Photoionization of N-alkylphenothiazines in titanosilicate mesoporous TiSBA-15 molecular sieves
| Autor: | Jae Young Bae, Zhaohua Luan, Larry Kevan |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
chemistry.chemical_classification
Stereochemistry Radical chemistry.chemical_element General Chemistry Electron acceptor Condensed Matter Physics Molecular sieve law.invention Electron transfer chemistry Mechanics of Materials law Physical chemistry General Materials Science Mesoporous material Electron paramagnetic resonance Alkyl Titanium |
| Zdroj: | Microporous and Mesoporous Materials. 48:189-194 |
| ISSN: | 1387-1811 |
| DOI: | 10.1016/s1387-1811(01)00364-x |
| Popis: | N -alkylphenothiazines (PC n , where n =1, 6, 10, 16) have been incorporated into titanosilicate mesoporous TiSBA-15 molecular sieve and photoionized at room temperature to form stable alkylphenothiazine cation radicals (PC n + ), which are monitored by electron spin resonance spectroscopy. The results show that the photoyield and stability of PC n + radicals strongly depend on the titanium content in the TiSBA-15 framework, suggesting that framework Ti(IV) serves as an effective electron acceptor. The overall photoyield and stability of PC n + increase with increasing titanium content of 2–4% in TiSBA-15 and with increasing alkyl chain length of the alkylphenothiazine. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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