With a 30 keV mini-separator at the accelerator laboratory of Fudan University,we have successfully obtained about 1 nA fullerene ion bea.m.Under the same conditions,we have also observed the fragment ions C_(n)^(+) (...With a 30 keV mini-separator at the accelerator laboratory of Fudan University,we have successfully obtained about 1 nA fullerene ion bea.m.Under the same conditions,we have also observed the fragment ions C_(n)^(+) (n=20-40).The C_(60)^(+) (C_(70)^(+)) beams will be used study collision between fullerene and electrons,atoms and photons.展开更多
The first binuclear iron fullerene derivative of(η 2 C 60 )[Fe(CO) 2(C 5H 5)] 2 , which was yellow brown and sensitive to air and moisture, was prepared by the reaction of trans [Fe(CO) 2(C 5H 5)] 2 with C 60 in benz...The first binuclear iron fullerene derivative of(η 2 C 60 )[Fe(CO) 2(C 5H 5)] 2 , which was yellow brown and sensitive to air and moisture, was prepared by the reaction of trans [Fe(CO) 2(C 5H 5)] 2 with C 60 in benzene under an atmosphere of dried nitrogen using conventional Schlenk techniques and has been characterized by using elementary analysis and IR, 1H NMR, 13 C NMR and XPS spectra. The infrared spectrum of the title compound indicates the disappearance of ν CO at 1 760 cm -1 for bridge carbonyl and the appearance of the only terminal CO lying at a higher wave number than that of the starting material, which reveals the electron deficient behavior of C 60 . And the important 1H, 13 C NMR chemical shift and XPS of trans [Fe(CO) 2(C 5H 5)] 2 , C 60 and its novel complex along with their relative assignments are briefly discussed.展开更多
The ability of water soluble β alanine C 60 adducts for superoxide anion radical scavenging has been studied by spectrophotometry and the modified pyrogallol auto oxidation method. It is found that β alanine C 60 ad...The ability of water soluble β alanine C 60 adducts for superoxide anion radical scavenging has been studied by spectrophotometry and the modified pyrogallol auto oxidation method. It is found that β alanine C 60 adducts have an excellent efficiency in eliminating superoxide radical generated from auto oxidation of pyrogallol. At a mass concentration level of 150 μg/mL for β alanine C 60 adducts, the radical scavenging efficiency is approximately equivalent to one enzyme unit, in vitro experiments show that β alanine C 60 adducts can enhance the activity of mouse thymus cells and prolong their life time span. It reveals the potential use of these β alanine C 60 adducts as the novel potent free radical scavengers in biological systems.展开更多
文摘With a 30 keV mini-separator at the accelerator laboratory of Fudan University,we have successfully obtained about 1 nA fullerene ion bea.m.Under the same conditions,we have also observed the fragment ions C_(n)^(+) (n=20-40).The C_(60)^(+) (C_(70)^(+)) beams will be used study collision between fullerene and electrons,atoms and photons.
文摘The first binuclear iron fullerene derivative of(η 2 C 60 )[Fe(CO) 2(C 5H 5)] 2 , which was yellow brown and sensitive to air and moisture, was prepared by the reaction of trans [Fe(CO) 2(C 5H 5)] 2 with C 60 in benzene under an atmosphere of dried nitrogen using conventional Schlenk techniques and has been characterized by using elementary analysis and IR, 1H NMR, 13 C NMR and XPS spectra. The infrared spectrum of the title compound indicates the disappearance of ν CO at 1 760 cm -1 for bridge carbonyl and the appearance of the only terminal CO lying at a higher wave number than that of the starting material, which reveals the electron deficient behavior of C 60 . And the important 1H, 13 C NMR chemical shift and XPS of trans [Fe(CO) 2(C 5H 5)] 2 , C 60 and its novel complex along with their relative assignments are briefly discussed.
文摘The ability of water soluble β alanine C 60 adducts for superoxide anion radical scavenging has been studied by spectrophotometry and the modified pyrogallol auto oxidation method. It is found that β alanine C 60 adducts have an excellent efficiency in eliminating superoxide radical generated from auto oxidation of pyrogallol. At a mass concentration level of 150 μg/mL for β alanine C 60 adducts, the radical scavenging efficiency is approximately equivalent to one enzyme unit, in vitro experiments show that β alanine C 60 adducts can enhance the activity of mouse thymus cells and prolong their life time span. It reveals the potential use of these β alanine C 60 adducts as the novel potent free radical scavengers in biological systems.
