Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 15: Poster: Membranes, Biomaterials, Biopolymers

CPP 15.1: Poster

Montag, 20. März 2017, 18:30–21:00, P1C

The fluorescence activity of nano-confined dyes — Khalil Alizadeh², Seyyed Mahdi Shavakandi², Soheil Sharifi², Othmar Marti¹, and •Masoud Amirkhani¹ — ¹Universität Ulm Albert-Einstein-Allee 11, 89081 Ulm, Germany — ²Department of Physics, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad 91775-1436

Dyes molecules are widely used for imaging, lasing and coloring application thus increasing the photostability and decreasing the quenching rate are very crucial. One way to deal with mentioned problems is embedding dye molecules in the environment, which increase thermal diffusion and also hinder the aggregation. A two-phase medium such as emulsion is an ideal system due to their ability to enhance the solubility and also decrease the dimerization of dye molecules. In this study two Xanthene type dyes ( Rhodamine B and Fluorescein sodium salt) are dissolved in a water-in-oil microemulsion. The optical activity of both dyes were examined using their fluorescence and absorption spectrum. Rhodamine B (RhB) florescence activity enhanced in microemulsion solution compare that of in water solution, which can be attributed to a decrease in dimerization. The opposite trend was observed for Fluorescein sodium salt, the difference between the behavior of RhB and FSS is linked to their solubility in water. We additionally, used Lippert-Mataga equation to calculate the change of dipole moments in the ground and exacted states.