New luminescent materials-poly(ketail)s i.e., polymers containing ketimine groups in their main chain, have been synthesized  from 1-4-phenylenediamine and four different diketones via polycondensation with the goal to study interactions between polymer chain, primary dopant, and secondary dopant  by ¹H  NMR measurements.  To protect full interaction  between ketimine nitrogen  atoms  and primary dopant 1,2-(di-2-ethylhexyl)ester of 4-sulfophthalic acid (DEH) or 10-camphorsulfonic acid (CSA) the mole ratio of the polymer unit and the dopant was always 1:2 . The secondary dopant-m-cresol (MC) amount to primary was equimolar.

A primary dopant for a conjugated polymers is a substance, a relatively small quantity of which figuratively changes the spectroscopic and structural properties of the polyketanils. Phenomenologically, a secondary dopant (m-cresol) is an apparently  not inert  substance, which when applied to a primary doped polyketanils, induce still further changes in the nuclear magnetic resonanse. But it should be mentioned that there is also possibility of interaction between oxygen of sulfonic groups of DEH  (or CSA) being ionically bonded to polyketanil chains and MC hydroxyl groups. Well-defined supramolecular structures  can be formed. Protonation is one of the important noncovalent interactions playing a fundamental role in polymer properties as well as in the design of new polymer architectures.