Citation: Guang Ming Wu, Xu Feng Ni, Wei Lin Sun, Zhi Quan Shen. Tetrahydrosalen backboned gadolinium complex as initiator for the ring-opening polymerization of ε-caprolactone[J]. Chinese Chemical Letters, ;2008, 19(6): 681-684. doi: 10.1016/j.cclet.2008.04.021 shu

Tetrahydrosalen backboned gadolinium complex as initiator for the ring-opening polymerization of ε-caprolactone

Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 31002Z China

Received Date: 9 January 2008

Tetrahydrosalen ligand was employed in the synthesis of gadolinium complex. The ligand was deprotoned by LiBu, and the afforded lithium salt was reacted with anhydrous GdCl₃ to produce the gadolinium complex through salt metathesis. This complex was successfully used to initiate the ring-opening polymerization of ε-caprolactone. The initiation conditions in different temperature, monomer-to-initiator ratio and time were investigated. Under the condition:[ε-caprolactone]:[catalyst]=600,56℃, toluene:2ml, poly(ε-caprolactone) (PCL) with Mw=11,2782 and PDI=1.96 was achieved.
- Tetrahydrosalen complex,
- Rare earth catalyst,
- ε-Caprolactone,
- Ring-opening polymerization
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