The synthesis of new membrane materials was carried out by photopolymerisation of formulation that contain the active tetrapyrazolic tripods monomers spread on a polyacrylonitrile support. The obtained membrane films were applied for their facilitated transport and extraction power towards Cd(II), Pb(Il), and Hg(II). We have determined both the diffusion flux F of different cations and the selectivity S of the prepared membranes towards each cations. (C) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 111: 57-62, 2009