Development of analyzer for photoluminescence quenching in a solid matrix

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Copyright 2002 Society of Computer Chemistry,Japan.This paper was published in "Sumio. Tokita, J.Comput. Chem. Jpn., 1(1), 37-46, 2002. The internet address of the above Journal is as follows: http://www.sccj.net/An analyzer called “Q-chanG4” was developed with Visual Basic for photoluminescence quenching in a　solid. This software can analyze the quenching mechanism in a solid matrix using emission decay curves and　Stern-Volmer plots. Photoluminescence quenching of Tris(2,2’-bipyridine)ruthenium(II) in a polyethylene　glycol solid by methylviologen was analyzed with Q-chanG4. The quenching mechanism was determined as　a combination of a dynamic quenching and a static quenching involving multi-step equilibria and dynamic　quenching. The dynamic quenching rate constant in the polyethylene glycol was as large as that in an aqueous　solution, suggesting that the diffusion coefficient of molecules in the polyethylene glycol is almost the same　as that in an aqueous solution in spite of the solid state.
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