Double organic modification by 3-chloropropyl and methyl groups on pure silica MCM-41 and Ti-MCM-41: efficient catalyst for epoxidation of cyclododecene

Simultaneous surface modification by 3-chloropropyl and methyl groups on the same Si atoms resulted in hydrophobic and highly ordered mesoporous silica with a very high surface area. C-13 and Si-29 MAS NMR spectra indicate homogeneous grafting of chloropropyl and methyl groups in the silica matrix and this organically modified Ti-MCM-41 shows outstanding catalytic performance in the epoxidation of cyclododecene using tert-butyl hydroperoxide as oxidant.