The aim of this study was to rapidly isolate the major effective flavanoids from the extract of safflower（Carthamus tinctorius） using ODS medium pressure liquid chromatography（MPLC） and semi-preparative HPLC, guid...The aim of this study was to rapidly isolate the major effective flavanoids from the extract of safflower（Carthamus tinctorius） using ODS medium pressure liquid chromatography（MPLC） and semi-preparative HPLC, guided by a developed fingerprint. Twelve compounds were isolated and their structures were elucidated as kaempferol 3-O-β-D-rutinoside（1）, kaempferol 3-O-β-D-glucoside（2）, rutin（3）, quercetin 3-O-β-D-glucoside（4）, 6-hydroxykaempferol 3,6,7-tri-O-β-D-glucoside（5）, 6-hydroxykaempferol 3-O-β-D-glucoside（6）, 6-hydroxykaempferol 6,7-di-O-β-D-glucoside（7）, 6-hydroxykaempferol 3-O-β-Drutinoside（8）, 6-hydroxykaempferol 3,6-di-O-β-D-glucosyl 7-O-β-D-glucuronide（9）, isosafflomin C（10）, safflomin C（11） and hydroxysafflor yellow A（12） by spectroscopic analysis and comparing with the literature. Our results demonstrated that preparative pressurized liquid chromatography combined with HPLC fingerprint guide is an efficient tool to isolate the target compounds quickly.展开更多
TiO2 thin films deposited by magnetron sputtering possess excellent optical transmittance,high refractive index,good adhesion and chemical stability.In this manuscript,TiO2 thin films deposited by magnetron sputtering...TiO2 thin films deposited by magnetron sputtering possess excellent optical transmittance,high refractive index,good adhesion and chemical stability.In this manuscript,TiO2 thin films deposited by magnetron sputtering was used for the first time as an electron extraction layer in inverted polymer solar cells(IPSCs),and the effect of the TiO2 thickness on the photovoltaic performance of P3HT:PC61BM IPSCs was investigated.The highest PCE value of 3.75%was obtained when the thickness of TiO2thin films was in the range between 42 nm and 73 nm.The absorption properties,morphology and structure of the TiO2 films were characterized by UV-Vis spectroscopy,SEM and Raman spectroscopy,and were related to the device performance of P3HT:PC61BM IPSCs.The results indicate that TiO2 films deposited by magnetron sputtering are an excellent electron extraction layer for IPSCs.展开更多
基金National Science Fund for Excellent Young Scholars(Grant No.81222051)National Key Technology R&D Program"New Drug Innovation"of China(Grant No.2012ZX09103201-036,2012ZX09301002-002-002 and 2012ZX09304-005)
文摘The aim of this study was to rapidly isolate the major effective flavanoids from the extract of safflower（Carthamus tinctorius） using ODS medium pressure liquid chromatography（MPLC） and semi-preparative HPLC, guided by a developed fingerprint. Twelve compounds were isolated and their structures were elucidated as kaempferol 3-O-β-D-rutinoside（1）, kaempferol 3-O-β-D-glucoside（2）, rutin（3）, quercetin 3-O-β-D-glucoside（4）, 6-hydroxykaempferol 3,6,7-tri-O-β-D-glucoside（5）, 6-hydroxykaempferol 3-O-β-D-glucoside（6）, 6-hydroxykaempferol 6,7-di-O-β-D-glucoside（7）, 6-hydroxykaempferol 3-O-β-Drutinoside（8）, 6-hydroxykaempferol 3,6-di-O-β-D-glucosyl 7-O-β-D-glucuronide（9）, isosafflomin C（10）, safflomin C（11） and hydroxysafflor yellow A（12） by spectroscopic analysis and comparing with the literature. Our results demonstrated that preparative pressurized liquid chromatography combined with HPLC fingerprint guide is an efficient tool to isolate the target compounds quickly.
基金financially supported the National Natural Science Foundation of China (20904057 21074055)+3 种基金the Open Fund of Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province (12K049)Beijing Natural Science Foundation (2122050)Basic Research Foundation of the Central Universities (2013JBZ004)J. Zhang acknowledges support by the "100 Talents Program" of the Chinese Academy of Sciences
文摘TiO2 thin films deposited by magnetron sputtering possess excellent optical transmittance,high refractive index,good adhesion and chemical stability.In this manuscript,TiO2 thin films deposited by magnetron sputtering was used for the first time as an electron extraction layer in inverted polymer solar cells(IPSCs),and the effect of the TiO2 thickness on the photovoltaic performance of P3HT:PC61BM IPSCs was investigated.The highest PCE value of 3.75%was obtained when the thickness of TiO2thin films was in the range between 42 nm and 73 nm.The absorption properties,morphology and structure of the TiO2 films were characterized by UV-Vis spectroscopy,SEM and Raman spectroscopy,and were related to the device performance of P3HT:PC61BM IPSCs.The results indicate that TiO2 films deposited by magnetron sputtering are an excellent electron extraction layer for IPSCs.
