Bimetallic Aluminum Complexes Supported by Bis(salicylaldimine) Ligand: Synthesis, Characterization and Ring-opening Polymerization of Lactide

Tong Shi; Quan-De Zheng; Wei-Wei Zuo; Shao-Feng Liu; Zhi-Bo Li

doi:10.1007/s10118-018-2039-5

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Bimetallic Aluminum Complexes Supported by Bis(salicylaldimine) Ligand: Synthesis, Characterization and Ring-opening Polymerization of Lactide

Articles | Updated：2021-02-18

- Bimetallic Aluminum Complexes Supported by Bis(salicylaldimine) Ligand: Synthesis, Characterization and Ring-opening Polymerization of Lactide
- Chinese Journal of Polymer Science Vol. 36, Issue 2, Pages: 149-156(2018)
- Affiliations：
  
  a.Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department; School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
  b.State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China
- Author bio：
  
  E-mail shaofengliu@qust.edu.cn (S.F.L.)
  E-mail zbli@qust.edu.cn (Z.B.L.)
- Funds：
- DOI：10.1007/s10118-018-2039-5
  CLC：
- Received：10 August 2017，
  
  Accepted：08 September 2017，
  
  Online First：01 November 2017，
  
  Published：05 February 2018
- Accepted：
Scan QR Code
Tong Shi, Quan-De Zheng, Wei-Wei Zuo, et al. Bimetallic Aluminum Complexes Supported by Bis(salicylaldimine) Ligand: Synthesis, Characterization and Ring-opening Polymerization of Lactide[J]. Chinese Journal of Polymer Science, 2018, 36(2): 149-156.
DOI：

Tong Shi, Quan-De Zheng, Wei-Wei Zuo, et al. Bimetallic Aluminum Complexes Supported by Bis(salicylaldimine) Ligand: Synthesis, Characterization and Ring-opening Polymerization of Lactide[J]. Chinese Journal of Polymer Science, 2018, 36(2): 149-156. DOI： 10.1007/s10118-018-2039-5.

摘要

Abstract

Two types of bifunctional bis(salicylaldimine) ligands (

syn

-L

and

anti

-L

) were designed and synthesized to support bimetallic aluminum complexes. Owing to the rigid anthracene skeleton

syn

-L

and

anti

-L

successfully locked two Al centers in close proximity (

syn

-Al

) and far apart (

anti

-Al

)

respectively. The distance between two Al centers in

syn

-Al

was defined by X-ray diffraction as 6.665 Å

which is far shorter than that in

anti

-Al

. In the presence of stoichiometrical BnOH

syn

-Al

and

anti

-Al

were both efficient for ring-opening polymerization (ROP) of

rac

-LA with the former being more active. In the presence of excess BnOH

syn

-Al

showed an efficient and immortal feature

consistent with high conversions

matched

narrow molecular weight distributions and end group fidelity

while

anti

-Al

had a much lower activity or even became entirely inactive due to rapid decomposition

indicated by

in situ

H-NMR experiments of Al complexes with BnOH.

关键词

Keywords

references

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