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Sirianni QEA, Liang X, Such GK, Gillies ER. Polyglyoxylamides with a pH-Mediated Solubility and Depolymerization Switch. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01796] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Quinton E. A. Sirianni
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7
- The Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario, Canada N6A 5B7
| | - Xiaoli Liang
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7
- The Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario, Canada N6A 5B7
| | - Georgina K. Such
- The School of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Elizabeth R. Gillies
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7
- The Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario, Canada N6A 5B7
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Ontario, Canada N6A 5B9
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Maschmeyer PG, Liang X, Hung A, Ahmadzai O, Kenny AL, Luong YC, Forder TN, Zeng H, Gillies ER, Roberts DA. Post-polymerization ‘click’ end-capping of polyglyoxylate self-immolative polymers. Polym Chem 2021. [DOI: 10.1039/d1py01169c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Post-polymerization CuAAC reactions are used to ‘click’ stimuli-cleavable triazole end-caps onto self-immolative poly(ethyl glyoxylate).
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Affiliation(s)
- Peter G. Maschmeyer
- Key Centre for Polymers and Colloids, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Xiaoli Liang
- Department of Chemistry and the Centre for Advanced Materials and Biomaterials Research. The University of Western Ontario, 1151 Richmond St., London, Canada N6A 5B7
| | - Allison Hung
- Department of Chemistry and the Centre for Advanced Materials and Biomaterials Research. The University of Western Ontario, 1151 Richmond St., London, Canada N6A 5B7
| | - Oksana Ahmadzai
- Key Centre for Polymers and Colloids, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Annmaree L. Kenny
- Key Centre for Polymers and Colloids, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Yuan C. Luong
- Key Centre for Polymers and Colloids, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Timothy N. Forder
- Key Centre for Polymers and Colloids, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Haoxiang Zeng
- Key Centre for Polymers and Colloids, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Elizabeth R. Gillies
- Department of Chemistry and the Centre for Advanced Materials and Biomaterials Research. The University of Western Ontario, 1151 Richmond St., London, Canada N6A 5B7
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond St., London, Ontario, Canada N6A 5B9
| | - Derrick A. Roberts
- Key Centre for Polymers and Colloids, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
- Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia
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Kim H, Brooks AD, DiLauro AM, Phillips ST. Poly(carboxypyrrole)s That Depolymerize from Head to Tail in the Solid State in Response to Specific Applied Signals. J Am Chem Soc 2020; 142:9447-9452. [PMID: 32330033 DOI: 10.1021/jacs.0c02774] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This Article describes the design, synthesis, and analysis of a new class of polymer that is capable of depolymerizing continuously, completely, and cleanly from head to tail when a detection unit on the head of the polymer is exposed to a specific applied signal. The backbone of this polymer consists of 1,3-disubstituted pyrroles and carboxy linkages similar to polyurethanes. Diverse side chains or reactive end-groups can be introduced readily, which provides modular design of polymer structure. The designed depolymerization mechanism proceeds through spontaneous release of carbon dioxide and azafulvene in response to a single triggering reaction with the detection unit. These poly(carboxypyrrole)s depolymerize readily in nonpolar environments, and even in the bulk as solid-state plastics.
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Affiliation(s)
- Hyungwoo Kim
- School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
| | - Adam D Brooks
- Micron School of Materials Science and Engineering, Boise State University, 1910 University Drive, Boise, Idaho 83725-2090, United States
| | - Anthony M DiLauro
- Micron School of Materials Science and Engineering, Boise State University, 1910 University Drive, Boise, Idaho 83725-2090, United States
| | - Scott T Phillips
- Micron School of Materials Science and Engineering, Boise State University, 1910 University Drive, Boise, Idaho 83725-2090, United States
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Heuchan SM, Fan B, Kowalski JJ, Gillies ER, Henry HAL. Development of Fertilizer Coatings from Polyglyoxylate-Polyester Blends Responsive to Root-Driven pH Change. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:12720-12729. [PMID: 31652059 DOI: 10.1021/acs.jafc.9b04717] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Many current controlled-release fertilizers (CRFs) are coated with nonbiodegradable polymers that can contribute to microplastic pollution. Here, coatings of self-immolative poly(ethyl glyoxylate) (PEtG) capped with a carbamate and blended with polycaprolactone (PCL) or poly(l-lactic acid) (PLA) were evaluated. They were designed to depolymerize and release fertilizers in the vicinity of plant roots, where the pH is lower than that in the surrounding environment. PEtG/PCL coatings exhibited significant temperature and pH effects, requiring 18 days at pH 5 and 30 °C, compared to 77 days at pH 7 and 22 °C, to reach 15% mass loss. Plant roots were also effective in triggering coating degradation. Spray-coating and melt-coating were explored, with the latter being more effective in providing pellets that retained urea prior to polymer degradation. Finally, PEtG/PCL-coated pellets promoted plant growth to a similar degree or better than currently available CRFs.
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Joo W, Wang W, Mesch R, Matsuzawa K, Liu D, Willson CG. Synthesis of Unzipping Polyester and a Study of its Photochemistry. J Am Chem Soc 2019; 141:14736-14741. [PMID: 31460760 DOI: 10.1021/jacs.9b06285] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Preparation of an unzipping polyester is reported. The monomer was prepared from benzoic acid in a four-step sequence. Step growth polymerization of the monomer provides the target polymer. Efficient depolymerization upon irradiation at 254 nm was confirmed with a quantum yield of >0.8. The photolysis mechanism was investigated, and the results of radical trapping experiments are consistent with an initial Norrish type I like homolysis followed by a radical mediated depropagation reaction driven by aromatization.
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Affiliation(s)
- Wontae Joo
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Wade Wang
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Ryan Mesch
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Kensuke Matsuzawa
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Di Liu
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - C Grant Willson
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States.,Department of Chemical Engineering , University of Texas at Austin , Austin , Texas 78712 , United States
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Yardley RE, Kenaree AR, Gillies ER. Triggering Depolymerization: Progress and Opportunities for Self-Immolative Polymers. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00965] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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