English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 59624/92934 (64%)
造访人次 : 824284      在线人数 : 42
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻

    jsp.display-item.identifier=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

    题名: 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
    贡献者: 淡江大學化學學系
    关键词: Fullerenols;Hydroxy addend;2D Schlegel diagrams
    日期: 2002-04-05
    上传时间: 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
    显示于类别:[化學學系暨研究所] 期刊論文


    档案 大小格式浏览次数



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