Ground and excited-state interactions of coumarin and nucleotide base

Ground and excited-state interactions of coumarin and nucleotide base

Steady-state and time-resolved fluorescence measurements for a series of bichromophoric compounds containing 7-methoxy-coumarin and nucleotide base residues have been performed in water and in organic solvents. The data from these studies have been used to calculate the relative proportion of folded...

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Veröffentlicht in:Canadian journal of chemistry 1988-03, Vol.66 (3), p.513-516
Hauptverfasser: Wenska, Grażyna, Paszyc, Stefan
Format: Artikel
Sprache:eng
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Atomic and molecular physics
Exact sciences and technology
Fluorescence and phosphorescence
radiationless transitions, quenching (intersystem crossing, internal conversion)
Molecular properties and interactions with photons
Physics
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container_title Canadian journal of chemistry
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creator Wenska, Grażyna
Paszyc, Stefan
description Steady-state and time-resolved fluorescence measurements for a series of bichromophoric compounds containing 7-methoxy-coumarin and nucleotide base residues have been performed in water and in organic solvents. The data from these studies have been used to calculate the relative proportion of folded and extended conformations of bichromophores. Ground-state stacking interactions of coumarin and nucleotide base have been found to be limited to aqueous solution. The contribution of the dynamic quenching mechanism to the total fluorescence quenching in water has been estimated. The absence of dynamic quenching in organic solvents is.explained on the basis of the very short lifetime of the fluorophore in methanol.
doi_str_mv 10.1139/v88-087
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source NRC Research Press; EZB-FREE-00999 freely available EZB journals; Free Full-Text Journals in Chemistry
subjects Atomic and molecular physics
Exact sciences and technology
Fluorescence and phosphorescence
radiationless transitions, quenching (intersystem crossing, internal conversion)
Molecular properties and interactions with photons
Physics
title Ground and excited-state interactions of coumarin and nucleotide base
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