淡江大學機構典藏:Item 987654321/74134
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 62797/95867 (66%)
造访人次 : 3731086      在线人数 : 634
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: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/74134


    题名: 在氧化還原反應中配位基保護金奈米粒子穩定性機制之探討
    其它题名: Mechanism study on the stability of ligand-protected gold nanoparticles in redox reactions
    作者: 許宏瑋;Shiu, Hung-Wei
    贡献者: 淡江大學化學學系碩士班
    鄧金培
    关键词: 金奈米粒子;氧化還原反應;硫醇交換;gold nanoparticle;redox reactions;thiol exchange
    日期: 2011
    上传时间: 2011-12-28 18:07:37 (UTC+8)
    摘要: 在本論文中,利用不同硫醇保護基進行表面修飾金奈米粒子,硫醇保護基可分為兩類,一為含羧酸根的硫醇基,DL-mercaptosuccinic acid (MSA),Meso-2,3-dimercaptosuccinic acid,4-mercaptobenzoic acid,二為中性的烷基硫醇,四烷基硫醇和十二烷基硫醇。在進行氧化及還原反應的過程,MSA會不可逆的脫附從金奈米粒子的表面,然而四烷基硫醇和十二烷基硫醇卻不會發生此現象。在溶液中的保護基與金奈米粒子表面保護基之交換實驗中,烷基硫醇修飾的金奈米粒子沒有與溶液中的MSA交換,但可能有雙硫醇產物的形成,此產物的形成可能與金奈米粒子和O2 有關。最後,催化的實驗發現,未修飾的金奈米粒子催化效果最好,MSA修飾的金奈米粒子次之,烷基硫醇修飾的金奈米粒子則最差。
    Several protecting molecules were employed to modify the surface of gold nanoparticles (AuNPs). The extra functional groups of the protecting thiol molecules used are both carboxylice acid and alkane in the other end. DL-mercaptosuccinic acid, meso-2,3-dimercaptosuccinic acid, and 4-mercaptobenzoic acid are included in the former. The latter contains of 1-butanethiol and 1-dodecanethiol. Furthermore, the activities of the thiol-protected gold nanoparticles were studied in redox reactions. MSA irreversibly desorbed from the surface of the AuNPs in the process. But the similar phenomenon could not be observed for 1-butanethiol and 1-dodecanethiol. In the thiol-exchange reaction for free thiol in solution and thiol-protected AuNPs, alkyl thiol-modified gold nanoparticles did not exchange with the free MSA, but a product of dithiol could be formed. The formation of could be related to both gold nanoparticles and O2. Finally, the catalytic experiments show that AuNPs has the highest catalytic activity compared with MSA-modified AuNPs and alkyl-thiol modified AuNPs with the poor activity.
    显示于类别:[化學學系暨研究所] 學位論文

    文件中的档案:

    档案 大小格式浏览次数
    index.html0KbHTML188检视/开启

    在機構典藏中所有的数据项都受到原著作权保护.

    TAIR相关文章

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