A fluorescent fluoride ion probe based on a self-organized ensemble of 5-hydroxyflavone - Al(III) complex

作者：Sathish R Sai; Raju A Goutam; Rao G Nageswara; Janardhana C^*

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2008, 69(1): 282-285.

DOI：10.1016/j.saa.2007.04.018

• 5-hydroxyflavone
• AlCl3
• complexation
• ligand exchange
• fluoride sensing
• AM1

In the presence of AI(111) ions, 5-hydroxyflavone (5HF) through a complexation reaction in MeOH, shows dual fluorescence, characterized by a newly developed peak at 554 nm upon excitation at 363 nm. In this communication, the subsequent ligand exchange reaction of the complex with fluoride ion causing a fluorescence enhancement followed by a decrease in fluorescence intensity involving an intermediate mechanistic pathway, delivering a quantitative estimation route for fluoride ion in the concentration range from 5 x 10(-5) to 7 x 10(-4) M, has been reported. The ligand exchange reaction, without interference from other common anions, has been investigated by UV-vis and fluorescence spectroscopies combined with the AMI semi-empirical self-consistent field quantum chemical calculations within UHF formalism in their ground state.

• 出版日期2008-1