Phenantropteridine and 12-carboxydibenzo[a,c]phenazine were synthesized and used as photoinitiators for radical polymerization of 2-ethyl-2-hydroxymethy1-1,3-propandiol and pentaerythritol triacrylates in the visible light. In the studied systems, a photoinitiating polymerization dye acting as an electron acceptor or hydrogen acceptor, and a coinitiator of radical polymerization acting as an electron donor or H donor were also used. Deviations from the typical shape of the photoinitiated polymerization curves ("humps") were obsd.