A high temperature and high pressure method was used to efficiently and selectively extract metallofullerenes Ln m @C 2n (Ln=Y, Gd, Tb) in a closed stainless steel autoclave under inert gas protection. 1,2,3 Trichloro...A high temperature and high pressure method was used to efficiently and selectively extract metallofullerenes Ln m @C 2n (Ln=Y, Gd, Tb) in a closed stainless steel autoclave under inert gas protection. 1,2,3 Trichlorobenzene was found to be more effective and selective for the extraction of Ln@C 82 (Ln=Y, Gd, Tb) from empty fullerenes and other metallofullerene species.展开更多
Sm@C 82 (Ⅲ) was effectively extracted by the high temperature DMF extraction and separated in one step HPLC, making the further studies of its properties possible. The successful purification of Sm metallofullerene w...Sm@C 82 (Ⅲ) was effectively extracted by the high temperature DMF extraction and separated in one step HPLC, making the further studies of its properties possible. The successful purification of Sm metallofullerene with such a low yield indicates that the high temperature DMF extraction is much effective. The cyclic and differential pulse voltammgrams of the pure Sm@C 82 (Ⅲ) were first measured, indicating that it has a good electron accepted ability. Up to 6 electrons can be added to them. The analysis of the potentials, the potential differential and the number of electron transferred show that Sm prefers to take +2 charge state in the carbon cage. The study of electronic structure would help us to produce, extract more metallofullerenes and synthesize useful materials.展开更多
Three water-soluble metallofullerene derivatives have been synthesized. IR and XPS analysis indicate that they have average compositions of Gd@C 82(OH) 22, Gd@C 82(OH) 6 (NHCH 2CH 2SO 3H) 8 and Gd@C 82(OH) 5(NHCH 2COO...Three water-soluble metallofullerene derivatives have been synthesized. IR and XPS analysis indicate that they have average compositions of Gd@C 82(OH) 22, Gd@C 82(OH) 6 (NHCH 2CH 2SO 3H) 8 and Gd@C 82(OH) 5(NHCH 2COOH) 9, respectively. They are particularly interesting in medical application.展开更多
采用电弧放电法制备内嵌镧金属富勒烯的原灰,通过改变氦气压力及电流强度来提高内嵌镧金属富勒烯产率。原灰由1,2,4-三氯苯提取并回溶入甲苯后,利用分析型高相液相色谱(HPLC)对提取液中各富勒烯组分进行分析。通过分别衡量3种常见含镧...采用电弧放电法制备内嵌镧金属富勒烯的原灰,通过改变氦气压力及电流强度来提高内嵌镧金属富勒烯产率。原灰由1,2,4-三氯苯提取并回溶入甲苯后,利用分析型高相液相色谱(HPLC)对提取液中各富勒烯组分进行分析。通过分别衡量3种常见含镧金属富勒烯La@C2v-C82、La@Cs-C82和La_2@C_(80)与C84的相对峰面积比,探讨了氦气压力和电流强度等对3种金属富勒烯产率的影响。实验结果表明,氦气压力与电流强度共同决定了金属富勒烯的产率,在(1)低电流高氦气压、(2)中等电流中等氦气压、(3)高电流低氦气压的条件下都可以高产率地获得含镧金属富勒烯。此外,调整电流强度和氦气压力可以改变La@C2v-C82和La@Cs-C82的相对比例。例如,在电流为100、120 A或氦气压为20、35 k Pa时,此前认为的"minor"异构体La@Cs-C82的含量甚至高于"major"异构体La@C2v-C82。还发现降低电流强度或减小氦气压力可促进La_2@C_(80)的生成,这表明La_2@C_(80)与La@C82的形成过程可能是不同的。展开更多
文摘A high temperature and high pressure method was used to efficiently and selectively extract metallofullerenes Ln m @C 2n (Ln=Y, Gd, Tb) in a closed stainless steel autoclave under inert gas protection. 1,2,3 Trichlorobenzene was found to be more effective and selective for the extraction of Ln@C 82 (Ln=Y, Gd, Tb) from empty fullerenes and other metallofullerene species.
文摘Sm@C 82 (Ⅲ) was effectively extracted by the high temperature DMF extraction and separated in one step HPLC, making the further studies of its properties possible. The successful purification of Sm metallofullerene with such a low yield indicates that the high temperature DMF extraction is much effective. The cyclic and differential pulse voltammgrams of the pure Sm@C 82 (Ⅲ) were first measured, indicating that it has a good electron accepted ability. Up to 6 electrons can be added to them. The analysis of the potentials, the potential differential and the number of electron transferred show that Sm prefers to take +2 charge state in the carbon cage. The study of electronic structure would help us to produce, extract more metallofullerenes and synthesize useful materials.
文摘Three water-soluble metallofullerene derivatives have been synthesized. IR and XPS analysis indicate that they have average compositions of Gd@C 82(OH) 22, Gd@C 82(OH) 6 (NHCH 2CH 2SO 3H) 8 and Gd@C 82(OH) 5(NHCH 2COOH) 9, respectively. They are particularly interesting in medical application.
基金National Nature Science Foundation of China (20971094,50874079)the Natural Science Foundation of Shanxi Province(2009021026)+2 种基金Program for New Century Excellent Talent in University (NCET20620262)International S & T-Operation Program (2007D FA50940)International Cooperation Program of Shanxi Province (2007081029,2009081046)~~
文摘采用电弧放电法制备内嵌镧金属富勒烯的原灰,通过改变氦气压力及电流强度来提高内嵌镧金属富勒烯产率。原灰由1,2,4-三氯苯提取并回溶入甲苯后,利用分析型高相液相色谱(HPLC)对提取液中各富勒烯组分进行分析。通过分别衡量3种常见含镧金属富勒烯La@C2v-C82、La@Cs-C82和La_2@C_(80)与C84的相对峰面积比,探讨了氦气压力和电流强度等对3种金属富勒烯产率的影响。实验结果表明,氦气压力与电流强度共同决定了金属富勒烯的产率,在(1)低电流高氦气压、(2)中等电流中等氦气压、(3)高电流低氦气压的条件下都可以高产率地获得含镧金属富勒烯。此外,调整电流强度和氦气压力可以改变La@C2v-C82和La@Cs-C82的相对比例。例如,在电流为100、120 A或氦气压为20、35 k Pa时,此前认为的"minor"异构体La@Cs-C82的含量甚至高于"major"异构体La@C2v-C82。还发现降低电流强度或减小氦气压力可促进La_2@C_(80)的生成,这表明La_2@C_(80)与La@C82的形成过程可能是不同的。
