The catalytic activity of copper zirconium phosphate(ZPCu) in the selective oxidation of alcohols to their corresponding ketones or aldehydes, using H2O2 as an oxidizing agent, was studied. The oxida‐tion reaction wa...The catalytic activity of copper zirconium phosphate(ZPCu) in the selective oxidation of alcohols to their corresponding ketones or aldehydes, using H2O2 as an oxidizing agent, was studied. The oxida‐tion reaction was performed without any organic solvent, phase‐transfer catalyst, or additive. Steric factors associated with the substrates influenced the reaction. The catalyst was characterized using X‐ray diffraction, inductively coupled plasma atomic emission spectroscopy, energy‐dispersive X‐ray spectroscopy, and scanning electron microscopy. It was shown that the interlayer distance increased from 0.74 to 0.80 nm and the crystallinity was reduced after Cu2+ intercalation into the layers. This catalyst can be recovered and reused three times without significant loss of activity and selectivity.展开更多
以护肝活性天然产物水飞蓟宾(silybin)为模板分子,甲基丙烯酸(methacrylic,MAA)为功能单体,N-异丙基丙烯酰胺(N-isopropyl acrylamide,NIPAm)为热响应单体,生物相容性壳聚糖包裹Fe 3O 4磁核作为载体,运用电子转移活化再生催化剂原子转...以护肝活性天然产物水飞蓟宾(silybin)为模板分子,甲基丙烯酸(methacrylic,MAA)为功能单体,N-异丙基丙烯酰胺(N-isopropyl acrylamide,NIPAm)为热响应单体,生物相容性壳聚糖包裹Fe 3O 4磁核作为载体,运用电子转移活化再生催化剂原子转移自由基聚合(activator regenerated by electron transfer atom transfer radical polymerization,ARGET ATRP)制备水飞蓟宾磁性分子印迹聚合物(molecularly imprinted polymers,MMIPs),并运用傅里叶变换红外光谱(fourier transform infrared spectroscopy,FT-IR)、(thermogravimetric analysis,TGA)、(scanning electron microscope,SEM)和(X-ray diffraction,XRD)对合成的磁性印迹材料进行了表征。MMIPs对水飞蓟宾的动态吸附行为可以通过准二级动力学模型解释说明。MMIPs的印迹因子γ为3.20、选择性因子α(2.636)及相对选择性因子β(2.468),反映了所合成的印迹材料对水飞蓟宾具有良好的特异性识别能力和选择性吸附能力。另外,通过八次循环利用实验,发现MMIPs的吸附量仅减少22 %,这说明了所制备的印迹材料尚具有良好的稳定性。展开更多
基金supported by the Isfahan University of Technology, Iran
文摘The catalytic activity of copper zirconium phosphate(ZPCu) in the selective oxidation of alcohols to their corresponding ketones or aldehydes, using H2O2 as an oxidizing agent, was studied. The oxida‐tion reaction was performed without any organic solvent, phase‐transfer catalyst, or additive. Steric factors associated with the substrates influenced the reaction. The catalyst was characterized using X‐ray diffraction, inductively coupled plasma atomic emission spectroscopy, energy‐dispersive X‐ray spectroscopy, and scanning electron microscopy. It was shown that the interlayer distance increased from 0.74 to 0.80 nm and the crystallinity was reduced after Cu2+ intercalation into the layers. This catalyst can be recovered and reused three times without significant loss of activity and selectivity.
文摘以护肝活性天然产物水飞蓟宾(silybin)为模板分子,甲基丙烯酸(methacrylic,MAA)为功能单体,N-异丙基丙烯酰胺(N-isopropyl acrylamide,NIPAm)为热响应单体,生物相容性壳聚糖包裹Fe 3O 4磁核作为载体,运用电子转移活化再生催化剂原子转移自由基聚合(activator regenerated by electron transfer atom transfer radical polymerization,ARGET ATRP)制备水飞蓟宾磁性分子印迹聚合物(molecularly imprinted polymers,MMIPs),并运用傅里叶变换红外光谱(fourier transform infrared spectroscopy,FT-IR)、(thermogravimetric analysis,TGA)、(scanning electron microscope,SEM)和(X-ray diffraction,XRD)对合成的磁性印迹材料进行了表征。MMIPs对水飞蓟宾的动态吸附行为可以通过准二级动力学模型解释说明。MMIPs的印迹因子γ为3.20、选择性因子α(2.636)及相对选择性因子β(2.468),反映了所合成的印迹材料对水飞蓟宾具有良好的特异性识别能力和选择性吸附能力。另外,通过八次循环利用实验,发现MMIPs的吸附量仅减少22 %,这说明了所制备的印迹材料尚具有良好的稳定性。
