trans-Stilbene Incorporation in Acidic Medium-Pore ZSM-5 Zeolite: A Pulsed EPR Study

• Published in: Chemphyschem Vol. 7; no. 12; pp. 2474 - 2477
• Main Authors: Vezin, Hervé, Moissette, Alain, Hureau, Matthieu, Brémard, Claude
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 11.12.2006; WILEY‐VCH Verlag; Wiley; Wiley-VCH Verlag
• Subjects: Chemistry; Colloidal state and disperse state; Electron Spin Resonance Spectroscopy - methods; electron-hole pairs; EPR spectroscopy; Exact sciences and technology; General and physical chemistry; Hydrogen-Ion Concentration; Ion-exchange; Porosity; Porous materials; radical ions; Sensitivity and Specificity; Stereoisomerism; Stilbenes - chemistry; Surface physical chemistry; trans-stilbene; zeolites; Zeolites - chemistry; Zeolites: preparations and properties; Incorporation; Hydrocarbon; radical ions; EPR spectrometry; electron-hole pairs; Electron transfer; Ions; Porous material; Radical; Molecular sieve; Trapping; zeolites; Pore; Benzenic compound; trans-stilbene; Ethylenic compound; EPR spectroscopy; Electrons; Stilbene
• ISSN: 1439-4235; 1439-7641
• DOI: 10.1002/cphc.200600279

Entrapped radicals: trans‐Stilbene (C6H5CHCHC6H5, t‐St) entrapment in medium‐pore acidic HnZSM‐5 zeolites induces t‐St ionization and subsequent electron transfer. The aluminium‐rich ZSM‐5 participates both as electron acceptor and donor to the unusual stabilization of the t‐St@HnZSM‐5.+.− electron–hole pair. Pulsed electron paramagnetic resonance (EPR; see picture) spectroscopy provides a realistic picture of the chemical environments of the unpaired electrons.