A terbium(Ⅲ) complex [Tb2(NO3)(DMPA)5(phen) 2] (HDMPA=homoveratric acid, C12H12O4; phen=1,10- phenanthroline), was synthesized and characterized by elemental analysis, IR and TG-DTG. Its crystal structure was determi...A terbium(Ⅲ) complex [Tb2(NO3)(DMPA)5(phen) 2] (HDMPA=homoveratric acid, C12H12O4; phen=1,10- phenanthroline), was synthesized and characterized by elemental analysis, IR and TG-DTG. Its crystal structure was determined by single crystal X-ray diffraction method. The complex, C74H71N5O23Tb2, crystallizes in the monoclinic system, space group P21/n. The emission spectrum of complex, there are four main peaks, 489, 545, 584 and 622 nm, respectively, corresponding to 5D4→7F6, 5D4→7F5, 5D4→7F4 and 5D4→7F3 transitions of Tb(Ⅲ). The intensity of 5D4→7F5 is much stronger than others.展开更多
目的:设计合成一系列新的马蹄金素(Matijin-Su,MTS)衍生物,并研究其抗乙肝病毒(hepatitis B virus,HBV)活性。方法:以化合物MTS为先导化合物,通过引入藜芦酸结构单元,设计并合成了新型MTS衍生物,其结构经NMR,ESI-MS确认,并对所合成的目...目的:设计合成一系列新的马蹄金素(Matijin-Su,MTS)衍生物,并研究其抗乙肝病毒(hepatitis B virus,HBV)活性。方法:以化合物MTS为先导化合物,通过引入藜芦酸结构单元,设计并合成了新型MTS衍生物,其结构经NMR,ESI-MS确认,并对所合成的目标化合物进行体外细胞抗HBV活性测试。结果:设计并合成了20个含藜芦酸单元的MTS衍生物并进行了抗乙肝病毒的测试。化合物23,24,25表现出良好的抗HBV活性,其IC50为6. 17,9. 18和8. 29μmol·L-1。结论:含有藜芦酸结构的MTS衍生物具有进一步研究的价值。展开更多
目的建立基于多种内参物的一测多评法测定金莲清热颗粒中芒果苷、荭草素-2″-O-β-L-半乳糖苷、荭草苷、藜芦酸、牡荆苷和哈巴俄苷6个成分的含量。方法以Agilent Eclipse Plus C_(18)为色谱柱,以乙腈-0.1%磷酸溶液为流动相(梯度洗脱),...目的建立基于多种内参物的一测多评法测定金莲清热颗粒中芒果苷、荭草素-2″-O-β-L-半乳糖苷、荭草苷、藜芦酸、牡荆苷和哈巴俄苷6个成分的含量。方法以Agilent Eclipse Plus C_(18)为色谱柱,以乙腈-0.1%磷酸溶液为流动相(梯度洗脱),流速为1mL/min,柱温为30℃,检测波长为270 nm。分别以荭草苷、牡荆苷、荭草素-2″-O-β-L-半乳糖苷为内参物,采用一测多评法建立另外5个待测成分与内参物的相对校正因子,然后计算21批金莲清热颗粒样品中6个成分的含量,并与外标法测定结果进行比较。结果一测多评法测得21批金莲清热颗粒样品中芒果苷、荭草素-2″-O-β-L-半乳糖苷、荭草苷、藜芦酸、牡荆苷和哈巴俄苷的含量范围分别为0.234~0.516、1.804~2.270、2.143~2.606、0.190~0.223、0.594~0.782、0.080~0.152 mg/g,外标法测定结果分别为0.235~0.523、1.798~2.265、2.137~2.599、0.190~0.224、0.597~0.786、0.077~0.151 mg/g,2种方法所测结果的差异百分比不大于4.00%。结论建立了基于多种内参物同时测定金莲清热颗粒中6种成分含量的一测多评法,该方法与外标法所得结果无明显差异,可用于金莲清热颗粒的质量控制。展开更多
文摘A terbium(Ⅲ) complex [Tb2(NO3)(DMPA)5(phen) 2] (HDMPA=homoveratric acid, C12H12O4; phen=1,10- phenanthroline), was synthesized and characterized by elemental analysis, IR and TG-DTG. Its crystal structure was determined by single crystal X-ray diffraction method. The complex, C74H71N5O23Tb2, crystallizes in the monoclinic system, space group P21/n. The emission spectrum of complex, there are four main peaks, 489, 545, 584 and 622 nm, respectively, corresponding to 5D4→7F6, 5D4→7F5, 5D4→7F4 and 5D4→7F3 transitions of Tb(Ⅲ). The intensity of 5D4→7F5 is much stronger than others.