Magnesium complexes bearing N,N-bidentate phenanthrene derivatives for the stereoselective ring-opening polymerization of rac-lactides

RSC Advances ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. 440-447 ◽  
Author(s):  
Bo Gao ◽  
Dehai Zhao ◽  
Xiang Li ◽  
Yuan Cui ◽  
Ranlong Duan ◽  
...  
Keyword(s):  
Schiff Bases ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Magnesium Complexes ◽  
Lactide Polymerization

Magnesium complexes based on N,N-bidentate phenanthrene derivatives derived from Schiff bases were synthesized and investigated as catalysts for rac-lactide polymerization.

scholarly journals Magnesium amino-bis(phenolato) complexes for the ring-opening polymerization of rac-lactide

2015 ◽  
Vol 44 (27) ◽  
pp. 12365-12375 ◽  
Author(s):  
Katalin Devaine-Pressing ◽  
Joshua H. Lehr ◽  
Michelle E. Pratt ◽  
Louise N. Dawe ◽  
Amy A. Sarjeant ◽  
...  
Keyword(s):  
Ring Opening ◽  
Elevated Temperatures ◽  
Group Analysis ◽  
Ring Opening Polymerization ◽  
Maldi Tof ◽  
Magnesium Complexes ◽  
End Group ◽  
Lactide Polymerization

Magnesium complexes capable of rac-lactide polymerization in both the melt and in solution at elevated temperatures were synthesized. End-group analysis by MALDI-TOF showed both linear and cyclic PLA.

Stereoselective ring-opening polymerization of rac-lactides catalyzed by titanium complexes containing N,N-bidentate phenanthrene derivatives

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 13437-13442 ◽  
Author(s):  
Bo Gao ◽  
Qian Duan ◽  
Yanhui Li ◽  
Dongni Li ◽  
Liqiu Zhang ◽  
...  
Keyword(s):  
Schiff Bases ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Titanium Complexes ◽  
Lactide Polymerization

Titanium complexes bearing N,N-bidentate diamido derived from Schiff bases were investigated as catalysts for lactide polymerization.

Ring-Opening Polymerization of Lactide Using Aluminum Salen-Type Initiators

2014 ◽  
Vol 915-916 ◽  
pp. 713-716
Author(s):  
Qing Zhang ◽  
Jing Tian ◽  
Zhi Qi Cao ◽  
Ru Xia Xu ◽  
Zhen Zhen Sun ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Infrared Spectroscopy ◽  
Reaction Time ◽  
Magnetic Resonance ◽  
Schiff Bases ◽  
Reaction Temperature ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Resonance Spectroscopy ◽  
Aluminum Complex

In this investigation, Schiff bases aluminum complex was synthesized and used as the initiator in the polymerization of D,L-lactide. The aluminum complex was characterized by infrared spectroscopy (IR), and nuclear magnetic resonance spectroscopy (NMR). The influences of different factors, including reaction time, reaction temperature, and the ratio of D, L-lactide/Al3+ on the synthesis of polylactide were described. The results showed that Schiff bases aluminum complex could be successfully applied in the ring opening polymerization. The optimum condition of the ring opening polymerization of D,L-lactide, which included D,L-lactide/Al3+ (mol/mol) ratio of 250, reaction temperature of 120 °C, and reaction time of 16 hours.

Synthesis of biodegradable and biorenewable polylactides initiated by aluminum complexes bearing m-xylylenediamine derivatives via the ring-opening polymerization of lactides

2019 ◽  
Vol 43 (18) ◽  
pp. 6943-6950 ◽  
Author(s):  
Dongni Li ◽  
Bo Gao ◽  
Qian Duan
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Aluminum Complexes ◽  
Lactide Polymerization

Aluminum complexes derived from m-xylylenediamine were synthesized and investigated as initiators for l-lactide and rac-lactide polymerization.

The effect of steric changes on the isoselectivity of dinuclear indium catalysts for lactide polymerization

2015 ◽  
Vol 44 (13) ◽  
pp. 6126-6139 ◽  
Author(s):  
K. M. Osten ◽  
D. C. Aluthge ◽  
P. Mehrkhodavandi
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Lactide Polymerization

Functionalized diaminophenolates as ligands for dinuclear indium catalysts were investigated in the ring-opening polymerization of lactide. An increase in the steric bulk of the ligand phenolates decreases the selectivity of the catalysts due to catalyst dissociation during polymerization.

Bimetallic and trimetallic zinc amino-bis(phenolate) complexes for ring-opening polymerization of rac-lactide

2019 ◽  
Vol 48 (36) ◽  
pp. 13699-13710 ◽  
Author(s):  
Yi Liu ◽  
Louise N. Dawe ◽  
Christopher M. Kozak
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Zinc Complexes ◽  
Lactide Polymerization

Di- and trinuclear zinc complexes of an amino-bis(phenolate) ligand show good lactide polymerization activity in both solution and melt.

Diastereoselective synthesis of chiral aminophenolate magnesium complexes and their application in the stereoselective polymerization of rac-lactide and rac-β-butyrolactone

2016 ◽  
Vol 45 (27) ◽  
pp. 10942-10953 ◽  
Author(s):  
Haobing Wang ◽  
Jianshuang Guo ◽  
Yang Yang ◽  
Haiyan Ma
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Diastereoselective Synthesis ◽  
Magnesium Complexes

A series of magnesium silylamido complexes supported by chiral aminophenolate ligands were synthesized, and their catalytic behaviors toward the ring-opening polymerization of rac-lactide (LA) and rac-β-butyrolactone (BBL) were explored.

scholarly journals Overcoming aggregation in indium salen catalysts for isoselective lactide polymerization

2015 ◽  
Vol 6 (9) ◽  
pp. 5284-5292 ◽  
Author(s):  
D. C. Aluthge ◽  
J. M. Ahn ◽  
P. Mehrkhodavandi
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Highly Active ◽  
Lactide Polymerization

A methodology for controlling aggregation in highly active and isoselective indium catalysts for the ring opening polymerization of racemic lactide is reported.

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