scholarly journals Zirconium (IV) Acetylacetonate: Ring-Opening Initiator Mediating One-Step Synthesis of Biodegradable Polyacids

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Piotr Dobrzyński ◽  
Małgorzata Pastusiak ◽  
Joanna Jaworska ◽  
Bożena Kaczmarczyk ◽  
Michał Kwiecień ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Acid Derivative ◽  
Ring Opening ◽  
Active Catalyst ◽  
Ring Opening Polymerization ◽  
Cyclic Carbonate ◽  
Trimethylene Carbonate ◽  
Step Method ◽  
Polymerization Mechanism ◽  
One Step

Biodegradable polyacid is obtained in one-step ring-opening polymerization (ROP) of carboxylic-acid-functionalized six-membered cyclic carbonate mediated with zirconium (IV) acetylacetonate. Exemplary copolymers with L,L-lactide are described as well. Moreover, zirconium (IV) acetylacetonate is found to be active catalyst of trimethylene carbonate (TMC) ROP in presence of carboxylic acid yielding PTMC end-capped with the acid derivative. Polymerization mechanism is hypothesized demonstrating possibilities of the method in work-saving polycation synthesis and one-step method of conjugate synthesis of well-known biocompatible polyesters and polycarbonates.

One-step synthesis of poly(methacrylate)-b-polyester via “one organocatalyst, two polymerizations”

2021 ◽  
Author(s):  
Mengmeng Li ◽  
Lin Zhou ◽  
Ziqi Zhang ◽  
Qi Wang ◽  
Jiani Gao ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Methyl Methacrylate ◽  
Ambient Temperature ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Atom Transfer ◽  
Trimethylene Carbonate ◽  
One Step

By using triarylsulfonium hexafluorophosphate salt as an organocatalyst for both photo-controlled atom transfer radical polymerization (photo-ATRP) and ring-opening polymerization (ROP) at ambient temperature, well-defined poly(methyl methacrylate)-b-poly(trimethylene carbonate) block copolymer was...

Three is company: dual intramolecular hydrogen-bond enabled carboxylic acid active in ring-opening polymerization

2016 ◽  
Vol 7 (5) ◽  
pp. 1111-1120 ◽  
Author(s):  
Jiaxi Xu ◽  
Jingjing Liu ◽  
Zhenjiang Li ◽  
Xiaopei Li ◽  
Cheng Chen ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Carboxylic Acid ◽  
Intramolecular Hydrogen Bond ◽  
Ring Opening ◽  
Active Catalyst ◽  
Ring Opening Polymerization ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Intramolecular Hydrogen

Dual intramolecular H-bonding made weak Brønsted acid an active catalyst in cationic ring-opening polymerizations.

Biometal Derivatives as Catalysts for the Ring-Opening Polymerization of Trimethylene Carbonate. Optimization of the Ca(II) Salen Catalyst System

2006 ◽  
Vol 39 (13) ◽  
pp. 4374-4379 ◽  
Author(s):  
Donald J. Darensbourg ◽  
Wonsook Choi ◽  
Poulomi Ganguly ◽  
Casseday P. Richers
Keyword(s):  
Ring Opening ◽  
Catalyst System ◽  
Ring Opening Polymerization ◽  
Trimethylene Carbonate
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