English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 51296/86412 (59%)
造訪人次 : 8175021      線上人數 : 76
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/25391

    題名: Theoretical studies of C70(OH)n(n = 14, 16, 18 and 20)fullerenols
    作者: 王伯昌;Wang, B. C.;Wang, Houng-wei;Tso, Hsi-chun;Chen, Tun-li;陳敦禮;Chou, Yu-ma
    貢獻者: 淡江大學化學學系
    關鍵詞: Fullerenols;Hydroxy addend;2D Schlegel diagrams
    日期: 2002-04-05
    上傳時間: 2009-12-01
    出版者: Elsevier
    摘要: The experimental results indicated that polyhydroxylated C70 fullerene may generate water soluble C70(OH)n fullerenols with n=14, 16, 18 and 20. The plausible reaction mechanism has been proposed with the consideration of cyclosulfation and hydrolysis. According to the experimental results, the number of hydroxyl substitutes in C70(OH)n fullerenols should be even. Random subroutine in MS FORTRAN 5.0 program library and reaction-mechanism consideration were first used to generate the structure of possible isomers for C70(OH)14, C70(OH)16, C70(OH)18 and C70(OH)20 fullerenols and reaction precursors C70(SO4)7, C70(SO4)8, C70(SO4)9 and C70(SO4)10. The heats of formation, relative stability and optimized structures have been generated by semi-empirical PM3 calculation. Among the possible structures, the electronic structures of these having higher symmetry were then computed. According to the structure analysis, the relative stability of fullerenols depends on the number of hydroxy addends in the equatorial belt region. The 2D Schlegel diagrams of C70(OH)n fullerenols were presented for the geometrically optimized structure by PM3 calculations and contained exact positions of hydroxy addend in C70. These diagrams may be helpful in the investigation of the physical properties of starburst polymers or other groups substituted onto fullerenols. This theoretical computational procedure for searching possible isomers may be a helpful tool for isomer study with symmetry consideration.
    關聯: Journal of Molecular Structure : Theochem 581(1-3), pp.177-186
    DOI: 10.1016/S0166-1280(01)00756-4
    顯示於類別:[化學學系暨研究所] 期刊論文


    檔案 大小格式瀏覽次數



    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋