Effect of Concentration on Absorption and Fluorescence for Eosin y in Methanol

Abstract

In the present work, Studying effect of concentration on the absorption and
fluorescence spectra of eosin y in methanol in different concentration like 1x10-
2
, 0.5 x10-2
,…. , 1x10-5 mol/liter, and afterward measure the absorptions spectra
to this concentration like (abs.=521nm) for concentration (1x10-5 M) and (513
nm) for concentration (1x10-4 M) and also measure the fluorescence spectra
like (582 nm) , (573 nm) ( 560 nm) (550nm), and also measure some
photophysical parameters such as molar coefficient and oscillator strength and
fluorescence coefficient , after that obtain increasing to the fluo. for different
concentration and measure the abs. , by uv –vis Absorption and fluo. measure
by using fluorometer spectropoto.