SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 50 ›› Issue (10): 155-167.DOI: 10.1016/j.cjche.2022.05.008

• Separation Science and Engineering • Previous Articles     Next Articles

Application of functionalized magnetic silica nanoparticles for selective induction of three coumarin metastable polymorphs

Yiqing Chen1, Xin Huang1,2, Suping Ding1, Yaoguang Feng1, Na Wang1,2, Hongxun Hao1,2,3   

  1. 1 National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    2 Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China;
    3 School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
  • Received:2022-03-17 Revised:2022-05-22 Online:2023-01-04 Published:2022-10-28
  • Contact: Xin Huang,E-mail:x_huang@tju.edu.cn;Hongxun Hao,E-mail:hongxunhao@tju.edu.cn
  • Supported by:
    The authors are very grateful for financial support from the National Natural Science Foundation of China (21908159) and the Tianjin Natural Science Foundation (18JCZDJC38100).

Application of functionalized magnetic silica nanoparticles for selective induction of three coumarin metastable polymorphs

Yiqing Chen1, Xin Huang1,2, Suping Ding1, Yaoguang Feng1, Na Wang1,2, Hongxun Hao1,2,3   

  1. 1 National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    2 Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China;
    3 School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
  • 通讯作者: Xin Huang,E-mail:x_huang@tju.edu.cn;Hongxun Hao,E-mail:hongxunhao@tju.edu.cn
  • 基金资助:
    The authors are very grateful for financial support from the National Natural Science Foundation of China (21908159) and the Tianjin Natural Science Foundation (18JCZDJC38100).

Abstract: The precise control of active pharmaceutical ingredient (API) crystal nucleation and polymorphism is a key consideration in pharmaceutical manufacturing. In this study, tunable nanoparticles were developed to regulate the nucleation process of coumarin. Magnetic silica nanoparticles with four different functional groups (—NH2, —COOH, —SH, —NCO) were prepared and coated on the substrate for inducing the crystallization of coumarin. Confined melt crystallization and microspacing sublimation crystallization methods were used to investigate the regulation mechanism. The results indicated that three metastable forms of coumarin can be obtained as pure components based on the combined influence of crystallization methods and functionalized nanoparticles. Form II could be selectively obtained by microspacing sublimation crystallization on Fe3O4@SiO2—SH substrates, and Form IV could be obtained by confined melt crystallization on Fe3O4@SiO2—NCO substrates. Form III could be obtained by further heating Form IV crystals to 52 ℃ on Fe3O4@SiO2—NCO substrates. Moreover, the polarized light microscopy results also indicated that the introduction of nanoparticles could also increase the stability of the metastable crystalline forms of coumarin. Finally, the diffusion and surface dynamics during nanoparticle induced crystallization were comparatively investigated and the corresponding polymorphic selectivity mechanism was proposed.

Key words: Polymorph, Functional nanoparticles, Surface interactions, Heterogeneous nucleation

摘要: The precise control of active pharmaceutical ingredient (API) crystal nucleation and polymorphism is a key consideration in pharmaceutical manufacturing. In this study, tunable nanoparticles were developed to regulate the nucleation process of coumarin. Magnetic silica nanoparticles with four different functional groups (—NH2, —COOH, —SH, —NCO) were prepared and coated on the substrate for inducing the crystallization of coumarin. Confined melt crystallization and microspacing sublimation crystallization methods were used to investigate the regulation mechanism. The results indicated that three metastable forms of coumarin can be obtained as pure components based on the combined influence of crystallization methods and functionalized nanoparticles. Form II could be selectively obtained by microspacing sublimation crystallization on Fe3O4@SiO2—SH substrates, and Form IV could be obtained by confined melt crystallization on Fe3O4@SiO2—NCO substrates. Form III could be obtained by further heating Form IV crystals to 52 ℃ on Fe3O4@SiO2—NCO substrates. Moreover, the polarized light microscopy results also indicated that the introduction of nanoparticles could also increase the stability of the metastable crystalline forms of coumarin. Finally, the diffusion and surface dynamics during nanoparticle induced crystallization were comparatively investigated and the corresponding polymorphic selectivity mechanism was proposed.

关键词: Polymorph, Functional nanoparticles, Surface interactions, Heterogeneous nucleation