Evaluation of thermo-optical properties of poly(2-methoxyaniline) solutions

Thermal properties of DMSO solutions of poly(2-methoxy)aniline were obtained by TL technique. It showed higher aggregation trend when compared with polyaniline. We present results of thermal lens (TL) and photoluminescence on dimethylsulfoxide solutions of poly(2-methoxyaniline) doped with three dif...

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Bibliographic Details
Published in:Chemical physics letters 2007-07, Vol.442 (4), p.400-404
Main Authors: Andrade, A.A., Castro, M.P.P., Rocha, A.M., Vargas, H., Bastos, N.M.S., Giacomini, R.A., Miranda, P.C.M.L., Jacinto, C., Catunda, T.
Format: Article
Language:English
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Summary:Thermal properties of DMSO solutions of poly(2-methoxy)aniline were obtained by TL technique. It showed higher aggregation trend when compared with polyaniline. We present results of thermal lens (TL) and photoluminescence on dimethylsulfoxide solutions of poly(2-methoxyaniline) doped with three different inorganic acids. Both thermal diffusivity and fluorescence quantum efficiency ( η) values for all polymers are very close regardless the inorganic acid doping. TL results were in agreement with those obtained from photoluminescence studies. The η, for all the polymer solutions, decreased with increasing polymer concentration, indicating that nonradiative processes become significant in higher concentrations. Although polyaniline and poly(2-methoxyaniline) solutions show identical behavior in concentrated solutions, the observed fluorescence quenching for poly(2-methoxyaniline) in diluted samples is higher, indicating its higher aggregation at lower concentrations.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2007.06.021