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The influence of organic solvents (dimethylformamide, tetrahydrofuran, chloroform, nitrobenzene and toluene) on the spectral characteristics of solutions in doped and non-alloyed forms of poly-ortho-toluidine (PoTi) was studied. The absorption spectra of poly-ortho-toluidine, measured in solvents of different polarity, reveal a change not only the position, but also the intensity and shape of the absorption band, depending on the polarity of the solvent. It was noticed, that different forms of PoTi cause the difference in the coloration of their solutions. Based on the study of optical spectra, temperature dependence of conductivity and the structure of PoTi, it has been founded that this conjugated polymer can be a perspective basis for sensory environments for the molecular recognition of organic solvents.

Solvatochromic effect in solutions of poly-ortho-toluidine