Stabilization of quercetin flavonoid in MCM-41 mesoporous silica: positive effect of surface functionalization

► A kneading method to complex quercetin with plain or octyl-functionalized MCM-41. ► Hydrogen bonding interactions with Si-OH groups are strengthened by octyl chains. ► Quercetin release profiles were estimated by diffusion through a semi-permeable membrane. ► Photostability and antioxidant activities were improved by complexation.