Two polyoxometalate-based hybrids, [M(btap)(HO)(HPWO)]·HO (M-PW, M = Co/Mn, btap = 3,5-bis(1',2',4'-triazol-1'-yl)pyridine) were synthesized. Co-PW exhibited higher activity and selectivity towards olefin epoxidation than Mn-PW due to the synergistic effect between Co and PW, in which the Co centers activate O to ˙O and further binding of free H from PW affords the active peroxyacid.
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