Aromatic Monoazines as Fluorescent Sensors for Photoacid Generation in Thin Polymer Films
| Autor: | G. Pohlers, R. Sinta, J. C. Scaiano, Susan Virdee |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
chemistry.chemical_classification
Materials science General Chemical Engineering Analytical chemistry Quantum yield Protonation General Chemistry Polymer Photochemistry Fluorescence Fluorescence spectroscopy chemistry.chemical_compound chemistry Bathochromic shift Materials Chemistry Methyl methacrylate Thin film |
| Zdroj: | Chemistry of Materials. 8:2654-2658 |
| ISSN: | 1520-5002 0897-4756 |
| DOI: | 10.1021/cm960186u |
| Popis: | This paper reports a novel approach to monitor photoinduced acid generation in polymer films of the type used in microlithography. We have employed fluorescent acid-sensitive sensors to monitor the progress of photoacid generation in solution and in thin polymer films. We have studied the effect of p-toluenesulfonic acid on the spectral properties of 2-phenylpyridine, 2-phenylquinoline, and acridine in diglyme solution and in poly(methyl methacrylate) (PMMA) films using absorption and fluorescence spectroscopy. In both cases a bathochromic spectral shift and an increase in fluorescence quantum yield are observed upon protonation. In samples containing a photoacid generator, the acid production upon irradiation could be monitored by observing the increase in fluorescence intensity with proceeding irradiation time in both solution and PMMA films. This new acid-monitoring method may find application in the study of diffusional processes in polymer films. |
| Databáze: | OpenAIRE |
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