Absorption and emission spectra and triplet decay of some aromatic and N-heterocyclic compounds in polymethylmethacrylate
- 1 January 1970
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Transactions of the Faraday Society
- Vol. 66, 2135-2147
- https://doi.org/10.1039/tf9706602135
Abstract
Polymethylmethacrylate (PMMA) is a convenient solvent for studies of the fluorescence, phosphorescence, and triplet-triplet absorption of a number of aromatic hydrocarbons and N-heterocyclic compounds. Theoretical assignments of some triplet states are discussed briefly. Triplet lifetimes of the solutes have been determined at 77 and 293 K by phosphorescence decay measurements and by kinetic spectrophotometry. Non-exponential decays of compounds with triplet lifetimes less than 0.1 s at 293 K have been attributed to diffusion-controlled quenching reactions occurring in low viscosity regions in the polymer.Keywords
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