4-Octyl-4 - azobenzene

Studies by Nishiyama and Fujihara [149] utilizing azobenzene derivative (27) as isomerizable chromophores have demonstrated the importance of reaction cavity free volume in L-B films. The L-B films of amphiphilic derivative 4-octyl-4 -(3-carboxytrimethyleneoxy)-azobenzene (27) upon irradiation was found to be stable, no geometric isomerization of the azobennzene moiety occurred. This compound forms L-B films with water soluble polyallylamine 28 at an air-water interface. Reversible cis-trans photoisomerization occurs in the film containing 28. The reversible photoisomerization reaction in polyion complexed films is thought to occur because of the increased area per molecule provided in the film. The cross sections of molecule 27 in the pure film and in film containing 28 were estimated to be 0.28 and 0.39 nm2. Such an increased area per molecule... 

Lin, Z. F., Loo, B. H., Baba, R., and Fujishima, A. Excellent Reversible Photochromic Behaviour of 4-Octyl-4 (5-carboxylpentamethylene)-azobenzene in Organized Monolayer Assemblies. Chem. Lett. 1023 (1990). 

Liu Z, Loo B H, Baba R and Fujishima A 1990 Excellent reversible photochromic behaviour of 4-octyl-4 -(5-carboxyl-pentamethyleneoxy)-azobenzene in organized monolayer assemblies Chem. Lett. 1023-6... 

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