Aluminum methyl, alkoxide and α-alkoxy ester complexes supported by 6,6′-dimethylbiphenyl-bridged salen ligands: synthesis, characterization and catalysis for rac-lactide polymerization

2016 ◽  
Vol 45 (15) ◽  
pp. 6682-6695 ◽  
Author(s):  
Chao Kan ◽  
Jilei Ge ◽  
Haiyan Ma
Keyword(s):  
Carbonyl Group ◽  
Dissociation Equilibrium ◽  
Aluminum Complexes ◽  
Salen Ligands ◽  
Salen Aluminum ◽  
Lactide Polymerization

A series of mono- and dinuclear salen aluminum complexes could efficiently catalyze the ROP of rac-LA, producing isotactic enriched and atactic PLA, respectively. In solution, the association/dissociation equilibrium of the carbonyl group was found in the model O-lactate complexes.

Ring-opening polymerization of lactide using chiral salen aluminum complexes as initiators: high productivity and stereoselectivity

2015 ◽  
Vol 39 (6) ◽  
pp. 4670-4675 ◽  
Author(s):  
Bo Gao ◽  
Dongni Li ◽  
Yanhui Li ◽  
Qian Duan ◽  
Ranlong Duan ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
High Productivity ◽  
Aluminum Complexes ◽  
Salen Aluminum ◽  
Lactide Polymerization

Chiral salen aluminum complexes have been synthesized and investigated as initiators for l-lactide and rac-lactide polymerization.

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.

Highly efficient metal(iii) porphyrin and salen complexes for the polymerization of rac-lactide under ambient conditions

2019 ◽  
Vol 48 (10) ◽  
pp. 3223-3230 ◽  
Author(s):  
Siriwan Praban ◽  
Parichat Piromjitpong ◽  
Vagulejan Balasanthiran ◽  
Savithra Jayaraj ◽  
Malcolm H. Chisholm ◽  
...  
Keyword(s):  
Room Temperature ◽  
Ambient Conditions ◽  
Highly Efficient ◽  
Salen Complexes ◽  
Salen Ligands ◽  
Lactide Polymerization

Metal(iii) complexes supported by porphyrin and salen ligands were highly efficient for rac-lactide polymerization at room temperature giving isotactic-enriched PLA.

Aluminum complexes with Schiff base bridged bis(indolyl) ligands: synthesis, structure, and catalytic activity for polymerization of rac-lactide

2019 ◽  
Vol 48 (40) ◽  
pp. 15290-15299 ◽  
Author(s):  
Yun Wei ◽  
Lulu Song ◽  
Ling Jiang ◽  
Zeming Huang ◽  
Shaowu Wang ◽  
...  
Keyword(s):  
Schiff Base ◽  
Catalytic Activity ◽  
Polymerization Catalysts ◽  
Aluminum Complexes ◽  
Lactide Polymerization

A series of aluminum complexes with Schiff base bridged indolyl ligands were synthesized as rac-lactide polymerization catalysts.

Comparing l-lactide and ε-caprolactone polymerization by using aluminum complexes bearing ketiminate ligands: steric, electronic, and chelating effects

RSC Advances ◽  
2015 ◽  
Vol 5 (121) ◽  
pp. 100272-100280 ◽  
Author(s):  
Yu-Hsieh Chen ◽  
Yen-Jen Chen ◽  
Hsi-Ching Tseng ◽  
Cheng-Jie Lian ◽  
Hsin-Yi Tsai ◽  
...  
Keyword(s):  
Polymerization Rate ◽  
Aluminum Complexes ◽  
Lactide Polymerization

Herein, the l-lactide polymerization rate of a series of Al complexes bearing ketimine ligands was investigated, and the polymerization characteristics between l-lactide and ε-caprolactone were compared.

Hemi-salen aluminum catalysts bearing N, N, O-tridentate type binaphthyl-Schiff-base ligands for the living ring-opening polymerisation of lactide

RSC Advances ◽  
2015 ◽  
Vol 5 (37) ◽  
pp. 29412-29419 ◽  
Author(s):  
Bo Gao ◽  
Xiang Li ◽  
Ranlong Duan ◽  
Qian Duan ◽  
Yanhui Li ◽  
...  
Keyword(s):  
Schiff Base ◽  
Ring Opening ◽  
Schiff Base Ligands ◽  
Aluminum Complexes ◽  
Salen Aluminum

Hemi-salen aluminum complexes bearing tridentate N, N, O-type binaphthyl-Schiff-base ligands were synthesized and studied as catalysts for living polymerisation of lactide.

Copolymerization of l-lactide and ε-caprolactone catalyzed by mono-and dinuclear salen aluminum complexes bearing bulky 6,6′-dimethylbipheyl-bridge: random and tapered copolymer

RSC Advances ◽  
2016 ◽  
Vol 6 (53) ◽  
pp. 47402-47409 ◽  
Author(s):  
Chao Kan ◽  
Haiyan Ma
Keyword(s):  
Aluminum Complexes ◽  
Salen Aluminum

Mono- and dinuclear salen aluminum complexes bearing a racemic 6,6′-dimethyl-biphenyl bridge could efficiently catalyze the copolymerization of l-LA and ε-CL in the melt, producing practically random and tapered copolymers, respectively.

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