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Verma A, Sharma B, Saini S, Behera B, Saran S, Ganguly SK, Kumar U. Oligomeric Heterogeneous Double Metal Cyanide Catalyst for One‐pot Ring‐Opening Polymerization. ChemistrySelect 2023. [DOI: 10.1002/slct.202204760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- Akash Verma
- Polymeric Materials Area, Chemical and Material Sciences Division CSIR-Indian Institute of Petroleum Haridwar Road Dehradun 248005 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Bhawna Sharma
- Polymeric Materials Area, Chemical and Material Sciences Division CSIR-Indian Institute of Petroleum Haridwar Road Dehradun 248005 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Swati Saini
- Polymeric Materials Area, Chemical and Material Sciences Division CSIR-Indian Institute of Petroleum Haridwar Road Dehradun 248005 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Babita Behera
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- Analytical Sciences Division CSIR-Indian Institute of Petroleum Haridwar Road Dehradun 248005 India
| | - Sandeep Saran
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- Analytical Sciences Division CSIR-Indian Institute of Petroleum Haridwar Road Dehradun 248005 India
| | - Sudip K. Ganguly
- Polymeric Materials Area, Chemical and Material Sciences Division CSIR-Indian Institute of Petroleum Haridwar Road Dehradun 248005 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Umesh Kumar
- Polymeric Materials Area, Chemical and Material Sciences Division CSIR-Indian Institute of Petroleum Haridwar Road Dehradun 248005 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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Verma A, Saini S, Sharma B, Verma V, Behera B, Singh R, Ganguly SK, Ray A, Vorontsov A, Kumar U. EDTA incorporated Fe-Zn double metal cyanide catalyst for the controlled synthesis of polyoxypropylene glycol. JOURNAL OF POLYMER RESEARCH 2023. [DOI: 10.1007/s10965-022-03407-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Milocco F, Chiarioni G, Pescarmona PP. Heterogeneous catalysts for the conversion of CO2 into cyclic and polymeric carbonates. ADVANCES IN CATALYSIS 2022. [DOI: 10.1016/bs.acat.2022.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Earth-abundant bimetallic and multimetallic catalysts for Epoxide/CO2 ring-opening copolymerization. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132433] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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DMC-Mediated Copolymerization of CO2 and PO—Mechanistic Aspects Derived from Feed and Polymer Composition. Catalysts 2020. [DOI: 10.3390/catal10091066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The influence of composition of liquid phase on composition of poly(propylene ether carbonates) in the copolymerization of CO2 with propylene oxide (PO), mediated by a zinc chloride cobalt double metal cyanide, was monitored by FT-IR/CO2 uptake/size exclusion chromatography in batch and semi-batch mode. The ratio of mol fractions of carbonate to ether linkages F (~0.15) was found virtually independent on the feed between 60 and 120 °C. The presence of CO2 lowers the catalytic activity but yields more narrowly distributed poly(propylene ether carbonates). Hints on diffusion and chemistry-related restrictions were found underlying, broadening the distribution. The incorporation of CO2 seems to proceed in a metal-based insertion chain process, ether linkages are generated stepwise after external nucleophilic attack. The presence of amines resulted in lower activities and no change in F. An exchange of chloride for nitrate in the catalyst led to a higher F of max. 0.45. The observations are interpreted in a mechanistic scheme, comprising surface-base-assisted nucleophilic attack of external weak nucleophiles and of mobile surface-bound carboxylato entities on activated PO in competition to protonation of surface-bound alkoxide intermediates by poly(propylene ether carbonate) glycols or by surface-bound protons. Basic entities on the catalyst may promote CO2 incorporation.
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