Abstract
Thermal analysis of three azomonoether dyes, exhibiting liquid-crystalline properties, was performed in dynamic air atmosphere. Thermal stability studies and the evaluation of the kinetic parameters of each physical or chemical transformations are essential for a full characterization, before attempting accurate thin films’ depositions of such materials used in non-linear optical applications. New synthesized dyes with general formula:
where R is a nematogenic group: CN, CF3 or a highly polarizable group: NO2 were investigated using TG, DTG, DTA and DSC techniques, under non-isothermal regime. The evolved gases were analyzed by FTIR spectroscopy. The activation energies of the first decomposition step were evaluated for each compound, the obtained results revealing complex mechanisms.
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Rotaru, A., Kropidłowska, A., Moanţă, A. et al. Thermal decomposition kinetics of some aromatic azomonoethers. J Therm Anal Calorim 92, 233–238 (2008). https://doi.org/10.1007/s10973-007-8815-z
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DOI: https://doi.org/10.1007/s10973-007-8815-z