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Diaz C, Fu J, Soobrattee S, Cao L, Nyamayaro K, Goonesinghe C, Patrick BO, Mehrkhodavandi P. Comparison of Imine- and Phosphinimine-Supported Indium Complexes: Tuning the Reactivity for the Sequential and Simultaneous Copolymerization of Lactide and ε-Caprolactone. Inorg Chem 2022; 61:3763-3773. [PMID: 35171588 DOI: 10.1021/acs.inorgchem.2c00043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Imine- and phosphinimine-supported indium complexes were used as catalysts in the polymerization of racemic lactide and ε-caprolactone as well as their copolymerization by the sequential and simultaneous addition of monomers. Tuning the electronics and sterics of the indium centers by either (i) changing the nature of the nitrogen donors and (ii) coordinating a hemilabile side group had a significant effect on the reactivity of the complexes, their stability, and their control in the synthesis of block copolymers. Specifically, the imine-supported complex (5) showed the highest activity in the homo- and copolymerization of the cyclic esters, in contrast to the phosphinimine-supported complex (7), which was significantly slower and less stable. The presence of morpholine and thiomorpholine hemilabile side groups either reduced the activity or prevented the formation of alkoxide complexes.
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Affiliation(s)
- Carlos Diaz
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Jane Fu
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Shazia Soobrattee
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Lirong Cao
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Kudzanai Nyamayaro
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Chatura Goonesinghe
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Brian O Patrick
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Parisa Mehrkhodavandi
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
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Alberti C, Enthaler S. Depolymerization of End‐of‐Life Poly(lactide) to Lactide via Zinc‐Catalysis. ChemistrySelect 2020. [DOI: 10.1002/slct.202003979] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Christoph Alberti
- Universität Hamburg Institut für Anorganische und Angewandte Chemie Martin-Luther-King-Platz 6 D-20146 Hamburg Germany
| | - Stephan Enthaler
- Universität Hamburg Institut für Anorganische und Angewandte Chemie Martin-Luther-King-Platz 6 D-20146 Hamburg Germany
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Diaz C, Tomković T, Goonesinghe C, Hatzikiriakos SG, Mehrkhodavandi P. One-Pot Synthesis of Oxygenated Block Copolymers by Polymerization of Epoxides and Lactide Using Cationic Indium Complexes. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01276] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Carlos Diaz
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Tanja Tomković
- Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Chatura Goonesinghe
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Savvas G. Hatzikiriakos
- Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Parisa Mehrkhodavandi
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
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