Spectroscopic properties of different concentration xanthene›s dye mixture (6G, 3GO, B and C) solution in chloroform

Abstract

Abstract In this research the absorption and fluorescence spectrum in the range (400-700) nm for (Rhodamine 6G, Rhodamine 3GO, Rhodamine B and Rhodamine C) mixture which belong to Xanthene family were studied in the ratio (1:1:1:1), it has dissolved in chloroform to prepare different concentration (5*10-6, 1*10-5, 3*10-5, 5*10-5, 7*10-5, and 1*10-4) mole/L at room temperature. We notice that the absorption intensity, bandwidth of absorption spectrum and stock shift are increased with increasing concentration, and this agree with Beer-Lambert law. The quantum efficiency of the dissolved Rhodamine mixture in chloroform has been calculated by using the same above concentration and their results are as follows (70%, 71%, 94%, 76%, 68% and 58%) respectively. The radiative life time have been computed as given (0. 08, 0. 18, 0. 65, 0. 99, 1. 25, and 1. 44) nanosecond respectively. Fluorescent life time have been also computed as given (0. 05, 0. 12, 0. 61, 0. 75, 0. 86 and 0. 84) nanosecond respectively.