Copolymerization of Carbonyl Sulfide and Propylene Oxide via a Heterogeneous Prussian Blue Analogue Catalyst with High Productivity and Selectivity

This study demonstrates the superiority of a stable and well‐defined heterogeneous cobalt hexacyanocobaltate (Co3[Co(CN)6]2), a typical cobalt Prussian Blue Analogue (CoCo‐PBA) that catalyzes the copolymerization of carbonyl sulfide (COS) and propylene oxide (PO) to produce poly(propylene monothioca...

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Bibliographic Details
Published in:Chemistry, an Asian journal an Asian journal, 2023-01, Vol.18 (1), p.e202201050-n/a
Main Authors: Ullah Khan, Munir, Ullah Khan, Safir, Cao, Xiaohan, Usman, Muhammad, Yue, Xinchen, Ghaffar, Abdul, Hassan, Muhammad, Zhang, Chengjian, Zhang, Xinghong
Format: Article
Language:English
Subjects:
Carbonyl sulfide
Carbonyls
Catalysis
Catalysts
Chemistry
Co3[Co(CN)6]2
Cobalt
Copolymerization
Copolymers
Heterogeneous catalysis
Pigments
Poly(propylene monothiocarbonate)s
Polydispersity
Polymers
Productivity
Propylene oxide
Selectivity
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Summary:This study demonstrates the superiority of a stable and well‐defined heterogeneous cobalt hexacyanocobaltate (Co3[Co(CN)6]2), a typical cobalt Prussian Blue Analogue (CoCo‐PBA) that catalyzes the copolymerization of carbonyl sulfide (COS) and propylene oxide (PO) to produce poly(propylene monothiocarbonate)s (PPMTC). The number‐average molecular weights of the PPMTC were 66.4 to 139.4 kg/mol, with a polydispersity of 2.0–3.9. The catalyst productivity reached 1040 g polymer/g catalyst (12.0 h). The oxygen‐sulfur exchange reaction (O/S ER), which would generate random thiocarbonate and carbonate units, was effectively suppressed, and thus the selectivity of the monothiocarbonate over carbonate linkages was up to >99%. It was shown that no cyclic thiocarbonate byproduct was produced during the heterogeneous catalysis of COS/PO copolymerization using CoCo‐PBA as the catalyst. The content of monothiocarbonate and ether units in the copolymer chain could be regulated by tuning the feeding amount of COS. The synthesis of poly(propylene monothiocarbonate)s from COS/PO copolymerization under mild conditions using the heterogeneous catalyst CoCo‐PBA is reported.
ISSN:1861-4728
1861-471X
DOI:10.1002/asia.202201050