Abstract
Abstract The phosphorescence spectra and lifetimes of ionic organic compounds, such as 4-hydroxy-3-methoxybenzaldehyde, 2-amino-1-naphthalene sulfonic acid, and 9-anthracenemethanol, adsorbed on filter paper were measured as a function of the substrate temperature (T) in the range of 93 – 373 K and the preparation concentration (c) of the solutions. The molecule-substrate interaction leading to room temperature phosphorescence is discussed on the basis of the experimental data.
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