Solvent-dependent selective fluorescence assay of aluminum and gallium ions using julolidine-based probe

Jin Young Noh, Soojin Kim, In Hong Hwang, Ga Ye Lee, Juhye Kang, So Hyun Kim, Jisook Min, Sungsu Park, Cheal Kim, Jinheung Kim

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Abstract

The selective assay of aluminum and gallium ions is reported using fluorescence enhancement of a julolidine-based probe (PJI) in aqueous and nonaqueous solvents. The binding properties of PJI with metal ions were investigated by UV-vis, fluorescence, and electrospray ionization mass spectrometry. PJI gave no fluorescence in water, dimethylformamide, and methanol. The addition of aluminum ions switches on the fluorescence of the sensor PJI in both buffer and dimethylformamide, while other metal ions show no significant fluorescence changes. However, in methanol, its fluorescence can be selectively turned from a turn-on fluorescent sensor for gallium ions. The complex stability constants (Ka) for the respective stoichiometric 1:1 complexation of PJI with aluminium and gallium ions were obtained by fluorimetric titrations.

Original languageEnglish
Pages (from-to)1016-1021
Number of pages6
JournalDyes and Pigments
Volume99
Issue number3
DOIs
StatePublished - 2013

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea Grant funded by the Korea Government ( 2012008875 , 2012001725 , NRF-2013R1A2A2A03015101 ), the Converging Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011K000675 ), the National R&D program of the Ministry of Education, Science and Technology (MEST), Korea: Development of Molecular Sensing Technology (Code number 2012-009832), and BK21 (to S.K. and G.Y.L.).

Keywords

  • Aluminum ions
  • Fluorescence chemosensor
  • Gallium ions
  • Julolidine
  • Solvent dependence
  • Turn-on sensor

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