Wm. Vanrhijn et al., SULFONIC-ACID FUNCTIONALIZED ORDERED MESOPOROUS MATERIALS AS CATALYSTS FOR CONDENSATION AND ESTERIFICATION REACTIONS, Chemical communications, (3), 1998, pp. 317-318
Mesoporous silicas were functionalised with sulfonic acid groups; the
resulting materials are excellent catalysts for formation of bisfuryla
lkanes and polyol esters.