Absorption and fluorescence spectroscopy of 3-hydroxy-3-phenyl-1- o -carboxyphenyltriazene and its copper (II), nickel (II) and zinc (II) complexes: a novel fluorescence sensor

Absorption and fluorescence spectroscopy of 3-hydroxy-3-phenyl-1- o -carboxyphenyltriazene and... Absorption and fluorescence spectroscopic properties of 3-hydroxy-3-phenyl-1- o -carboxyphenyltriazene (HT) are studied. The mechanism of photo-induced electron transfer (PET) followed by energy transfer process of the ligand and the Cu (II), Ni (II) and Zn (II) metal complexes have been investigated. The excited state photo induced intramolecular hydrogen transfer from N–OH to triazene 1-nitrogen atom is explained. The effect of pH, solvent and concentration on the absorption and fluorescence of the ligand is studied and it has been found that the absorption and fluorescence of HT is highly pH, solvent and concentration dependent. Participation of the N–OH proton of HT in the solvent assisted O to N-proton transfer has also been proposed. The fluorescence band shift and changes in intensity is modulated by protonation and complexation with metal ions. This fluorophore can thus be used as a pH dependent and M ( n +1)+ /M n + redox on/off switchable molecular sensor. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Luminescence Elsevier

Absorption and fluorescence spectroscopy of 3-hydroxy-3-phenyl-1- o -carboxyphenyltriazene and its copper (II), nickel (II) and zinc (II) complexes: a novel fluorescence sensor

Journal of Luminescence, Volume 111 (3) – Feb 1, 2005

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Publisher
Elsevier
Copyright
Copyright © 2004 Elsevier Ltd
ISSN
0022-2313
eISSN
1872-7883
D.O.I.
10.1016/j.jlumin.2004.02.011
Publisher site
See Article on Publisher Site

Abstract

Absorption and fluorescence spectroscopic properties of 3-hydroxy-3-phenyl-1- o -carboxyphenyltriazene (HT) are studied. The mechanism of photo-induced electron transfer (PET) followed by energy transfer process of the ligand and the Cu (II), Ni (II) and Zn (II) metal complexes have been investigated. The excited state photo induced intramolecular hydrogen transfer from N–OH to triazene 1-nitrogen atom is explained. The effect of pH, solvent and concentration on the absorption and fluorescence of the ligand is studied and it has been found that the absorption and fluorescence of HT is highly pH, solvent and concentration dependent. Participation of the N–OH proton of HT in the solvent assisted O to N-proton transfer has also been proposed. The fluorescence band shift and changes in intensity is modulated by protonation and complexation with metal ions. This fluorophore can thus be used as a pH dependent and M ( n +1)+ /M n + redox on/off switchable molecular sensor.

Journal

Journal of LuminescenceElsevier

Published: Feb 1, 2005

References

  • Asian J. Chem
    Ressalan, S.; Chauhan, R.S.; Goswami, A.K.; Purohit, D.N.
  • Asian J. Chem
    Behrooz, R.; Ressalan, S.; Chauhan, R.S.; Goswami, A.K.; Purohit, D.N.
  • J. Chem. Phys
    Kuznetsov, A.M.; Ulstrup, J.

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