ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Investigation of photophysical and binding properties of Rose Bengal dye on graphene oxide and polyethyleneimine-functionalized graphene oxide nanocomposites

Tuğba Bayraktutan

Department of Biochemistry, Faculty of Arts and Science, Iğdır University, Iğdır, Turkey

E-mail: tugba.bayraktutan@igdir.edu.tr

Received: 17 September 2019  Accepted: 6 March 2020

Abstract:

Herein, the photophysical properties and interactions of Rose Bengal are examined using UV–Vis absorption techniques and fluorescence spectroscopy under two different reaction conditions, namely in the COOH-rich graphene oxide and in polyethyleneimine with graphene oxide (PEI–GO) nanocomposite dispersion solutions. The PEI–GO nanocomposite had a positively charged surface area containing a ‒CONH functional group which had been modified by covalent bonds. The molecular interactions of the dye compound in these media were found to be different.

Graphic abstract

Keywords: Rose bengal dye; Fluorescence and absorption spectroscopy; Graphene oxide; Polyethyleneimine-functionalized graphene oxide

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-020-01130-4

Chemical Papers 74 (9) 3017–3024 (2020)