English  |  正體中文  |  简体中文  |  Items with full text/Total items : 72880/72880 (100%)
Visitors : 23147943      Online Users : 578
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/5841

    Title: 利用Pentiptycene及Calix[4]arene設計與合成新型之螢光感應器
    Authors: 林哲生;Zhe-Sen Lin
    Contributors: 化學研究所
    Keywords: 螢光化學感應器;化學感應器;sensors
    Date: 2000-07-19
    Issue Date: 2009-09-22 10:08:30 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 本篇論文為設計與合成新型螢光化學感應器,以Pentiptycene與Calix[4] arenes這兩個分子作為感應器的主體,再應用分子內電荷轉移、光誘導性電子轉移及單體-二聚體激發狀態三個訊號傳遞原理,設計三個不同的感應分子,其中一個感應分子(F)順利合成出來,並針對鹼金、鹼土族及過渡金屬離子進行螢光量測。 結果顯示此化合物F對Ca2+離子及Cd2+離子的感應變化為pyrene monomer螢光增加而其excimer的螢光減弱,特別是此化合物對Cu2+離子的感應變造成excimer的螢光會有35nm(475nm~440nm)的藍位移現象,而monomer卻沒有改變。我們推論這結果是化合物F 與Cu2+離子錯合後形成之特殊結構所造成,進一步研究發現此一新現象只有在以Cu(ClO4)2無機鹽作為Cu2+離子的來源且溶於CH3CN中,再加至以CH2Cl2為溶劑之化合物F溶液才會發生,而螢光變化並不是隨Cu2+離子濃度增加而不斷增強,螢光強度最大的位置是Cu2+:化合物F之當量數比為10:1左右。 Three new fluorescent chemosensors have been designed, in which the pentiptycene or calix[4]arene scaffolds were adopted to form the receptors and the signal transductions was based on the intramolecular charge transfer(ICT), photo-induced electron transfer(PET), or monomer-excimer principles. One of them, the polyether-linked pentiptycene-bispyrene system (F), has been synthesized and its fluorescence response to some alkalii, alkaline earth, and transition metal ions has been studied. A decrease of the pyrene excimer emission with a concomitant increase of the pyrene monomer emission was observed for F in the presence of Ca2+ or Cd2+. In addition, a particular finding is the pronounced blue shift (from 475 to 440 nm) of the excimer emission in the case of Cu2+, indicating of the formation of a unique supramolecular structure. Results indicate that the blue-shifted excimer emission has a maximum intensity at ca. [Cu2+]/[F] = 10 and only occurs in the condition of F in CH2Cl2 and Cu(ClO4)2 predissolved in CH3CN.
    Appears in Collections:[化學研究所] 博碩士論文

    Files in This Item:

    File SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明