Tomi Nath Das

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Pulse radiolytic generation of monomeric and dimeric cations of benzene, toluene, and naphthalene in aqueous acid media at room temperature and their spectrophotometric characterization is discussed. Results presented include measurements of each aromatic's solubility in H(2)O-H(2)SO(4) and H(2)O-HClO(4) media over the acidity range pH 1 to H(0) -7.0,(More)
Atmospheric-pressure dielectric-barrier discharge (DBD) assisted control of benzene((g)) oxidation into different classes of products is presented in this study. The gas-phase products were directly analyzed online by GC-FID and GC-MS. In addition, a solid yellowish surface deposit also formed, which was dissolved in 10 mL ethanol after each 10 min DBD(More)
The significant presence of septum-related ghost peaks, causing interference in routine gas chromatography-mass spectrometry analyses at sample injection port temperatures above 100°C, is demonstrated. A comparative study with commonly employed septa of various types and makes under varying analytical conditions, e.g., injection port temperature, carrier(More)
Reactions of semi-oxidized radicals derived from 3,5-diiodotyrosine (I2TyOH, a thyroid hormone precursor) have been studied using radiation chemical techniques. In buffered, aqueous medium at room temperature, molecular oxygen reactivity towards the phenoxyl radical (I2TyO.) is low, the average bimolecular rate constant, k being 1.7 +/- 0.22 x 10(6) dm3(More)
Efficient transformation of cyclohexane<i>g</i> to methane, ethylene, and acetylene in argon dielectric barrier discharge is reported. In the absence of another H-atom donating source in the reaction mixture, such products' generation suggests in situ fragmentation of a fraction of parent molecules to C<sub>1</sub> and C<sub>2</sub> stages, followed by(More)
A first-time account of direct, on-line, instantaneous and efficient chemical conversion of gas phase benzene to methane in argon Dielectric Barrier Discharge (DBD) is presented. In the absence of another overt hydrogen-donating source, potency of analogous parents toward methane generation is found to follow the order: benzene>toluene>p-xylene.(More)
Aqueous sulfuric acid containing up to approximately 14 M acid (H0 > or = -7.0) was used as solvent in pulse radiolytic redox studies to characterize cationic transients of phenol (C6H5OH) and map their reactions. The primary radical yields were first measured to correlate the variation in various radical concentrations as a function of increasing acid(More)
Chemical transformations of moist nitrogen in dielectric barrier discharge cold plasma into NO, NO<sub>2</sub>, and NO<sub>2</sub><sup>&#x2212;</sup> in conjunction with the control for exclusive NO generation are reported. Initial gas-phase products NO and NO<sub>2</sub> were identified and estimated spectrophotometrically at respective absorption(More)
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