A novel thermoregulated phase-separable Pt nanocatalyst for selective hydrogenation of quinoline and its derivatives

A novel thermoregulated phase-separable Pt nanocatalyst stabilized by ionic liquid [CH₃(OCH₂CH₂)₂₂N⁺Et₃][PF₆⁻] (IL_PEG1000-PF6) was prepared and first explored for the selective hydrogenation of quinoline. The conversion of quinoline and selectivity of 1,2,3,4-tetrahydroquinoline were both >99% at 130 °C under 3 MPa for 1.5 h, and the IL_PEG1000-PF6 stabilized Pt nanocatalyst can be reused four times efficiently. In addition, the IL_PEG1000-PF6 stabilized Pt nanocatalyst was also extended to the selective hydrogenation of 3-methylquinoline, 6-methylquinoline, 8-methylquinoline, and 6-chloroquinoline with >99% conversion and selectivity, respectively.