Pub Date : 2000-11-01DOI: 10.1080/10641220009351429
T. Oyama, T. Ishii, K. Takeuchi
Abstract Endohedral lanthanum fullerenes, La@C60, La@C82 and La2C80, were synthesized by ablation of graphite and La2O3 in flowing Ar buffer gas with a 1064 nm beam from a pulsed-Nd: YAG laser in which the graphite was heated by the CW-Nd:YAG laser up to 2500 °C. The La-fullerenes were also prepared by laser ablation of a lanthanum-graphite composite rod. The extractant fullerenes from the carbon soot were analyzed by laser-desorption time of flight mass spectrometry (LD-TOF MS). The relative yield of La@C82, increased with increasing temperature of the rod in the range of 700-2300 °C.
{"title":"Synthesis of Lanthanofullerenes by Laser Ablation Using Pulsed and CW-Nd:YAG Lasers","authors":"T. Oyama, T. Ishii, K. Takeuchi","doi":"10.1080/10641220009351429","DOIUrl":"https://doi.org/10.1080/10641220009351429","url":null,"abstract":"Abstract Endohedral lanthanum fullerenes, La@C60, La@C82 and La2C80, were synthesized by ablation of graphite and La2O3 in flowing Ar buffer gas with a 1064 nm beam from a pulsed-Nd: YAG laser in which the graphite was heated by the CW-Nd:YAG laser up to 2500 °C. The La-fullerenes were also prepared by laser ablation of a lanthanum-graphite composite rod. The extractant fullerenes from the carbon soot were analyzed by laser-desorption time of flight mass spectrometry (LD-TOF MS). The relative yield of La@C82, increased with increasing temperature of the rod in the range of 700-2300 °C.","PeriodicalId":12470,"journal":{"name":"Fullerene Science and Technology","volume":"9 1","pages":"491 - 499"},"PeriodicalIF":0.0,"publicationDate":"2000-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79938079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-11-01DOI: 10.1080/10641220009351431
N. Goldshleger, B. Tarasov, Y. Shul’ga, O. S. Roschupkina, A. A. Perov, A. Okotrub, A. P. Moravsky
Abstract C60Pt reacts with D2 (1-2 MPa D2 pressure and 373-723 K) to form C60Dx (x = 2-26) and Pt clusters. C60 in platinum fulleride is also reduced by dihydroanthracene to hydrofullerenes. The value of EbPt4f7/2 (72.4 eV) obtained for platinum in the starting C60Pt suggests partial charge transfer from the Pt atom to C60 in C60Pt.
{"title":"Platinum Fulleride Reduction by Molecular Deuterium or 9, 10-dihydroanthracene","authors":"N. Goldshleger, B. Tarasov, Y. Shul’ga, O. S. Roschupkina, A. A. Perov, A. Okotrub, A. P. Moravsky","doi":"10.1080/10641220009351431","DOIUrl":"https://doi.org/10.1080/10641220009351431","url":null,"abstract":"Abstract C60Pt reacts with D2 (1-2 MPa D2 pressure and 373-723 K) to form C60Dx (x = 2-26) and Pt clusters. C60 in platinum fulleride is also reduced by dihydroanthracene to hydrofullerenes. The value of EbPt4f7/2 (72.4 eV) obtained for platinum in the starting C60Pt suggests partial charge transfer from the Pt atom to C60 in C60Pt.","PeriodicalId":12470,"journal":{"name":"Fullerene Science and Technology","volume":"38 1","pages":"519 - 529"},"PeriodicalIF":0.0,"publicationDate":"2000-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76464190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-11-01DOI: 10.1080/10641220009351438
F. Cataldo, P. Ragni, M. Pentimalli
Abstract By treating a CCI4 solution of C60 in a sealed ampoule under argon with γ radiation generated by a 60Co source, chlorinated and trichloromethylated C60 oligomers (dimers, trimers) are produced. A total radiation dose of 122 kGy was used.
{"title":"Effects of γ Radiation on C60 Fullerene in CCI4 Solution","authors":"F. Cataldo, P. Ragni, M. Pentimalli","doi":"10.1080/10641220009351438","DOIUrl":"https://doi.org/10.1080/10641220009351438","url":null,"abstract":"Abstract By treating a CCI4 solution of C60 in a sealed ampoule under argon with γ radiation generated by a 60Co source, chlorinated and trichloromethylated C60 oligomers (dimers, trimers) are produced. A total radiation dose of 122 kGy was used.","PeriodicalId":12470,"journal":{"name":"Fullerene Science and Technology","volume":"36 11 1","pages":"623 - 631"},"PeriodicalIF":0.0,"publicationDate":"2000-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90658540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-11-01DOI: 10.1080/10641220009351434
N. Spitsina, S. V. Konovalikhin, A. Lobach, E. Golubev, M. Kaplunov, O. A. D’yachenko
Abstract New molecular complexes of [60]fullerene with 2-(4-thione-l,3-dithiolan-5-yliden)-4,5-dimethyl-l,3-diselenol [C60·2(DTDS)] have been synthesized, crystal structure, IR spectral and electrochemical properties have been studied. Partial charge transfer has been found. An unusual shortening of the endocyclic S-C(sp2) bond in the DTDS molecule has been found to be stipulated by conformational vibrations of the >CH2 group. A comparative analysis of the X-ray data for the [C60·2(DTDS)] crystals and the quantum chemical calculations (SCF MO, 6-31G* basis) for the DTDS molecules and its radical ions showed charge transfer not to be the cause for the shortening of the exocyclic C=S bonds.
{"title":"Molecular Complex of [60]Fullerene with 2-(4-thione-l,3-dithiolan-5-yliden)-4,5-dimethyl-1,3-diselenol [C60·2(DTDS)]: Synthesis, Crystal Structure and Properties","authors":"N. Spitsina, S. V. Konovalikhin, A. Lobach, E. Golubev, M. Kaplunov, O. A. D’yachenko","doi":"10.1080/10641220009351434","DOIUrl":"https://doi.org/10.1080/10641220009351434","url":null,"abstract":"Abstract New molecular complexes of [60]fullerene with 2-(4-thione-l,3-dithiolan-5-yliden)-4,5-dimethyl-l,3-diselenol [C60·2(DTDS)] have been synthesized, crystal structure, IR spectral and electrochemical properties have been studied. Partial charge transfer has been found. An unusual shortening of the endocyclic S-C(sp2) bond in the DTDS molecule has been found to be stipulated by conformational vibrations of the >CH2 group. A comparative analysis of the X-ray data for the [C60·2(DTDS)] crystals and the quantum chemical calculations (SCF MO, 6-31G* basis) for the DTDS molecules and its radical ions showed charge transfer not to be the cause for the shortening of the exocyclic C=S bonds.","PeriodicalId":12470,"journal":{"name":"Fullerene Science and Technology","volume":"13 1","pages":"561 - 576"},"PeriodicalIF":0.0,"publicationDate":"2000-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74567910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-11-01DOI: 10.1080/10641220009351426
A. Đerić, M. Veljković, O. M. Nešković, M. Miletić, K. Zmbov
Abstract We have studied the Li/C60 system by the surface ionization mass spectrometry. We have investigated a possibility of the Li@C60 formation via the collisions between Li+and C60 − ions in a plasma state, which was predicted by an ab initio molecular dynamics simulation. The LiC60 complex was unambiguously observed. Our results do not allow direct determination of the LiC60 structure but indicate that Li is inside the C60 cage. We have determined the ionization potential of Li@C60 complex (IP = 5.9 ± 0.1 eV), which agrees well with the calculated value of the IP of Li@C60.
{"title":"Surface Ionization Mass Spectrometric Studies of the Li/C60 System","authors":"A. Đerić, M. Veljković, O. M. Nešković, M. Miletić, K. Zmbov","doi":"10.1080/10641220009351426","DOIUrl":"https://doi.org/10.1080/10641220009351426","url":null,"abstract":"Abstract We have studied the Li/C60 system by the surface ionization mass spectrometry. We have investigated a possibility of the Li@C60 formation via the collisions between Li+and C60 − ions in a plasma state, which was predicted by an ab initio molecular dynamics simulation. The LiC60 complex was unambiguously observed. Our results do not allow direct determination of the LiC60 structure but indicate that Li is inside the C60 cage. We have determined the ionization potential of Li@C60 complex (IP = 5.9 ± 0.1 eV), which agrees well with the calculated value of the IP of Li@C60.","PeriodicalId":12470,"journal":{"name":"Fullerene Science and Technology","volume":"16 1","pages":"461 - 473"},"PeriodicalIF":0.0,"publicationDate":"2000-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88347089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-11-01DOI: 10.1080/10641220009351432
Lixin Xiao, K. Kitazawa, K. Saigo
Abstract A series of [60]fullerene pearl-necklace polyamides, consisting of equatorial-[60]fullerenobisacetic acid and various chromophoric aromatic diamines, were synthesized by a phosphorylation route using large amounts of triphenyl phosphite and pyridine as condensing reagents with stepwise addition of the condensing reagents. In the present polymers, [60]fullerene pearls and diamine linkers were attached to one another by cyclopropane connectors. The polyamides had weight-average molecular weights (Mw)of 4.5-5.0×104 g/mol and inherent viscosities (n inh) of 0.3-0.4 dL/g in N, N-dimethylacetamide (DMAc) at 30 °C. They had glass transition temperatures at 30-125 °C and decomposition temperatures at 300-310 °C. The UV-VIS spectra in DMAc exhibited broad absorption with λmax at 310-390 nm tailing to longer wavelengths.
{"title":"Synthesis of High-Molecular-Weight [60]Fullerene Pearl-Necklace Polyamides Derived from Equatorial [60]fullerenobisacetic Acid","authors":"Lixin Xiao, K. Kitazawa, K. Saigo","doi":"10.1080/10641220009351432","DOIUrl":"https://doi.org/10.1080/10641220009351432","url":null,"abstract":"Abstract A series of [60]fullerene pearl-necklace polyamides, consisting of equatorial-[60]fullerenobisacetic acid and various chromophoric aromatic diamines, were synthesized by a phosphorylation route using large amounts of triphenyl phosphite and pyridine as condensing reagents with stepwise addition of the condensing reagents. In the present polymers, [60]fullerene pearls and diamine linkers were attached to one another by cyclopropane connectors. The polyamides had weight-average molecular weights (Mw)of 4.5-5.0×104 g/mol and inherent viscosities (n inh) of 0.3-0.4 dL/g in N, N-dimethylacetamide (DMAc) at 30 °C. They had glass transition temperatures at 30-125 °C and decomposition temperatures at 300-310 °C. The UV-VIS spectra in DMAc exhibited broad absorption with λmax at 310-390 nm tailing to longer wavelengths.","PeriodicalId":12470,"journal":{"name":"Fullerene Science and Technology","volume":"38 1","pages":"531 - 543"},"PeriodicalIF":0.0,"publicationDate":"2000-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78972204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-11-01DOI: 10.1080/10641220009351433
N. Dragoe, K. Nakahara, H. Shimotani, L. Xiao, S. Tanibayashi, T. Higuchi, K. Kitazawa
Abstract The formation of all-carbon [60]fullerene derivatives was observed in the course of the thermolysis of methano-fullerene derivatives. IR, UV-Vis, GPC, 13C-NMR, TG-MS, TOF-MS and STM data are consistent with the formation of all-carbon [60]fullerene oligomers without a direct connection between fullerene cages but through one or two carbon atoms as bridges. Molecular masses up to 8000 amu have been detected by mass spectroscopy.
{"title":"All-Carbon [60]Fullerene Oligomers of Pearl-Necklace Type","authors":"N. Dragoe, K. Nakahara, H. Shimotani, L. Xiao, S. Tanibayashi, T. Higuchi, K. Kitazawa","doi":"10.1080/10641220009351433","DOIUrl":"https://doi.org/10.1080/10641220009351433","url":null,"abstract":"Abstract The formation of all-carbon [60]fullerene derivatives was observed in the course of the thermolysis of methano-fullerene derivatives. IR, UV-Vis, GPC, 13C-NMR, TG-MS, TOF-MS and STM data are consistent with the formation of all-carbon [60]fullerene oligomers without a direct connection between fullerene cages but through one or two carbon atoms as bridges. Molecular masses up to 8000 amu have been detected by mass spectroscopy.","PeriodicalId":12470,"journal":{"name":"Fullerene Science and Technology","volume":"38 1","pages":"545 - 559"},"PeriodicalIF":0.0,"publicationDate":"2000-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77527282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-11-01DOI: 10.1080/10641220009351435
F. Cataldo
Abstract C60 and C70 fullerene have been treated in sealed flasks under Ar with γ radiation using radiation dosages ranging from 10 to 1000 kGy. The treated samples studied by electronic and FT-IR spectroscopy have not shown any evidence about fullerenes decomposition or radiopolymerization. However, through Raman spectroscopy it was possible to observe that γ radiation induces C60 dimerization and trimerization. It has additionally been discovered that γ-treated C60 (oligomerized) can be easily photopolymerized in the solid state by post-irradiation with laser light at 514 nm while this phenomenon has not been observed by using laser light at 782 nm and considerably higher laser power. Previously to this study, C60 photopolymerization was known to occur only by using ultraviolet light. For comparison also graphite was irradiated with 1000 kGy of γ radiation. Irradiated graphite shows considerably changes in its Raman spectrum, showing the formation of glassy carbon domains, perhaps carbon onions. The ld bandshift to 1310 cm−1 could be interpreted in terms of formation of hexagonal diamond.
{"title":"On the Action of γ Radiation on Solid C60 and C70 Fullerenes: A Comparison with Graphite Irradiation","authors":"F. Cataldo","doi":"10.1080/10641220009351435","DOIUrl":"https://doi.org/10.1080/10641220009351435","url":null,"abstract":"Abstract C60 and C70 fullerene have been treated in sealed flasks under Ar with γ radiation using radiation dosages ranging from 10 to 1000 kGy. The treated samples studied by electronic and FT-IR spectroscopy have not shown any evidence about fullerenes decomposition or radiopolymerization. However, through Raman spectroscopy it was possible to observe that γ radiation induces C60 dimerization and trimerization. It has additionally been discovered that γ-treated C60 (oligomerized) can be easily photopolymerized in the solid state by post-irradiation with laser light at 514 nm while this phenomenon has not been observed by using laser light at 782 nm and considerably higher laser power. Previously to this study, C60 photopolymerization was known to occur only by using ultraviolet light. For comparison also graphite was irradiated with 1000 kGy of γ radiation. Irradiated graphite shows considerably changes in its Raman spectrum, showing the formation of glassy carbon domains, perhaps carbon onions. The ld bandshift to 1310 cm−1 could be interpreted in terms of formation of hexagonal diamond.","PeriodicalId":12470,"journal":{"name":"Fullerene Science and Technology","volume":"100 1","pages":"577 - 593"},"PeriodicalIF":0.0,"publicationDate":"2000-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79301307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-11-01DOI: 10.1080/10641220009351439
F. Cataldo
Abstract A brief comparison between the Raman spectra of C60 photopolymer with the C60 sonopolymer is presented. The spectrum of C70 photoproduct is also discussed.
摘要简要比较了C60光聚合物和C60声聚合物的拉曼光谱。讨论了C70光产物的光谱。
{"title":"Raman Spectra of Some Fullerene Polymers","authors":"F. Cataldo","doi":"10.1080/10641220009351439","DOIUrl":"https://doi.org/10.1080/10641220009351439","url":null,"abstract":"Abstract A brief comparison between the Raman spectra of C60 photopolymer with the C60 sonopolymer is presented. The spectrum of C70 photoproduct is also discussed.","PeriodicalId":12470,"journal":{"name":"Fullerene Science and Technology","volume":"15 1","pages":"633 - 637"},"PeriodicalIF":0.0,"publicationDate":"2000-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89634235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-11-01DOI: 10.1080/10641220009351428
B. Cao, Xihuang Zhou, Z. Gu, Hongzhan Xiao, Jingzun Wang
Abstract Some zirconium containing fullerenes were synthesized by vaporizing a zirconium-containing graphite anode with DC arc discharge technique, extracted by CS2 through low temperature extraction method, and characterized by field desorption mass spectra (FDMS). The results show that these doped fullerenes were zirconium cage-doped fullerenes.
{"title":"Zirconium Cage-Doped Fullerenes","authors":"B. Cao, Xihuang Zhou, Z. Gu, Hongzhan Xiao, Jingzun Wang","doi":"10.1080/10641220009351428","DOIUrl":"https://doi.org/10.1080/10641220009351428","url":null,"abstract":"Abstract Some zirconium containing fullerenes were synthesized by vaporizing a zirconium-containing graphite anode with DC arc discharge technique, extracted by CS2 through low temperature extraction method, and characterized by field desorption mass spectra (FDMS). The results show that these doped fullerenes were zirconium cage-doped fullerenes.","PeriodicalId":12470,"journal":{"name":"Fullerene Science and Technology","volume":"19 1","pages":"483 - 489"},"PeriodicalIF":0.0,"publicationDate":"2000-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91304216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：