Electrooptic proprieties of layer-by-layer films of a azobenzene containing copolymer

• Main Author: Ribeiro, Paulo A.
• Publication Date: 2005
• Other Authors: Gomes, Paulo J., Ferreira, Quirina, Raposo, Maria, Dos Santos, David S., Balogh, Débora T., Oliveira Jr., Osvaldo N., Giacometti, J. A. [UNESP]
• Format: Conference object
• Language: eng
• Source: Repositório Institucional da UNESP
• Download full: http://dx.doi.org/10.1109/ISE.2005.1612443; http://hdl.handle.net/11449/68537
• topic: Acrylic monomers; Azobenzene; Cationic polymerization; Chromophores; Copolymerization; Electrooptical effects; Anionic polyelectrolytes; Electrooptic proprieties; Layer by layer films (LbL); Methacrylic copolymer; Polymer films

The methacrylic copolymer functionalized with the azo chromophore 4-[N-ethyl-N-(2-hydroxiethyl)]-amino-2′-chloro-4-nitroazobenzene (MMADR13), in its polyelectrolyte form, can be used to fabricate thin films by the layer-by-layer (LbL) technique just if one alternates this anionic polyelectrolyte with a cationic polyelectrolyte such as poly(allylamine hydrochloride) (PAH). Since PAH does not present any particular optical functionality, the main final film feature will came from the side chain DR13 azo-chromophore group due to its large nonlinear optical properties and photoisomerization capabilities. This work reports the electrooptic activity of MMADR13/DR13 LBL films, which arises from the high hiperpolarizability about the azo side chain group.