采用红外光谱并结合二维相关红外光谱法对生三七和熟三七进行了研究,分析比较三七炮制前后化学成分的变化。在一维红外谱图上,生三七和熟三七在1200~400 cm -1波段内的相似度较高,不同的是熟三七在2925,2855,1746,1460,1376,11...采用红外光谱并结合二维相关红外光谱法对生三七和熟三七进行了研究,分析比较三七炮制前后化学成分的变化。在一维红外谱图上,生三七和熟三七在1200~400 cm -1波段内的相似度较高,不同的是熟三七在2925,2855,1746,1460,1376,1158 cm -1出现了花生油的特征峰,这是由于采用煎炸法炮制三七所残留的花生油所引起的。两者药效组分的特征差异在二维相关红外谱图上显示得更为明显和直观,在1400~1700 cm-1区域,生三七仅在1650 cm-1附近有一个强自动峰,而熟三七在1469和1640 cm -1附近均有自动峰。在1120~1250 cm-1区域,生三七和熟三七共有1139(1137),1194(1196),1219(1221) cm -1三个自动峰,不同的是各自动峰的相对强度发生了变化,生三七经炮制后1139 cm -1峰的增强,而1194 cm -1峰减弱。二维相关红外光谱的变化规律说明了三七药材在炮制的过程中发生的主要变化是黄酮、糖类、皂苷等成分的分解。该方法揭示了三七在炮制过程中所发生的物理化学变化过程,从红外光谱的角度解释了三七“生消熟补”的药理。展开更多
Two compounds with 3-methylbenzoic acid(HL) [Co(L)2(4,4'-bipy)]n 1 and [Zn2(L)4(4,4'-bipy)]n 2(L = 3-methylbenzoic acid) have been hydrothermally synthesized directly and characterized by single-crystal ...Two compounds with 3-methylbenzoic acid(HL) [Co(L)2(4,4'-bipy)]n 1 and [Zn2(L)4(4,4'-bipy)]n 2(L = 3-methylbenzoic acid) have been hydrothermally synthesized directly and characterized by single-crystal X-ray diffraction analysis,elemental analyses,IR spectra and ultraviolet-visible diffuse reflection integral spectra(UV-Vis DRIS).The two compounds are both one-dimensional infinite chains.The structural difference is that 1 is a double-chain structure and 2 is only a single chain one.At the same time,the carboxylate groups adopt different modes in the two compounds,relatively.Additionally,in order to explore the structural characteristic,two-dimen-sional IR spectra are investigated for 1 and 2.Photo-luminescent property of 2 is also researched in detail.展开更多
文摘采用红外光谱并结合二维相关红外光谱法对生三七和熟三七进行了研究,分析比较三七炮制前后化学成分的变化。在一维红外谱图上,生三七和熟三七在1200~400 cm -1波段内的相似度较高,不同的是熟三七在2925,2855,1746,1460,1376,1158 cm -1出现了花生油的特征峰,这是由于采用煎炸法炮制三七所残留的花生油所引起的。两者药效组分的特征差异在二维相关红外谱图上显示得更为明显和直观,在1400~1700 cm-1区域,生三七仅在1650 cm-1附近有一个强自动峰,而熟三七在1469和1640 cm -1附近均有自动峰。在1120~1250 cm-1区域,生三七和熟三七共有1139(1137),1194(1196),1219(1221) cm -1三个自动峰,不同的是各自动峰的相对强度发生了变化,生三七经炮制后1139 cm -1峰的增强,而1194 cm -1峰减弱。二维相关红外光谱的变化规律说明了三七药材在炮制的过程中发生的主要变化是黄酮、糖类、皂苷等成分的分解。该方法揭示了三七在炮制过程中所发生的物理化学变化过程,从红外光谱的角度解释了三七“生消熟补”的药理。
基金supported by the National Natural Science Foundation of China (No. 20873021,21003020)New Century Excellent Talent Supported Plan of Fujian Province (SXSJRC2007-21)
文摘Two compounds with 3-methylbenzoic acid(HL) [Co(L)2(4,4'-bipy)]n 1 and [Zn2(L)4(4,4'-bipy)]n 2(L = 3-methylbenzoic acid) have been hydrothermally synthesized directly and characterized by single-crystal X-ray diffraction analysis,elemental analyses,IR spectra and ultraviolet-visible diffuse reflection integral spectra(UV-Vis DRIS).The two compounds are both one-dimensional infinite chains.The structural difference is that 1 is a double-chain structure and 2 is only a single chain one.At the same time,the carboxylate groups adopt different modes in the two compounds,relatively.Additionally,in order to explore the structural characteristic,two-dimen-sional IR spectra are investigated for 1 and 2.Photo-luminescent property of 2 is also researched in detail.