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

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 GdCl 3 to produce the gadolinium complex through salt metathesis. This complex was successfully used to initiate the ring-opening po...

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Bibliographic Details
Published in:Chinese chemical letters 2008-06, Vol.19 (6), p.681-684
Main Authors: Wu, Guang Ming, Ni, Xu Feng, Sun, Wei Lin, Shen, Zhi Quan
Format: Article
Language:English
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Summary: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 GdCl 3 to produce the gadolinium complex through salt metathesis. This complex was successfully used to initiate the ring-opening polymerization of ɛ-caprolactone. The initiation conditions in different temperature, monomer-to-initiator ratio and time were investigated. Under the condition: [ɛ-caprolactone]:[catalyst] = 600, 56 °C, toluene: 2 ml, poly(ɛ-caprolactone) (PCL) with Mw = 11,2782 and PDI = 1.96 was achieved.
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2008.04.021