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1,4-bis-(3-hydroxy-4-oxo-4H-chromen-2-yl)-benzene (bis-flavonol): synthesis, spectral properties and principle possibility of the excited state double proton transfer reaction

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Svechkarev D., Doroshenko A., Kolodezny D.

Open Chemistry

2012

vol. 10

issue 1

205-215

Synthesis and systematic investigation of the spectral-luminescent properties of “bis-flavonol” {1,4-bis-(3-hydroxy-4-oxo-4H-chromen-2-yl)-benzene} were performed. Hypothetical possibility for the double excited-state proton transfer reaction in bis-flavonol is discussed based on both quantum-chemical modeling and experimental data. Consecutive S1*-state transfer of the two protons of the title molecule is shown to be energetically unfavorable, however, still preserving a possibility for the concerted double proton transfer in the excited dienol form.

Facile ultrasensitive monitoring of mercury ions in water by fluorescent ratiometric detection

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Dereka B., Svechkarev D., Doroshenko A.

Open Chemistry

2013

vol. 11

issue 4

584-593

Prospects for analytical application of 2,5-diphenyloxazole-substituted 3-hydroxychromone for detection of mercury ions are presented. Sensitivity and selectivity for a number of metal ions both in methanol solution and in the plasticized polymer are outlined. Ultrasensitive and highly selective fluorescent ratiometric response of the polymer film containing the title compound for mercury ions in water media is revealed. Reversibility of ratiometric response to mercury ions and influence of plasticizer’s content in the polymer film on the optical feedback are also discussed. [...]

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2 Open Chemistry

1 2013

1 2012

2 Doroshenko A.

2 Svechkarev D.

1 Dereka B.

1 Kolodezny D.

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1,4-bis-(3-hydroxy-4-oxo-4H-chromen-2-yl)-benzene (bis-flavonol): synthesis, spectral properties and principle possibility of the excited state double proton transfer reaction

Facile ultrasensitive monitoring of mercury ions in water by fluorescent ratiometric detection