The synthesis of a novel α phosphorus containing spin trap, DEPDMPO(5 diethoxy Phosphoryl 2, 5 dimethyl 1 pyrroline \%N\% oxide) and the evaluation of its ability to spin trap the hydroxyl and the superoxide anion ra...The synthesis of a novel α phosphorus containing spin trap, DEPDMPO(5 diethoxy Phosphoryl 2, 5 dimethyl 1 pyrroline \%N\% oxide) and the evaluation of its ability to spin trap the hydroxyl and the superoxide anion radicals were described in the present article. The ability to trap an active superoxide anion radical generated in the photo system Ⅱ(PSII) and the stability of their spin adduct of DEPDMPO as well as three previously reported traps DMPO, DEPMPO and M 3PO were comparatively analyzed according to their chemical structures. In addition, the effects of 2 methyl and \%α\% phosphoryl substituted analogues of DMPO on the stabilities of the corresponding spin adduts were systematically展开更多
采用溶胶-凝胶法制备Y0.06Sr0.94Ti1-xFexO3-δ(x为原子分数。x=0.2,0.3,0.4,0.5)混合导体材料,用X射线衍射(XRD)分析该材料的物相,采用交流阻抗法和电子阻塞电极法分别测定其总电导率与离子电导率,研究铁含量对Y0.06Sr0.94T...采用溶胶-凝胶法制备Y0.06Sr0.94Ti1-xFexO3-δ(x为原子分数。x=0.2,0.3,0.4,0.5)混合导体材料,用X射线衍射(XRD)分析该材料的物相,采用交流阻抗法和电子阻塞电极法分别测定其总电导率与离子电导率,研究铁含量对Y0.06Sr0.94TiO3混合导体材料的结构及电性能的影响。结果表明该材料属于单一立方相钙钛矿结构;在测试温度范围内,Y0.06Sr0.94Ti1-xFexO3-δ的总电导率和离子电导率都随温度升高而增大;随 Fe 掺杂量增加,总电导率和离子电导率都增大。在800℃下Y0.06Sr0.94Ti1-xFexO3-δ(x=0.2,0.3,0.4,0.5)的总电导率为0.019~0.12 S/cm,离子电导率为0.0106~0.0153 S/cm。根据传导活化能可以看出,x从0.3增加到0.4时材料的传导机制发生改变。展开更多
文摘The synthesis of a novel α phosphorus containing spin trap, DEPDMPO(5 diethoxy Phosphoryl 2, 5 dimethyl 1 pyrroline \%N\% oxide) and the evaluation of its ability to spin trap the hydroxyl and the superoxide anion radicals were described in the present article. The ability to trap an active superoxide anion radical generated in the photo system Ⅱ(PSII) and the stability of their spin adduct of DEPDMPO as well as three previously reported traps DMPO, DEPMPO and M 3PO were comparatively analyzed according to their chemical structures. In addition, the effects of 2 methyl and \%α\% phosphoryl substituted analogues of DMPO on the stabilities of the corresponding spin adduts were systematically
文摘采用溶胶-凝胶法制备Y0.06Sr0.94Ti1-xFexO3-δ(x为原子分数。x=0.2,0.3,0.4,0.5)混合导体材料,用X射线衍射(XRD)分析该材料的物相,采用交流阻抗法和电子阻塞电极法分别测定其总电导率与离子电导率,研究铁含量对Y0.06Sr0.94TiO3混合导体材料的结构及电性能的影响。结果表明该材料属于单一立方相钙钛矿结构;在测试温度范围内,Y0.06Sr0.94Ti1-xFexO3-δ的总电导率和离子电导率都随温度升高而增大;随 Fe 掺杂量增加,总电导率和离子电导率都增大。在800℃下Y0.06Sr0.94Ti1-xFexO3-δ(x=0.2,0.3,0.4,0.5)的总电导率为0.019~0.12 S/cm,离子电导率为0.0106~0.0153 S/cm。根据传导活化能可以看出,x从0.3增加到0.4时材料的传导机制发生改变。