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Zhongqiu Liu,Yuanyuan Yu,Shengnan Li,Yaqi Liu,Guoqiang Zhang,Long Han,Yujing Liu,Jinmao You,Anguo Ying 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.104 No.-
The preparation of materials with a well-defined mesoporous structure and hydrophobicity is of greatsignificance for heterogeneous catalyst development, yet there still remains a challenge for fabricatingthe above materials without using templates. Herein, the polymerization of L-proline-functionalizedmonomer with crosslinkers containing variable alkyl-bridged length (n = 2,4,6,8) and vinyl-modifiedFe3O4 nanoparticles to construct mesoporous poly(L-proline)s (MPLPs) has been reported for the firsttime. The resultant MPLPs were analyzed by characterization methods, suggesting that MPLPs with awell-defined mesoporous structure and unique hydrophobicity were successfully constructed by synergisticregulation of vinyl-modified Fe3O4 nanoparticles and crosslinkers with alkyl-bridged length of 6carbon atoms, in which vinyl-modified Fe3O4 nanoparticles as structural reinforcer plays a vital rolefor the mesoporous formation. Moreover, the resultant MPLPs were found to be efficient catalysts forone-pot synthesis of functionalized spiroindolones and olefins. The kinetic study and the water contactangle indicate the mesoporous confinement and hydrophobic micro-environment in organic transformations. Hence, the high activity of MPLPs is ascribed to synergistic effect of mesoporous confinement andhydrophobic micro-environment, and the adsorption experiment results further confirm this synergisticcatalysis. This work promotes a textural engineering approach to the development of multifunctionalmaterials with well-defined mesopores and hydrophobicity.
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