Time-dependent stereoselective Heck reaction using mesoporous Pd/TiO2 nanoparticles catalyst under sunlight

Abstract

Pd(0)-doped mesoporous TiO₂ nanoparticles (Pd/TiO₂) have been synthesized using an EISA method. The catalytic activity of Pd/TiO₂ nanoparticles (NPs) is significantly enhanced under solar light irradiation for the Heck reaction. The Heck coupling product gives a considerable amount of Z-isomer, due to photochemical isomerization of the initially formed E-isomer, providing a facility for the time-dependent selectivity of E/Z-isomers under sunlight at ambient conditions.