The present invention relates to conjugated oligomers and conjugated polymers comprising aromatic thiophene nucleus. The conjugate material is aryl diamine and aryl dialdehydes, or bifunctional aryl residue containing both aldehyde and an amine, obtained by a simple and efficient condensation. Condensation of the complementary residues at temperatures ranging up to reflux temperature in various solvents from room temperature leads to conjugated oligomers and conjugated polymers, which can then be cast into a thin film. Oligomerization and polymerization is the removal of the product-product water which causes moving the favorable equilibrium to the product conjugated carried out under mild conditions. Conjugated compound obtained may be rendered electrically conductive by a dopant, any electrically conductive material of p-type or n-type conductor can be obtained depending on the selected dopant.