Role of Sulfide Radical Cations in Electron Transfer Promoted Molecular Oxygenations at Sulfur
作者:Edward L. Clennan、Chen Liao
DOI:10.1021/ja710301s
日期:2008.3.1
participation of singletoxygen. This argues for different reaction mechanisms for all three sensitizers. However, both the quinolinium and pyrylium-cation-sensitized reactions display all of the characteristics of electron-transfer-initiated photooxygenations. Both sensitizers were quenched at nearly diffusion-limited rates by 1 and 2. Laser flash photolysis of mixtures of either sensitizer and 1 or 2 resulted
Conformationally Induced Electrostatic Stabilization of Persulfoxides: A New Suggestion for Inhibition of Physical Quenching of Singlet Oxygen by Remote Functional Groups
作者:Edward L. Clennan、Sean E. Hightower、Alexander Greer
DOI:10.1021/ja0525509
日期:2005.8.24
1,5-Dithiacyclooctane is shown to chemically react more efficiently and to remove singletoxygen from solution more rapidly than either thiane or 1,4-dithiane. These unusual characteristics of the 1,5-dithiacyclooctane reaction were explored using ab initio quantum chemical methods. A large number of persulfoxides, thiadioxiranes, and hydroperoxy sulfonium ylides were located and their structures analyzed
Spontaneous oxidation of a sulfide in zeolite CaY: the unprecedented reaction of a sulfide radical cation with oxygen
作者:Wenhui Zhou、Edward L. Clennan
DOI:10.1039/a906052i
日期:——
Addition of 1,5-dithiacyclooctane (1,5-DTCO) to CaY resulted in electron transfer formation of the corresponding radical cation, which was characterized by EPR and diffuse reflectance UV–VIS spectrometry and which undergoes an unprecedented reaction with molecular oxygen to give mono- and bis-sulfoxide products.