نرگس رسولي

In this study, the photoluminescence technique was employed to develop a precise an‎d sensitive method for determining the unknown concentration of Rhodamine B. Owing to its high quantum efficiency, good photostability, an‎d emission in the visible region, Rhodamine B has found extensive applications in optical systems an‎d fluorescencebased sensors. In this work, Rhodamine B solutions in ethanol were prepared at various concentrations, an‎d their absorption an‎d emission spectra were measured using a CCD camera an‎d a spectrometer. Calibration curves were constructed, an‎d an exponential nonlinear fitting was applied to the data to determine the sensitivity an‎d correlation coefficient of the method. The results indicated that variations in the solvent environment an‎d concentration can lead to spectral shifts an‎d a decrease in emission intensity. The obtained data not only provide a deeper understan‎ding of the optical behavior of Rhodamine B but also serve as a foundation for designing rapid, low-cost, an‎d accurate analytical methods for monitoring dye compounds an‎d developing optical sensors.

ﻓﻮﺗﻮﻟﻮﻣﯿﻨﺴﺎﻧﺲ , ﻓﻠﻮﺭﺳﺎﻧﺲ , ﺭﻭﺩﺍﻣﯿﻦ B , طيف‌سنجي , ﺟﺬﺏ ﻭ ﻧﺸﺮ

Photoluminescence , Fluorescence , Rhodamine B , Spectroscopy , Absorption an‎d Emission

Narges Rasouli

Dr. Mohammad Hosein Mahdieh /Dr. Mahdi Shayganmanesh