The aggregating properties of Cz-C-n (n = 3, 6, 10) have been investigated by means of fluorescence method in DMSO-H2O binary solvent. The measured CAC and C F values indicate that the aggregating tendency of the amp...The aggregating properties of Cz-C-n (n = 3, 6, 10) have been investigated by means of fluorescence method in DMSO-H2O binary solvent. The measured CAC and C F values indicate that the aggregating tendency of the amphiphilic compounds Cz-C-n containing crown ether increases with the length of alkyl chains, similar to that of carbazole compounds with long alkyl chains.展开更多
The photoisomerization of provitamin D-3 is carrried out in silica gel-hexane matrix, ethanol and hexane. The results show that in silica gel-hexane matrix and ethanol, the desired product of provitamin D-3 and vitami...The photoisomerization of provitamin D-3 is carrried out in silica gel-hexane matrix, ethanol and hexane. The results show that in silica gel-hexane matrix and ethanol, the desired product of provitamin D-3 and vitamin D-3 can be obtained in high yield, while the undesirable byproducts are greatly limited.展开更多
基金We thank the National Natural Science Foundation of China. The foundation of the Ministry of Science and Technology of China (grant No. G2000078104 and No. G2000077502) for financial supports.
文摘The aggregating properties of Cz-C-n (n = 3, 6, 10) have been investigated by means of fluorescence method in DMSO-H2O binary solvent. The measured CAC and C F values indicate that the aggregating tendency of the amphiphilic compounds Cz-C-n containing crown ether increases with the length of alkyl chains, similar to that of carbazole compounds with long alkyl chains.
基金This work was supported by the National Natural Science Foundation of China, No. 29971031 and the Chinese Academy of Sciences.
文摘The photoisomerization of provitamin D-3 is carrried out in silica gel-hexane matrix, ethanol and hexane. The results show that in silica gel-hexane matrix and ethanol, the desired product of provitamin D-3 and vitamin D-3 can be obtained in high yield, while the undesirable byproducts are greatly limited.
