Photoluminescence Properties of Graphene Oxide in Non-Aqueous Solvents.

Abstract

Detailed attention to the study of interaction between graphene oxide (GO) and various different organic fluorophores have been documented in literature as a result of which the impact of GO on the photophysical properties of the fluorophores is well known to the scientific community. However, the photoluminescence (PL) properties of GO in polar aprotic solvents is yet to be established. In this article we report the PL properties of GO in various polar aprotic solvents using various spectroscopic techniques. n-π* transition due to the C=O bonds in the sp3 hybrid regions and π-π* transition due to C=C bonds is the sp2 hybrid are prominent in GO. The presence of quasi-molecules within sp2-sp3 domains which acts as PL centres, and located in the sp3 matrixes of GO are responsible for the PL properties. The present article implies the presence of multiple emissive states of GO in polar aprotic solvents and conveys the fact that the PL properties of GO are very much wavelength dependent.