“…Furthermore, according to the IUPAC recommendation, we define microporous polymers as polymeric materials with pore size smaller than 2 nm in diameter, mesoporous polymers with pore size in the range of 2–50 nm, and macroporous polymers with pore size larger than 50 nm. Such a definition is necessary because sometimes polymers with pores in the micrometer scale are also called microporous polymers. − There are several important structural characteristics of porous polymers that should be described, including pore geometry, pore size, pore surface functionality, and polymeric framework structure including composition, topology, and functionality − (Figure ). Pore geometry includes spherical, tubular, and network-type morphologies that can be either disordered or assembled into ordered arrays.…”