Preparation of Helical Mesoporous Organic-inorganic Hybrid Silica Nanofibers with Lamellar Mesopores on the Surfaces

摘要

Helical silica and organic-inorganic hybrid silica nanofibers attracted many research groups because of their potential application for chiral catalysis and separations.Although many approaches for the preparation of helical mesoporous silica nanofibers have been developed,those for the preparation of helical organic-inorganic mesoporous hybrid silica nanofibers are rare.They can be prepared using chiral low-molecularweight amphiphiles or mixtures of a cationic surfactant and a fluorinated one.For the latter case,the reduction of surface free energy was proposed as the driving force of helix formation.