| Title | Isomeric and structural impacts on electron acceptability of carbon cages in atom-bridged fullerene dimers |
| Authors | Sun, Baoyun Ren, Tongxiang Miao, Xiaopei Dai, Fucai Jin, Long Yuan, Hui Xing, Gengmei Li, Meixian Dong, Jinquan Chang, Fei Hu, Jingbo Chen, Hao Zhao, Feng Gao, Xueyun Zhao, Yuliang |
| Affiliation | Chinese Acad Sci, Inst High Energy Phys, Lab Biol Effects Nanomat & Nanosafety, Beijing 100049, Peoples R China. Natl Ctr Nanosci & Technol China, Beijing 100080, Peoples R China. Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China. Inner Mongolia Univ, Coll Chem & Chem Engn, Hohhot 010021, Peoples R China. Beijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China. |
| Keywords | ELECTROCHEMICAL PROPERTIES C-121 C-60 STABILITIES DERIVATIVES C-141 |
| Issue Date | 2008 |
| Publisher | journal of physical chemistry c |
| Citation | JOURNAL OF PHYSICAL CHEMISTRY C.2008,112,(3),741-746. |
| Abstract | The electrochemical properties of the carbon-bridged fullerene dimers C-121(I), C-121(II), C-121(III), C-131, and C-141 were characterized systematically for the first time in this study. Cyclic voltammogram and differential pulse voltammogram analyses revealed that they first underwent three reversible fullerene-unit-based reduction processes where each of the two carbon cages accepted one electron in each step and then possessed a different deep reduction sequence from the fourth to sixth reduction potentials of the fullerene cages. The electronic interactions between cages in the atom-bridged dimers (e.g., C-60-C-C-60) were found to be different from those of dimers in which two cages were connected directly. Comparison studies of the redox properties of the five dimers revealed that the C-60 dimerization via [5.6]-[6.6] connection influenced the cage electron acceptability much more than that of [5.6]-[5.6] or [6.6]-[6.6] connections And the dimerization with C-70 cages influenced the reduction potentials of dimerized products more potently than that with C-60 cages. Further results from controlled potential electrolysis, high-performance liquid chromatography, matrix-assisted laser desorption and ionization time-of-flight mass spectrometry, ultraviolet absorption spectral analyses demonstrated the reduction processes and a dissociation of the dimers based on reductions. The theoretical understanding of the experiments was investigated by using time-dependent density functional calculations for the ionic states Of C-121(I, II, III)(n-) with n = 0, 1, 2, 3, or 4. |
| URI | http://hdl.handle.net/20.500.11897/249579 |
| ISSN | 1932-7447 |
| DOI | 10.1021/jp0771217 |
| Indexed | SCI(E) EI |
| Appears in Collections: | å å¦ä¸ å å å·¥ç¨ å¦é ¢ |
