Author/Authors :
Kakavand، Kiana نويسنده Department of Plant Sciences, School of Biology, University of Tehran, Tehran, 14155, I.R. Iran , , Niknam، Vahid نويسنده , , faridbod، Farnoush نويسنده university of Tehran,Center of excellence in electrochemistry , , Ebrahimzadeh، Hassan نويسنده Department of Plant Sciences, School of Biology, University of Tehran, Tehran, 14155, I.R.Iran , , Hamidipour، Assiyeh نويسنده Department of Plant Sciences, School of Biology, University of Tehran, Tehran, 14155, I.R.Iran ,
Abstract :
In this work, interaction study of metal ions with quercetin, the secondary
metabolite of plants was investigated by conductometric method and fluorescence
spectroscopy. The conductometric study was done in acetonitrile solution. The conductance
of the solution is measured after each addition of the quercetin to the cation solution. The
fluorescence spectrum of quercetin was recorded in presence and absence of metal ions at
maximum wave length (481 nm) upon excitation at 425 nm. Among the many cations titrated
with quercetin, Mg2+, Al3+, Pb2+ and Zn2+ enhanced the intrinsic fluorescence of the quercetin
while Cu2+, Ni2+ and Co2+ ions quench the intrinsic fluorescence emission of the quercetin
solution. These different phenomena are observed due to the different release of absorbed
energy in formed complex. The ability of quercetin molecule to form a complex with metal
ions may be has an effect in quercetin anti-oxidative properties.
