(Received: November 30, 2001; Accepted for publication: January 24, 2002; Published on Web: March 22, 2002)
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.
Keywords: Q-chanG4, emission, photoluminescence quenching, analyzer, polyethylene glycol, methylviologen, Ru(bpy)32+, solid
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