Journals / Journal of the Turkish Chemical Society, Section A: Chemistry / 2019 / Cilt: 6 - Sayı: 3
Molecular Interaction Between Cationic Polymer Polyethyleneimine and Rose Bengal Dye: A Spectroscopic Study
- Pages
- 311–318
- DOI
- —
Abstract
The binding mechanism and polymer–fluorescence probe interactions betweenpolyethyleneimine (PEI) and Rose Bengal (RB) were investigated by using UV–Vis absorption, steady-stateand time-resolved fluorescence spectroscopy techniques. The spectroscopic data indicated that unusualinteractions and binding constant was calculated at 3.75 x 102 M-1 with high linearity for the PEI-RB system.The photophysical parameters of the dye, such as band shifts, fluorescence quantum yields, andfluorescence lifetimes, were determined. Non-radiative (knr) and radiative (kr) rate constants werecalculated and then compared.