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Tunable Surface Area, Porosity, and Function in Conjugated Microporous Polymers
Author(s) -
Chen Jie,
Yan Wei,
Townsend Esther J.,
Feng Jiangtao,
Pan Long,
Del Angel Hernandez Veronica,
Faul Charl F. J.
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201905488
Subject(s) - microporous material , conjugated microporous polymer , polymer , mesoporous material , bet theory , materials science , chemical engineering , specific surface area , porosity , conjugated system , ionic bonding , solubility , polymer chemistry , adsorption , chemistry , ion , organic chemistry , catalysis , composite material , engineering
Abstract Simple inorganic salts are used to tune N‐containing conjugated microporous polymers (CMPs) synthesized by Buchwald–Hartwig (BH) cross‐coupling reactions. Poly(triphenylamine), PTPA, initially shows a broad distribution of micropores, mesopores, and macropores. However, the addition of inorganic salts affects all porous network properties significantly: the pore size distribution is narrowed to the microporous range only, mimicking COFs and MOFs; the BET surface area is radically improved from 58 m 2 g −1 to 1152 m 2 g −1 ; and variations of the anion and cation sizes are used to fine‐tune the surface area of PTPA, with the surface area showing a gradual decrease with an increase in the ionic radius of salts. The effect of the salt on the physical properties of the polymer is attributed to adjusting and optimizing the Hansen solubility parameters (HSPs) of solvents for the growing polymer, and named the Beijing–Xi'an Jiaotong (BXJ) method.