Three-dimensional Porous Organic Semiconductor Based on Fully sp2-Hybridized Graphitic Polymer.

Dimensionality plays an important role in the charge transport properties of organic semiconductors. Although three-dimensional semiconductors, such as Si, are common in inorganic materials, imparting electrical conductivity to covalent three-dimensional organic polymers is challenging. Now, the synthesis of a three-dimensional pi-conjugated porous organic polymer (3D p-POP) using catalyst-free Diels-Alder cycloaddition polymerization followed by acid-promoted aromatization is presented. With a surface area of 801 m(2) g(-1), full conjugation throughout the carbon backbone, and an electrical conductivity of 6(2)x10(-4) S cm(-1)upon treatment with I(2)vapor, the 3D p-POP is the first member of a new class of permanently porous 3D organic semiconductors.