Ligand - Thermosensitive copolymer and ionic liquid preparation and use

The present invention discloses a ligand - Thermosensitive copolymer and ionic liquid preparation and use. Specifically, the copolymer of the present invention has a structure as shown in formula I, wherein x: y = 1: 5 ~ 7; MPEG fragment represents polyethylene glycol monomethyl ether. The copolymer is prepared by a process comprising the following steps: 1. Synthesis of the ligand monomer); Synthesis ionic liquid monomer 2); 3) ligand - Synthesis of Thermosensitive ionic liquid copolymer. The copolymer may be constructed in a temperature controlled phase separation system and the ATRP reaction, the catalyst was recovered as a ligand, not only to achieve a number of recycling and recovery of the catalyst, and reduces the loss of the ligand, also overcomes the conventional method can not be applied to contain defects poorly water-soluble or water-sensitive matrix system, the great development and application prospects.