中文摘要：

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.

英文摘要：

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＆amp;nbsp;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.