturated cyclopentadienyl palladium complexes [PdLn(η5-C5H5)] (HLn = thermotropic 4-R,4′-R′-azobenzene; n = 1, R = R′ = C6H13; n = 2, R = R′ = C6/
