By a News Reporter-Staff News Editor at Science Letter -- Fresh data on Styrenes are presented in a new report. According to news reporting originating from Seoul, South Korea, by NewsRx correspondents, research stated, "Luminescent porous polystyrene (PS) films containing pyrene and various amounts of perylene were prepared in humid atmosphere by solution casting technique for use as a plastic scintillator. The fluorescence spectra of doped PS films monitored at pyrene excitation show quenching of monomer fluorescence of pyrene with simultaneous sensitization of perylene monomer fluorescence appearing towards red."
Our news editors obtained a quote from the research from Konkuk University, "The observed enhancement in fluorescence of perylene was explained by considering excitation energy transfer (EET) from pyrene to perylene molecules accommodated in the pores generated during film formation. The fluorescence quenching data do not fit into the Stern-Volmer relation, but the sensitized fluorescence is fitted by an exponential growth equation, y=201860433.29 e(x/0.64366)+0.49262, with correlation coefficient R-2=0.997. The results on absorption and excitation spectroscopy indicated that the pyrene and perylene filled in pores of the PS films exist as isolated molecules. The porosity of the films was examined by atomic force microscopy (AFM) and scanning electron microscopy (SEM), showing randomly oriented holes, and their mean size and size distribution were found to be depending upon the dopant concentration. Pyrene and perylene doped porous PS films prepared by solution casting method in humid atmosphere showed highly intense blue perylene fluorescence by fluorescence resonance energy transfer (FRET) at pyrene excitation."
According to the news editors, the research concluded: "The SEM and AFM images revealed that nanosized pores are perylene concentration dependent, both pyrene and perylene held in the cavity of the pores in close proximal distance less than 10nm is required to cause efficient energy transfer between them."
For more information on this research see: Fluorescence enhancement effect in pyrene and perylene doped nanoporous polystyrene films: Mechanistic and morphology. Physica Status Solidi A-Applications and Materials Science, 2013;210(10):2121-2127. Physica Status Solidi A-Applications and Materials Science can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany (see also Styrenes).
The news editors report that additional information may be obtained by contacting N.K. Desai, Konkuk University, Bioorgan Res Center, Dept. of Anim Biotechnol, Seoul, South Korea. Additional authors for this research include M.K. Gupta, G.B. Kolekar and S.R. Patil.
Keywords for this news article include: Asia, Seoul, Nanoporous, South Korea, Polystyrenes, Nanotechnology, Benzene Derivatives, Benzylidene Compounds, Emerging Technologies
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