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 [CH 3 (OCH 2 CH 2 ) 22 N + Et 3 ][PF 6 − ] (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.