Purine Scaffold Effect on Fluorescence Properties of Purine-Hydroxyquinolinone Bisheterocycles |
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Authors: | Kamil Motyka Barbora Vaňková Jan Hlavá? Miroslav Soural Petr Funk |
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Institution: | 1.Department of Organic Chemistry, Faculty of Science, Institute of Molecular and Translational Medicine,Palacky University,Olomouc,Czech Republic |
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Abstract: | The fluorescence properties of bisheterocyclic compounds that contain purine and the 3-hydroxyquinolin-4(1H)-one skeleton connected with an aliphatic spacer of a different length/structure (3HQP) were examined. It was found that
the introducing of the spacer-purine scaffold led in the comparison to 3HQs themselves to (1) the possibility of the effectual
excitation in the wider range of excitation wavelengths, moreover, some derivatives can be excited at relatively high wavelengths
around 400 nm, (2) the lowering of the quantum yield and (3) the slight longer wavelength shift of the dual emission spectra.
Tested organic solvents did not affect significantly the 3HQP fluorescence properties. The characters of emission spectra
as well as the quantum yields of 3HQPs were notably influenced by the ratio of water and DMSO in their composed mixture applied
as a solvent. With increasing water content in the mixture both I1/I2 and the quantum yield decreased. |
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