Multidimensional self-assembled crystalline nanostructures were synthesized from ionic porphyrin tectons. Porphyrins are an important class of organic semiconductors that structurally and functionally resemble naturally occurring photosynthetic and enzymatic chromophores and thus are extensively being studied as building blocks for molecular optoelectronics. 1D (rods) and 3D (hyperbranched sheave-like) porphyrin nanocrystals were examined by scanning probe microscopy, TEM, and diffraction methods. A model for predicting the crystal size distribution of 1D system was developed based on mass balance and included terms for nucleation, growth, and Ostwald (OR) ripening. The formation of 3D sheaf-like structures is the result of crystal splitting followed by the long term growth of individual nanoribbons. Integration constants and activation energies for the 1D and 3D porphyrin systems were obtained. A photoconductivity study of the 1D nanorods and a model for electron transport through the nanostructures will be presented. The mechanical properties of these ionic porphyrin assemblies are comparable to those of covalently bonded polymeric systems making them excellent candidates for flexible optoelectronic devices.