The formation of two organic interpenetrated networks on halogen bonding driven self-assembly of diiodoperfluorarenes with tetrapyridyl tectons is described Both architectures exhibit two-dimensional square 4(4) networks with either a 2 fold interpenetration of class IIa or a 3-fold interpenetration of class la Diiodoperfluoroarenes are proven robust tectons in the design of interpenetrated networks based on the expansion strategy (C) 2010 Elsevier B V All rights reserved