| Autor: |
Klymchenko AS; Research Institute for Genetic Engineering and Biotechnology, TUBITAK Marmara Research Center, Gebze-Kocaeli 41470, Turkey., Pivovarenko VG, Demchenko AP |
| Jazyk: |
angličtina |
| Zdroj: |
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2003 Mar 01; Vol. 59 (4), pp. 787-92. |
| DOI: |
10.1016/s1386-1425(02)00233-0 |
| Abstrakt: |
In order to understand the unexpectedly low quantum yields of 3-hydroxyflavones (3-HFs) in certain solvents, such as acetonitrile or ethyl acetate, the comparative study of solvent-dependent properties of parent 3-HF, 2-furyl-3-hydroxychromone and 2-benzofuryl-3-hydroxychromone derivatives have been performed. The results suggest that the formation of intermolecular hydrogen bond of 3-hydroxy group with the solvent favors non-planar conformations of phenyl group with respect to chromone system. This steric hindrance is not observed in the case of furan- and benzofuran-substituted 3-hydroxychromones (3-HCs). These results suggesting a new strategy for dramatic improvement of fluorescence properties of 3-HCs as two-wavelength ratiometric fluorescence probes. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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