A Fluorescence Quenching Study of Naphthalimide Dye by Graphene: Mechanism and Thermodynamic Properties

Abstract

Graphene oxide is an efficient fluorescence quencher for various organic dyes. Herein the fluorescence quenching of graphene oxide has been carried out on a naphthalimide dye as a fluorescent probe model. The interaction between naphthalimide dye and graphene oxide was studied by UV-Vis and fluorescence spectroscopic techniques. The results indicated that graphene is a very efficient quencher for naphthalimide molecule. The Stern-Volmer analysis revealed that the remarkable quenching of graphene was based on a combined static and dynamic quenching mechanism and went through an energy transfer process. Graphical Abstract ᅟ.

Naphthalimide-based optical turn-on sensor for monosaccharide recognition using boronic acid receptor

“…[19][20][21][22][23][24] The synthesis and application of various types of naphthalimide dyes in different optical and electrochemical sensors had already been undertaken by our team. [25][26][27][28][29] In designing a uorescent probe to detect saccharides, there is an important challenge which is related to minor uorescence variations when attached with diols like sugars. In order to overcome this problem, a system should be designed in which the primary uorescence emission of the dye is very low, and when the diol is attached, changes in uorescence emission differ from optical sensors identied for saccharide detection.…”

Tracking the concentration of Al3+ in the aqueous system up to the nanomolar range using a modified biopolymer chitosan based fluorophore

“…The Stern–Volmer quenching constant ( K SV ) depends on the temperature which indicates that the quenching of the fluorophore involves the thermodynamic process. 27 The binding of the quencher (Al 3+ ion) to the fluorophore (β-NAC) can be evaluated from thermodynamic parameters, namely, enthalpy (Δ H ), entropy (Δ S ) and Gibbs free energy (Δ G ), for which binding studies were carried out at four different temperatures (298, 305, 312 and 319 K). Δ H and Δ S can be determined by Van’t Hoff equationwhere K is the effective quenching constant.…”

Synthesis, Solvatochromism and Fluorescence Quenching Studies of Naphthalene Diimide Dye by Nano graphene oxide

“…The design and development of novel platforms based on graphene as the energy acceptor have been a remarkable success in recent years. Our team is developing the design and application of fluorochrome dyes for probe applications [19][20][21][22]. Recently we worked on the effect of graphene oxide as a quencher on the different naphthalimide derivatives.…”