CAJ | 학술논문

为模拟细胞色素P-450酶的催化空腔场所,提高壳聚糖接枝四(对-羧基苯基)锰卟啉( Mn TCPP)的催化活性.采用冷冻干燥法制备纳米孔壳聚糖( np-CTS),并用酰化反应接枝四(对-羧基苯基)锰卟啉获得仿生催化材料― Mn TCPP/np-CTS,同时制备相应的无孔催化材料― Mn TCPP/nonp-CTS.用紫外可见光谱( UV-vis),傅里叶变换红外光谱( FT-IR),X射线( XRD),热重分析( TG)和扫描电镜( SEM)技术对其进行表征,并用于催化空气氧化乙苯研究.催化结果表明：在最佳反应条件下(145℃,0.8 MPa),纳米孔壳聚糖接枝四(对-羧基苯基)锰卟啉比无孔催化材料催化活性提高26%,醇酮收率提高38%.实验结果表明：纳米级空腔有利于充分发挥所固载的锰卟啉催化活性,最大程度地提高固载仿生催化材料的催化效率.
위모의세포색소P-450매적최화공강장소,제고각취당접지사(대-최기분기)맹계람( Mn TCPP)적최화활성.채용냉동간조법제비납미공각취당( np-CTS),병용선화반응접지사(대-최기분기)맹계람획득방생최화재료― Mn TCPP/np-CTS,동시제비상응적무공최화재료― Mn TCPP/nonp-CTS.용자외가견광보( UV-vis),부리협변환홍외광보( FT-IR),X사선( XRD),열중분석( TG)화소묘전경( SEM)기술대기진행표정,병용우최화공기양화을분연구.최화결과표명：재최가반응조건하(145℃,0.8 MPa),납미공각취당접지사(대-최기분기)맹계람비무공최화재료최화활성제고26%,순동수솔제고38%.실험결과표명：납미급공강유리우충분발휘소고재적맹계람최화활성,최대정도지제고고재방생최화재료적최화효솔.
To mimic the catalytic cavity site of Cytochrome P-450 enzyme, promoting the activity of chitosan grafted manganese tetra ( p-carboxylphenyl ) porphyrin ( Mn TCPP ) . Nan-porous chitosan ( np-CTS) was prepared by freeze drying method, to which was the Mn TCPP grafted by acylation, forming biomimetic catalytic material, Mn TCPP/ np-CTS. Non-porous chitosan grafted manganese tetra( p-carboxylphenyl) porphyrin( Mn TCPP/nonp-CTS) was prepared by a similar procedure. The materials were characterized by UV-Vis and FT-IR spectra, X-ray diffraction( XRD) pattern, ther-moanalyser( TG) and transmission electron microscope ( SEM) . The materials were used as a cata-lyst for an oxidation of ethylbenzene. The experimental results show that under an optimum oxidation conditions(145 ℃ and 0. 8 MPa) , the catalytic actvitiy of Mn TCPP/ np-CTS was 26% greater than that of Mn TCPP/ nonp-CTS, the yields ( keton and alcohol) of ethylbenzene oxidation over the for-mer was 38% greater than that over the latter. This indicates that the nano cavity in CTS benifite to fully displaying the catalytic activity of the CTS-grafted Mn TCPP and elevating the catalytic efficen-cy of the biomimetic catalytic material.