High Catalytic Activity of Manganese–Porphyrin Cage Confining a Metal Nanocluster in Styrene Epoxidation

Abstract Mn–porphyrin cages confining ca. 1.4–1.5 nm Pd and Au clusters (1a and 2a) showed high catalytic turnover numbers rather than simple monomeric porphyrin complex (3a) in styrene epoxidation by iodosobenzene. Absorption spectroscopic studies indicated that the accumulation of inactive species is efficiently suppressed when the cage catalysts 1a and 2a were employed.