Ring-Opening Polymerization of rac-β-Butyrolactone Promoted by New Tetradentate Thioether-Amide Ligand-Type Zinc Complexes
Abstract
:1. Introduction
2. Results and Discussion
2.1. Synthesis and Characterization
2.2. Polymerization Studies
2.3. Mechanism of β-BL Polymerization by Zinc Complexes
3. Conclusions
4. Experimental Section
4.1. Synthesis of (NSSN-iPr)Zn (1)
4.2. Synthesis of (NSSN-Cy)Zn (2)
4.3. Synthesis of (NSSN-Mes)Zn (3)
4.4. Typical Procedure for Cyclic Ester Polymerization
4.5. Computational Details
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Complex | Zn Charge (a) | %VBur (b) | Zn-N (c) | S-Zn-N (d) |
---|---|---|---|---|
1 | 1.39 | 74.3 | 1.94 | 86.1 |
2 | 1.39 | 78.4 | 1.93 | 86.0 |
3 | 1.23 | 83.2 | 1.93 | 85.2 |
Entry (a) | Catalyst | Time (min) | Conv. (b) (%) | TOF (c) (h−1) | Mn(th) (d) | Mn(expt) (e) | PDI (e) |
---|---|---|---|---|---|---|---|
1 | 1 | 30 | 84 | 168 | 7.2 | 7.2 | 1.17 |
2 | 2 | 30 | 77 | 154 | 6.6 | 6.0 | 1.13 |
3 | 3 | 30 | 64 | 128 | 5.5 | 5.2 | 1.21 |
4 | 1 | 60 | 97 | 97 | 8.3 | 8.2 | 1.22 |
5 | 2 | 60 | 90 | 90 | 7.7 | 7.5 | 1.23 |
6 | 3 | 60 | 90 | 90 | 7.7 | 7.3 | 1.91 |
Entry (a) | Monomer | [mon]/[1] | Time (min) | Conv. (c) (%) | TOF (d) (h−1) | Mn(th) (e) | Mn(expt) (f) | PDI (f) |
---|---|---|---|---|---|---|---|---|
LLA | 100 | 30 | 90 | 180 | 13.0 | 11.9 | 1.19 | |
7 (b) | LLA | 250 | 120 | 95 | 406 | 34.2 | 30.3 | 1.25 |
8 | εCL | 100 | 5 | 99 | 1200 | 11.3 | 9.8 | 1.15 |
9 | εCL | 300 | 10 | 99 | 1930 | 33.8 | 31.1 | 1.28 |
10 | εCL | 600 | 15 | 99 | 2600 | 67.7 | 62.5 | 1.32 |
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Impemba, S.; Manca, G.; Tozio, I.; Milione, S. Ring-Opening Polymerization of rac-β-Butyrolactone Promoted by New Tetradentate Thioether-Amide Ligand-Type Zinc Complexes. Polymers 2023, 15, 4366. https://doi.org/10.3390/polym15224366
Impemba S, Manca G, Tozio I, Milione S. Ring-Opening Polymerization of rac-β-Butyrolactone Promoted by New Tetradentate Thioether-Amide Ligand-Type Zinc Complexes. Polymers. 2023; 15(22):4366. https://doi.org/10.3390/polym15224366
Chicago/Turabian StyleImpemba, Salvatore, Gabriele Manca, Irene Tozio, and Stefano Milione. 2023. "Ring-Opening Polymerization of rac-β-Butyrolactone Promoted by New Tetradentate Thioether-Amide Ligand-Type Zinc Complexes" Polymers 15, no. 22: 4366. https://doi.org/10.3390/polym15224366
APA StyleImpemba, S., Manca, G., Tozio, I., & Milione, S. (2023). Ring-Opening Polymerization of rac-β-Butyrolactone Promoted by New Tetradentate Thioether-Amide Ligand-Type Zinc Complexes. Polymers, 15(22), 4366. https://doi.org/10.3390/polym15224366