Pure silicon and Ti-substituted mesoporous molecular sieves(HMS and MCM-41) have been synthesized by surfactant templpating pathway.A type of Ti(O iPr) 4+DET chiral complex has been successfully assembled to mesoporous carriers by use of exchange reaction of the surface hydroxyls of mesoporous carriers with Ti compound or d-diethyl tartrate(DET).Though four assembled pathways,chiral Ti anchored mesoporous catalysts have been first prepared.These anchored chiral catalysts are characterized by FT-IR.Its Ti contents are measured.In catalyzing the epoxidation of styrene with tertbutyl hydroperoxide(TBHP) as an oxidant,these chiral catalysts have the better catalytic activity and the selectivity for the epoxides.The adjusting interaction of DET ligand to the Ti sites anchored on the mesoporous carriers will cause the decrease in the catalytic activity and the increase in the epoxidation selectivity of the Ti sites.The chiral inducting interaction of DET will induce to produce the enantiomeric excess of d-epoxide(ee.% is up to 32.4%)

Hexagonal mesoporous silica(HMS) has been synthesized successfully.With the rich surface OH groups,we have finished the assembled method for anchoring vanadium complexe over HMS firsly,then bonding the linger DET with vanadium complex.The bonding interactions between vanadium complex and the surface OH groups are studied by FT-IR characterization technology.Results indicate that those assembled catalysts are more active than the free V complex for the epoxidation of styrene with terbutyl hydroperoxide(TBHP).Exchanged time,activated temperature,reaction conditions and DET ligand have significant influences on the oxidative activity and the selectivity to the epoxides of assembled catalysts.