scholarly journals Computational Prediction and Experimental Verification of ε-Caprolactone Ring-Opening Polymerization Activity by an Aluminum Complex of an Indolide/Schiff-Base Ligand

ACS Catalysis ◽  
2018 ◽  
Vol 9 (2) ◽  
pp. 885-889 ◽  
Author(s):  
Mukunda Mandal ◽  
Anna M. Luke ◽  
Büşra Dereli ◽  
Courtney E. Elwell ◽  
Theresa M. Reineke ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Experimental Verification ◽  
Ring Opening ◽  
Computational Prediction ◽  
Ring Opening Polymerization ◽  
Aluminum Complex

Bulk solvent-free melt ring-opening polymerization of L-lactide catalyzed by Cu(II) and Cu(II)-Nd(III) complexes of the Salen-type Schiff-base ligand

2011 ◽  
Vol 25 (4) ◽  
pp. 310-316 ◽  
Author(s):  
Lei-Lei Chen ◽  
Li-Qin Ding ◽  
Chu Zeng ◽  
Yong Long ◽  
Xing-Qiang Lü ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Solvent Free

scholarly journals High activity of an indium alkoxide complex toward ring opening polymerization of cyclic esters

2015 ◽  
Vol 51 (47) ◽  
pp. 9643-9646 ◽  
Author(s):  
Stephanie M. Quan ◽  
Paula L. Diaconescu
Keyword(s):  
Schiff Base ◽  
High Activity ◽  
Schiff Base Ligand ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Trimethylene Carbonate ◽  
Cyclic Esters ◽  
Indium Complex

An indium complex supported by a ferrocene-derived Schiff base ligand has unprecedented activity toward ε-caprolactone, δ-valerolactone, and β-butyrolactone ring-opening polymerizations. l-Lactide, d,l-lactide, and trimethylene carbonate polymerizations also showed moderate to high activity.

Different mechanisms at different temperatures for the ring-opening polymerization of lactide catalyzed by binuclear magnesium and zinc alkoxides

2015 ◽  
Vol 44 (37) ◽  
pp. 16383-16391 ◽  
Author(s):  
Yangyang Sun ◽  
Yaqin Cui ◽  
Jiao Xiong ◽  
Zhongran Dai ◽  
Ning Tang ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Different Temperatures

Two binuclear magnesium and zinc alkoxides supported by a bis-salalen type dinucleating heptadentate Schiff base ligand can catalyze the ring-opening polymerization of lactide via different mechanisms at different temperatures.

Bulk ring-opening polymerization (ROP) of L-lactide catalyzed by Ni(ii) and Ni(ii)-Sm(iii) complexes based on a salen-type schiff-base ligand

2011 ◽  
Vol 2 (3) ◽  
pp. 659-664 ◽  
Author(s):  
Guoqi Xiao ◽  
Bing Yan ◽  
Rui Ma ◽  
Wen Juan Jin ◽  
Xing Qiang Lü ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Ring Opening ◽  
Ring Opening Polymerization

scholarly journals Turning on ROP activity in a bimetallic Co/Zn complex supported by a [2+2] Schiff-base macrocycle

2019 ◽  
Vol 55 (75) ◽  
pp. 11279-11282 ◽  
Author(s):  
Kuiyuan Wang ◽  
Timothy J. Prior ◽  
Carl Redshaw
Keyword(s):  
Schiff Base ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Bimetallic Complexes

Homo-dinuclear Co or Zn complexes derived from a [2+2] Schiff-base macrocycle revealed near inactivity for the ring opening polymerization of δ-valerolactone and ε-caprolactone, whereas hetero-bimetallic complexes were efficient catalysts.

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.

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