FLUORESCENCE QUENCHING OF DYES WITH GRAPHENE OXIDE
Abstract
Fluorescence quenching of four dyes (acridine orange (AO), rhodamine B (Rd B), rhodamine 110 (Rd 110), and rhodamine 640 (Rd 640)) by colloidal graphene oxide (GO) was investigated in phosphate buffer solution (pH 6.0). Dynamic and static quenching processes were analyzed with the use of the Stern-Volmer equation. From the studied dyes, static quenching by graphene oxide was observed in AO, Rd 640, and Rd B, while mixed dynamic and static quenching was characteristic for the Rd 110 compound. The Stern-Volmer constant of dynamic quenching is ten times smaller than for the static quenching. The association constants of the dyes with GO are located in the series 2540 (АO) > 495 (Rd640) > 260 (Rd110) > 144 l/g(RdB). The value of the π-π stacking interaction is strongly influenced by the phthalic fragment oriented perpendicular to the xanthene in rhodamine dyes, as well as by four alkyl groups in Rd B due to their torsional oscillations and rotational motions.
About the Authors
V. A. Povedailo
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Russian Federation
Russian Federation
B. V. Ronishenko
Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus
Russian Federation
Russian Federation
V. I. Stepuro
Yanka Kupala State University of Grodno
Russian Federation
Russian Federation
D. A. Tsybulsky
Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus
Russian Federation
Russian Federation
V. V. Shmanai
Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus
Russian Federation
Russian Federation
D. L. Yakovlev
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Russian Federation
Russian Federation
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Review
For citations:
Povedailo V.A., Ronishenko B.V., Stepuro V.I., Tsybulsky D.A., Shmanai V.V., Yakovlev D.L. FLUORESCENCE QUENCHING OF DYES WITH GRAPHENE OXIDE. Zhurnal Prikladnoii Spektroskopii. 2018;85(4):550-556. (In Russ.)
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