Porous and efficient polymeric solid acid synthesized from sulfonation of nanoporous polymer

Abstract

Efficient nanoporous amberlite (XAD-4) based solid strong acid (XAD-4–SO 3 H–SO 2 CF 3 ) has been successfully synthesized by decorating SO 2 CF 3 , a strong electron withdrawing group onto the network of nanoporous solid acid of XAD-4–SO 3 H. N 2 sorption isotherms and TG curves show that XAD-4–SO 3 H–SO 2 CF 3 has large BET surface area and good thermal stability. XPS spectra show that the group of SO 2 CF 3 has been introduced onto the network of XAD-4–SO 3 H. TEM results shows that the well-dispersion of C, S, and O elements. Catalytic property tests show that XAD-4–SO 3 H–SO 2 CF 3 exhibits excellent catalytic activities in biomass transformation toward acylation of anisole with acetyl chloride, synthesis of bisphenol-A and esterification of acetic acid with cyclohexanol when compared with those of solid strong acids of Amberlyst-15, SBA-15-0.1–SO 3 H, H 3 PW 12 O 40 and XAD-4–SO 3 H.