Alternating Copolymerization of Dihydrocoumarin and Epoxides Catalyzed by 1-Ethyl-3-methylimidazolium Chloride

Jing-Jing Yu; Yong-Li Li; Xue Wu; Zhi-Dong Li; Ye-Fan Liu; Yang Zhang; Peng-Fei Song

doi:10.1007/s10118-025-3336-4

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Alternating Copolymerization of Dihydrocoumarin and Epoxides Catalyzed by 1-Ethyl-3-methylimidazolium Chloride

RAPID COMMUNICATION | Updated：2025-05-20

- Alternating Copolymerization of Dihydrocoumarin and Epoxides Catalyzed by 1-Ethyl-3-methylimidazolium Chloride
- Chinese Journal of Polymer Science Vol. 43, Pages: 1-8(2025)
- Affiliations：
  
  College of Chemistry and Chemical Engineering, Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Northwest Normal University, Lanzhou 730070, China
- Author bio：
  
  songpf@nwnu.edu.cn
- Funds：
- DOI：10.1007/s10118-025-3336-4
  CLC：
- Received：07 January 2025，
  
  Revised：08 March 2025，
  
  Accepted：12 March 2025，
  
  Published Online：14 May 2025，
  
  Published：20 May 2025
- Accepted：
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Yu, J. J.; Li, Y. L.; Wu, X.; Li, Z. D.; Liu, Y. F.; Zhang, Y.; Song, P. F. Alternating copolymerization of dihydrocoumarin and epoxides catalyzed by 1-ethyl-3-methylimidazolium chloride. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-025-3336-4

Jing-Jing Yu, Yong-Li Li, Xue Wu, et al. Alternating Copolymerization of Dihydrocoumarin and Epoxides Catalyzed by 1-Ethyl-3-methylimidazolium Chloride[J/OL]. Chinese journal of polymer science, 2025, 431-8.
Yu, J. J.; Li, Y. L.; Wu, X.; Li, Z. D.; Liu, Y. F.; Zhang, Y.; Song, P. F. Alternating copolymerization of dihydrocoumarin and epoxides catalyzed by 1-ethyl-3-methylimidazolium chloride. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-025-3336-4 DOI：

Jing-Jing Yu, Yong-Li Li, Xue Wu, et al. Alternating Copolymerization of Dihydrocoumarin and Epoxides Catalyzed by 1-Ethyl-3-methylimidazolium Chloride[J/OL]. Chinese journal of polymer science, 2025, 431-8. DOI： 10.1007/s10118-025-3336-4.

摘要

The ring-opening alternating copolymerization (ROAC) of 3

4-dihydrocoumarin (DHC) and epoxides was developed using an imidazolium salt of 1-ethyl-3-methylimidazolium chloride (EMIMCl) as a catalyst. The metal-free catalytic process was investigated by DFT calculations

and the synergistic catalytic mechanism of EMIMCl for ROAC of DHC and epoxides was demonstrated.

Abstract

The ring-opening alternating copolymerization (ROAC) of 3

4-dihydrocoumarin (DHC)/epoxides has been successfully developed using an imidazolium salt of 1-ethyl-3-methylimidazolium chloride (EMIMCl) as a catalyst. The resulting copolymer has a molecular weight of 13.7 kg·mol

–1

a narrow molecular weight distribution of 1.03 and a strictly alternating structure. The MALDI-TOF MS characterization and DFT calculations including electrostatic potential (ESP)

hydrogen-atom abstraction (HAA)

independent gradient model based on hirshfeld partition (IGMH) and atoms-in-molecules (AIM) analysis were used to investigate the metal-free catalytic process. The synergistic effect of anions and cations of EMIMCl for ROAC of DHC and epoxides was demonstrated. This study provides a metal-free catalytic system for the facile synthesis of alternating polyesters from DHC.

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references

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