Anion-induced changes in the absorption and fluorescence properties of lumichrome

A new off-the-shelf fluorescent probe

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Remarkably, strong binding of lumichrome to fluoride and acetate anions has been found even in such a polar solvent as acetonitrile. Global analysis of the spectrophotometric titration data proved that both 1:1 and 1:2 lumichrome-anion complexes are formed. Interaction with the second anion in the ground state led to isoalloxazine-like absorption and fluorescence spectra because of the anion-promoted electron density redistribution in the heterocyclic rings. The lifetime and the quantum yield of the fluorescence for the excited 1:2 complex closely agreed with the value previously reported for lumiflavine, an analogous compound with isoalloxazine structure, providing further evidence for the anion-induced tautomerization. Effect of water on the complex formation was also revealed.

Original languageEnglish
Pages (from-to)238-242
Number of pages5
JournalChemical Physics Letters
Volume411
Issue number1-3
DOIs
Publication statusPublished - Aug 5 2005

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shelves
Fluorescent Dyes
Anions
Fluorescence
anions
fluorescence
probes
Quantum yield
Titration
Fluorides
titration
Ground state
acetonitrile
Carrier concentration
fluorides
acetates
Acetates
7,8-dimethylalloxazine
absorption spectra
life (durability)

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces
  • Condensed Matter Physics

Cite this

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title = "Anion-induced changes in the absorption and fluorescence properties of lumichrome: A new off-the-shelf fluorescent probe",
abstract = "Remarkably, strong binding of lumichrome to fluoride and acetate anions has been found even in such a polar solvent as acetonitrile. Global analysis of the spectrophotometric titration data proved that both 1:1 and 1:2 lumichrome-anion complexes are formed. Interaction with the second anion in the ground state led to isoalloxazine-like absorption and fluorescence spectra because of the anion-promoted electron density redistribution in the heterocyclic rings. The lifetime and the quantum yield of the fluorescence for the excited 1:2 complex closely agreed with the value previously reported for lumiflavine, an analogous compound with isoalloxazine structure, providing further evidence for the anion-induced tautomerization. Effect of water on the complex formation was also revealed.",
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AU - Biczók, L.

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N2 - Remarkably, strong binding of lumichrome to fluoride and acetate anions has been found even in such a polar solvent as acetonitrile. Global analysis of the spectrophotometric titration data proved that both 1:1 and 1:2 lumichrome-anion complexes are formed. Interaction with the second anion in the ground state led to isoalloxazine-like absorption and fluorescence spectra because of the anion-promoted electron density redistribution in the heterocyclic rings. The lifetime and the quantum yield of the fluorescence for the excited 1:2 complex closely agreed with the value previously reported for lumiflavine, an analogous compound with isoalloxazine structure, providing further evidence for the anion-induced tautomerization. Effect of water on the complex formation was also revealed.

AB - Remarkably, strong binding of lumichrome to fluoride and acetate anions has been found even in such a polar solvent as acetonitrile. Global analysis of the spectrophotometric titration data proved that both 1:1 and 1:2 lumichrome-anion complexes are formed. Interaction with the second anion in the ground state led to isoalloxazine-like absorption and fluorescence spectra because of the anion-promoted electron density redistribution in the heterocyclic rings. The lifetime and the quantum yield of the fluorescence for the excited 1:2 complex closely agreed with the value previously reported for lumiflavine, an analogous compound with isoalloxazine structure, providing further evidence for the anion-induced tautomerization. Effect of water on the complex formation was also revealed.

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JF - Chemical Physics Letters

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