scholarly journals Cooperative Hydrogen-Bond Pairing in Organocatalytic Ring-Opening Polymerization

2014 ◽  
Vol 47 (21) ◽  
pp. 7463-7468 ◽  
Author(s):  
Oleg I. Kazakov ◽  
Partha P. Datta ◽  
Meghedi Isajani ◽  
Elizabeth T. Kiesewetter ◽  
Matthew K. Kiesewetter
Keyword(s):  
Hydrogen Bond ◽  
Ring Opening ◽  
Ring Opening Polymerization

Ionic hydrogen bond donor organocatalyst for fast living ring-opening polymerization

2016 ◽  
Vol 7 (2) ◽  
pp. 339-349 ◽  
Author(s):  
Xu Zhi ◽  
Jingjing Liu ◽  
Zhenjiang Li ◽  
Huiying Wang ◽  
Xin Wang ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Ring Opening ◽  
Positive Charge ◽  
Ring Opening Polymerization ◽  
Hydrogen Bond Donor

A positive charge enhanced H-bond donor combined with H-bond acceptor as a bifunctional organocatalyst enables fast living ring-opening polymerization of lactide.

Tripodal hydrogen bond donor binding with sulfonic acid enables ring-opening polymerization

2016 ◽  
Vol 7 (7) ◽  
pp. 1368-1374 ◽  
Author(s):  
Xiaopei Li ◽  
Qiguo Zhang ◽  
Zhenjiang Li ◽  
Songquan Xu ◽  
Chengxu Zhao ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Ring Opening ◽  
Sulfonic Acid ◽  
Ring Opening Polymerization ◽  
Cyclic Ester ◽  
Cyclic Carbonates ◽  
Hydrogen Bond Donor ◽  
Acidic Catalysis

The first Brønsted acidic catalysis platform workable in all of the three major types of cyclic ester monomers including lactides, cyclic carbonates, and lactones, is described in this paper.

A squaramide and tertiary amine: an excellent hydrogen-bonding pair organocatalyst for living polymerization

2015 ◽  
Vol 6 (20) ◽  
pp. 3754-3757 ◽  
Author(s):  
Jingjing Liu ◽  
Cheng Chen ◽  
Zhenjiang Li ◽  
Wenzhuo Wu ◽  
Xu Zhi ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Ambient Temperature ◽  
Tertiary Amine ◽  
Ring Opening ◽  
Living Polymerization ◽  
Ring Opening Polymerization

A hydrogen-bond motif based on a squaramide and sparteine efficiently promoted the ring-opening polymerization of l-lactide at ambient temperature.

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.

A Recommender System for Inverse Design of Polycarbonates and Polyesters

2020 ◽  
Author(s):  
Nathaniel Park ◽  
Dmitry Yu. Zubarev ◽  
James L. Hedrick ◽  
Vivien Kiyek ◽  
Christiaan Corbet ◽  
...  
Keyword(s):  
Ring Opening ◽  
High Performance ◽  
Recommendation System ◽  
Polymeric Materials ◽  
Monomer Conversion ◽  
Design Strategy ◽  
Ring Opening Polymerization ◽  
Inverse Design ◽  
False Negatives ◽  
Accelerate Development

The convergence of artificial intelligence and machine learning with material science holds significant promise to rapidly accelerate development timelines of new high-performance polymeric materials. Within this context, we report an inverse design strategy for polycarbonate and polyester discovery based on a recommendation system that proposes polymerization experiments that are likely to produce materials with targeted properties. Following recommendations of the system driven by the historical ring-opening polymerization results, we carried out experiments targeting specific ranges of monomer conversion and dispersity of the polymers obtained from cyclic lactones and carbonates. The results of the experiments were in close agreement with the recommendation targets with few false negatives or positives obtained for each class.<br>

Bisurea and Bisthiourea H-Bonding Organocatalysts for Ring-Opening Polymerization: Cues for the Catalyst Design

2019 ◽  
Vol 52 (23) ◽  
pp. 9232-9237 ◽  
Author(s):  
Rukshika S. Hewawasam ◽  
U. L. D. Inush Kalana ◽  
Nayanthara U. Dharmaratne ◽  
Thomas J. Wright ◽  
Timothy J. Bannin ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Catalyst Design
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