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Some new coloured monomers having electron-withdrawing groups were synthesized from 2-methylresorcinol, and their structures were confirmed by 1 H-NMR, IR, and combustion analyses. The effects of substituents in the diazo components on colour and NMR properties were examined. The effects of solvent polarity on the chemical shifts in NMR spectra were also determined. Explanations for the observed...
The second harmonic properties of thin films of polymeric colorants covalently linked to azo dyes were determined and the effects of poling time, poling temperature and poling electric fields on the SHG were evaluated. A poling temperature around the T g of the polymeric colorants, a poling time between 20 30 min and a poling electric field at 5 kV/cm 2 were found to be suitable...
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