Insights into the coordination mode of quercetin with the Al(III) ion from a combined experimental and theoretical study

Combining potentiometric, spectroscopic and theoretical DFT computations we have studied the formation of the Al(III)-quercetin complex in ethanol solution. The possible complexation sites have been considered on the basis of all the experimental and theoretical tools used. Results supported proposing a 1:1 neutral complex and the possibility to have different isomers in solution.