Facile synthesis of a high-performance titanosilicate catalyst with controllable defective Ti(OSi) 3 OH sites.

A novel TS-1 (TS-1(S)) catalyst with newly-generated defects, i.e. Ti(OSi)(3)OH species, which exhibits the highest reactivity among different Ti species, is constructed in an ingenious strategy. This also provides a promising way to effectively tune the intrinsic nature of Ti active centres in other titanosilicates.