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Core-shell magnetic microspheres as heterogeneous catalyst for synthesis of benzimidazole

文献类型: 外文期刊

作者: Yang, Linyan 1 ; Chen, Lan 1 ; Guo, Jinwei 1 ; Li, Cun 1 ; Jin, Tianming 2 ;

作者机构: 1.Tianjin Agr Univ, Tianjin Key Lab Agr Anim Breeding & Hlth Husb, Coll Anim Sci & Vet Med, Tianjin, Peoples R China

2.Tianjin Acad Agr Sci, Tianjin 300392, Peoples R China

关键词: gamma-Fe2O3; core-shell; condensation reaction; catalytic activity

期刊名称:JOURNAL OF COORDINATION CHEMISTRY ( 影响因子:1.869; 五年影响因子:1.547 )

ISSN: 0095-8972

年卷期: 2022 年 75 卷 1-2 期

页码:

收录情况: SCI

摘要: gamma-Fe2O3 was used to prepare gamma-Fe2O3@SiO2, gamma-Fe2O3@SiO2-NH2 and gamma-Fe2O3@SiO2-NH2-COOH nanoparticles. Core-shell modification of IRMOF3 was used to obtain gamma-Fe2O3@SiO2-NH2-COOH/IRMOF3 nanoparticles. gamma-Fe2O3@SiO2-NH2-COOH/IRMOF3 nanoparticles were modified by activated arginine (Arg), glycine (Gly) and lysine (Lys) to synthesize gamma-Fe2O3@SiO2-NH2-COOH/IRMOF3-Arg, gamma-Fe2O3@SiO2-NH2-COOH/IRMOF3-Gly and gamma-Fe2O3@SiO2-NH2-COOH/IRMOF3-Lys nanoparticles. The products were used as catalysts for condensation reactions of benzaldehyde and o-phenylenediamine. Infrared spectroscopy (IR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) spectra were used for the characterization. gamma-Fe2O3@SiO2-NH2-COOH/IRMOF3-Gly nanoparticles showed outstanding catalytic effects as determined by a fluorescence spectrophotometer. In RP-HPLC spectra, the retention time of the reaction products was 2.458 min and 3.392 min. The results of the H-1 NMR (400 MHz, MeOH-d(6)) spectra showed gamma-Fe2O3@SiO2-NH2-COOH/IRMOF3-Gly nanoparticles to be more active. [GRAPHICS] .

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