The electrochemical behavior of the film of single wall carbon nanotube(SWNT) functionalized with carboxylic acid group was studied extensively at the glassy carbon(GC) electrode. One stable couple of waves correspond...The electrochemical behavior of the film of single wall carbon nanotube(SWNT) functionalized with carboxylic acid group was studied extensively at the glassy carbon(GC) electrode. One stable couple of waves corresponding to the redox of the carboxylic acid group, which was supported by the IR experiments, was observed. The electrode process involved four electrons, while the rate determining step was a one-electron reduction. The SWNT film modified electrode showed nice electrocatalytic behaviors toward the oxidations of some biomolecules such as dopamine, epinephrine and ascorbic acid.展开更多
Single wall carbon nanotube (SWNT) was prepared by d.c. arc discharge method and purified by filtration method. After refluxed in HNO 3, the ends of SWNT were opened and oxidized into carboxylate group, which may reac...Single wall carbon nanotube (SWNT) was prepared by d.c. arc discharge method and purified by filtration method. After refluxed in HNO 3, the ends of SWNT were opened and oxidized into carboxylate group, which may react with other reagents. For chemical modification of SWNT, the carboxyl terminated SWNT reacted with CH 3(CH 2) 15 NH 2 with the aid of the condensation agent DCC to obtain the derivatives of SWNT with the amido alkyl chain which enhanced the solubility of SWNT in organic solvent. The results of micro IR prove the formation of amido group in SWNT sample(\{ (CO)=\}1 647 cm -1 ). The FT Raman results show that SWNT sample preserve its structure after the condensation reaction( ω r=181 cm -1 ). [WT5HZ]展开更多
The solubilities of C60 and C70 in toluene, o-xylene and CS2 between melting point and boiling point have been measured. The temperature-dependent solubillty of C60 displays the anomalous behavior. A solubility maximu...The solubilities of C60 and C70 in toluene, o-xylene and CS2 between melting point and boiling point have been measured. The temperature-dependent solubillty of C60 displays the anomalous behavior. A solubility maximum of C60 around O℃ for toluene and CS2, and around 30℃ for o-xylene was observed. The temperature-dependent solu bility of C70 displays the normal behavior in the same solvents.展开更多
Using highly pure graphite rod and B4C/graphite composite rod as electrods, some macroscopic amounts of boron-doped fullerenes, such as C60-nBn and C70-nBn (n=1,2,3) are syn-thesized by DC arc burning method and extra...Using highly pure graphite rod and B4C/graphite composite rod as electrods, some macroscopic amounts of boron-doped fullerenes, such as C60-nBn and C70-nBn (n=1,2,3) are syn-thesized by DC arc burning method and extracted by o-xylene from the soots under nitrogen for the first time. The boron-doped fullerenes are characterized by FDMS.展开更多
The transition from carbon nanotubes to diamond nanocrystals by vacuum evaporation is reported. The nanocrystals were characterized by transition electron microscopy (TEM) and high resolution transition electron micro...The transition from carbon nanotubes to diamond nanocrystals by vacuum evaporation is reported. The nanocrystals were characterized by transition electron microscopy (TEM) and high resolution transition electron microscopy(HRTEM). The micrographs and corresponding diffraction patterns showed that the nanocrystals with perfect crystal structure conformed to diamond clusters. The transition mechanism and process are primarily discussed.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
文摘The electrochemical behavior of the film of single wall carbon nanotube(SWNT) functionalized with carboxylic acid group was studied extensively at the glassy carbon(GC) electrode. One stable couple of waves corresponding to the redox of the carboxylic acid group, which was supported by the IR experiments, was observed. The electrode process involved four electrons, while the rate determining step was a one-electron reduction. The SWNT film modified electrode showed nice electrocatalytic behaviors toward the oxidations of some biomolecules such as dopamine, epinephrine and ascorbic acid.
文摘Single wall carbon nanotube (SWNT) was prepared by d.c. arc discharge method and purified by filtration method. After refluxed in HNO 3, the ends of SWNT were opened and oxidized into carboxylate group, which may react with other reagents. For chemical modification of SWNT, the carboxyl terminated SWNT reacted with CH 3(CH 2) 15 NH 2 with the aid of the condensation agent DCC to obtain the derivatives of SWNT with the amido alkyl chain which enhanced the solubility of SWNT in organic solvent. The results of micro IR prove the formation of amido group in SWNT sample(\{ (CO)=\}1 647 cm -1 ). The FT Raman results show that SWNT sample preserve its structure after the condensation reaction( ω r=181 cm -1 ). [WT5HZ]
文摘The solubilities of C60 and C70 in toluene, o-xylene and CS2 between melting point and boiling point have been measured. The temperature-dependent solubillty of C60 displays the anomalous behavior. A solubility maximum of C60 around O℃ for toluene and CS2, and around 30℃ for o-xylene was observed. The temperature-dependent solu bility of C70 displays the normal behavior in the same solvents.
文摘Using highly pure graphite rod and B4C/graphite composite rod as electrods, some macroscopic amounts of boron-doped fullerenes, such as C60-nBn and C70-nBn (n=1,2,3) are syn-thesized by DC arc burning method and extracted by o-xylene from the soots under nitrogen for the first time. The boron-doped fullerenes are characterized by FDMS.
文摘The transition from carbon nanotubes to diamond nanocrystals by vacuum evaporation is reported. The nanocrystals were characterized by transition electron microscopy (TEM) and high resolution transition electron microscopy(HRTEM). The micrographs and corresponding diffraction patterns showed that the nanocrystals with perfect crystal structure conformed to diamond clusters. The transition mechanism and process are primarily discussed.
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.
