Title page for etd-0601114-163534


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URN etd-0601114-163534
Author Keng-Fu Wu
Author's Email Address No Public.
Statistics This thesis had been viewed 5336 times. Download 804 times.
Department Chemistry
Year 2013
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Synthesis and Metal Ion Binding Behavior of 1,8-Bisisoxazole-9H-Carbazole Derivatives
Date of Defense 2014-06-17
Page Count 101
Keyword
  • copper (II)
  • molecular recognition
  • fluorescence quenching
  • metal ions
  • chemosensor
  • Abstract Carbazole based fluorescence chemosensor 23, 1,8-bis(3-phenyl-isoxazolyl)-3,6- di-tert-butyl-9H-carbazole, was prepared and characterized by NMR, MALDI-MS, absorption and emission spectroscopy.
      The sensing properties of 23 toward various metal ions were investigated in CH3CN solution. A highly selective fluorescent turn-off response is observed in the presence of copper (II) among other metal ions, as is observed with the addition of 10 equiv of Li+, Na+, K+, Mg2+, Ca2+, Ba2+, Cd3+, Mn2+, Ni2+, Ag+, Pb2+, Zn2+, Cu2+, Hg2+ ions. The fluorescence intensity is almost not influenced by the addition of other metal ions. A Job’s plot determining the stoichiometry ratio of 23 and Cu2+ in CH3CN indicates a simple one-to-one binding preference. The binding constant for Cu2+ ion with 23 is 2.2 × 104 M-1.
      Another carbazole based chemosensor 24 is derived from 23. We found that 24 can bind to six metal ions. Especially with nickel ions and zinc ions, significant color change can be easily observed by naked eyes.
    Advisory Committee
  • Chi-Wi Ong - chair
  • Sodio Chih-Neng Hsu - co-chair
  • Michael Yen-Nan Chiang - advisor
  • Files
  • etd-0601114-163534.pdf
  • Indicate in-campus at 2 year and off-campus access at 2 year.
    Date of Submission 2014-07-01

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