High-performance liquid chromatographic systems for the separation of buckminsterfullerene(C_(60)) and related fullerene C_(70) were investigated with methanol/benzene or methanol/toluene (35/65-60/40 in Ⅴ/Ⅴ) as elu...High-performance liquid chromatographic systems for the separation of buckminsterfullerene(C_(60)) and related fullerene C_(70) were investigated with methanol/benzene or methanol/toluene (35/65-60/40 in Ⅴ/Ⅴ) as eluant in C18 reversed phase column. The system is suitable for fast analysis of fullerenes at lower percentage of methanol, and repeatly large scale perparation at higher percentage of methanol.展开更多
A new type of bile pigments. 1, 2-bisdipyrrinone-ethylenes(1).were obtained with promising yields (25, 28, 28.5%, for the respective samples) by bromine oxidation of dipyrrinones (2) in methylene chloride.
1. 2-Bispyrroleethylenes can be easily syntnesized bv cc,-,pt}ng pyrrolealdehyde using TiCl_4/Zn as a catalyst. It was found that when the R group is COMe or CO_2 Et, the product is a mixture of trans and cis isomers,...1. 2-Bispyrroleethylenes can be easily syntnesized bv cc,-,pt}ng pyrrolealdehyde using TiCl_4/Zn as a catalyst. It was found that when the R group is COMe or CO_2 Et, the product is a mixture of trans and cis isomers, and in the other cases, the products are pure trans isomers.展开更多
Diphenylchlorin (DPC) and diphenylbacteriochlorin (DPBC) were synthesized for the first time from reduction of 5,10-diphenylporphyrin (DPP). As photosensitizers they have sizable absorption in the red region of the vi...Diphenylchlorin (DPC) and diphenylbacteriochlorin (DPBC) were synthesized for the first time from reduction of 5,10-diphenylporphyrin (DPP). As photosensitizers they have sizable absorption in the red region of the visible spectrum. The high yield of DPC.-photosensitized generation Of O-1(2), and the EPR studies in homogenerous solution showed that the photodynamic action of DPP-based photosensitizers may proceed via type I and type II machanisms.展开更多
文摘High-performance liquid chromatographic systems for the separation of buckminsterfullerene(C_(60)) and related fullerene C_(70) were investigated with methanol/benzene or methanol/toluene (35/65-60/40 in Ⅴ/Ⅴ) as eluant in C18 reversed phase column. The system is suitable for fast analysis of fullerenes at lower percentage of methanol, and repeatly large scale perparation at higher percentage of methanol.
文摘A new type of bile pigments. 1, 2-bisdipyrrinone-ethylenes(1).were obtained with promising yields (25, 28, 28.5%, for the respective samples) by bromine oxidation of dipyrrinones (2) in methylene chloride.
文摘1. 2-Bispyrroleethylenes can be easily syntnesized bv cc,-,pt}ng pyrrolealdehyde using TiCl_4/Zn as a catalyst. It was found that when the R group is COMe or CO_2 Et, the product is a mixture of trans and cis isomers, and in the other cases, the products are pure trans isomers.
文摘Diphenylchlorin (DPC) and diphenylbacteriochlorin (DPBC) were synthesized for the first time from reduction of 5,10-diphenylporphyrin (DPP). As photosensitizers they have sizable absorption in the red region of the visible spectrum. The high yield of DPC.-photosensitized generation Of O-1(2), and the EPR studies in homogenerous solution showed that the photodynamic action of DPP-based photosensitizers may proceed via type I and type II machanisms.
