Extended Diaryl Diselenide Radical Cations in Pentasil Zeolite Studied by EPR and Diffuse Reflectance Optical Spectroscopy

Extended Diaryl Diselenide Radical Cations in Pentasil Zeolite Studied by EPR and Diffuse Reflectance Optical Spectroscopy

Incorporation of diaryl diselenides (1a, b; R = H, Cl) into pentasil zeolite generated “extended” selenium-centered radical cations (1a •+, b •+). These species are identified by their EPR (g avg = 2.0644, 2.0639) and diffuse reflectance spectra (λmax = 520, 550, 950 nm). The relative strength of th...

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Veröffentlicht in:The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 1999-09, Vol.103 (37), p.7381-7384
Hauptverfasser: Lakkaraju, Prasad S, Shen, Kui, Roth, Heinz D, García, Hermenegildo
Format: Artikel
Sprache:eng
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Zusammenfassung:Incorporation of diaryl diselenides (1a, b; R = H, Cl) into pentasil zeolite generated “extended” selenium-centered radical cations (1a •+, b •+). These species are identified by their EPR (g avg = 2.0644, 2.0639) and diffuse reflectance spectra (λmax = 520, 550, 950 nm). The relative strength of the two-center three-electron Se−Se bond is compared with the corresponding S−S bond in diphenyl disulfide radical cation.
ISSN:1089-5639
1520-5215
DOI:10.1021/jp991571k