The interaction of fluorescent Pyronin Y molecules with monodisperse silver nanoparticles in chloroform

• The synthesis of monodisperse silver nanoparticles with 3 nm particle size.
• Pyronin Y dye molecules were interacted with Ag NPs in chloroform via sonication.
• The photophysical properties of PyY–Ag NPs system were spectroscopically explored.

The interaction of fluorescent Pyronin Y (PyY) molecules with monodisperse silver nanoparticles (Ag NPs) in chloroform was studied by using UV–Vis, steady-state and time-resolved fluorescence spectroscopies. Monodisperse Ag NPs were synthesized by using a surfactant assisted organic solution phase protocol comprising the tandem thermal decomposition and reduction of silver (I) acetate in oleic acid and oleylamine at 180 °C. The average particle size of Ag NPs was determined to be ∼3 nm by transmission electron microcopy (TEM) and their X-ray diffraction (XRD) pattern revealed the face centered cubic crystal phase. Afterward, PyY and monodisperse Ag NPs were interacted in chloroform via sonication at various time periods. The obtained spectroscopic results revealed that the photophysical properties of PyY molecules were dramatically changed after their interaction with Ag NPs in chloroform. It was determined that the amount of Ag NPs and PyY has the major effects on the photophysical properties of the dye.

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