424. "Direct Liquid-Phase Sulfonation of Methane to Methanesulfonic Acid by SO3 in the Presence of a Metal Peroxide" (with Sudip Mukhopadhyay) Angew. Chem. 115, 1049-1051 (2003).
426. "Direct Sulfonation of Methane to Methanesulfonic Acid with SO2 Using Ca Salts as Promoters" (with Sudip Mukhopadhyay) J. Am. Chem. Soc. 125, 4406-4407 (2003).
427. "Biasing a Transition State Search to Locate Multiple Reaction Pathways" (with Baron Peters, WanZhen Liang, and Arup Chakraborty) J. Chem. Phys. 118, 9533-9541 (2003).
428. "Direct Sulfonation of Methane at Low Pressure to Methanesulfonic Acid in the Presence of Potassium Peroxydiphosphate as the Initiator" (with Sudip Mukhopadhyay) Org. Proc. Res. Dev. 7, 161-163 (2003).
429. "Direct Catalytic Sulfonation of Methane with SO2 to Methanesulfonic Acid (MSA) in the Presence of Molecular O2" (with Sudip Mukhopadhyay) Chem. Comm., 13, 1590-1591 (2003).
430. "A High-Yield Approach to the Sulfonation of Methane to Methanesulfonic Acid Initiated by H2O2 and a Metal Chloride" (with Sudip Mukhopadhyay) Angew. Chem. Int. Ed., 42, 2990-2993 (2003).
431. "Improved Fermi Operator Expansion Methods for Fast Electronic Structure Calculations" (with WanZhen Liang, Chandra Saravanan, Yihan Shao, Roi Baer, and Martin Head-Gordon) Am. Inst. Phys., 118, 4117-4125 (2003).
432. "A Novel Method for the Direct Sulfonation of CH4 with SO3 in the Presence of KO2 and a Promoter" (with Sudip Mukhopadhyay) Org. Proc. Res. Dev., 7, 754-757 (2003).
433. "Density Functional Theory Study of Benzene Oxidation Over Fe-ZSM-5 (with Jason A. Ryder and Arup K. Chakraborty) J. Catal., 220, 84-91 (2003).
434. "Synthesis of Mixed Anhydrides from Methane and Carbon Dioxide in Acid Solvents" (with Mark Zerella and Sudip Mukhopadhyay) Org. Lett., 5, 3193-3196 (2003).
435. "Effects of O2 Concentration on the Rate and Selectivity in Oxidative Dehydrogenation of Ethane Catalyzed by Vanadium Oxide: Implication for O2 Staging and Membrane Reactors" (with Toshio Waku, Morris Argyle, and Enrique Iglesia) Ind. Eng. Chem. Res., 42, 5462-5466 (2003).
436. "X-ray Absorption Fine Structure Characterization of the Local Structure of Fe in Fe-ZSM-5" (with Sun Hee Choi, Benjamin Wood, and Jason A. Ryder) J. Phys. Chem. B, 107, 11843-11851 (2003).
437. "In Situ UV-Visible Assessment of Extent of Reduction During Oxidation Reactions on Oxide Catalysts" (with Morris D. Argyle, Kaidong Chen, Carlo Resini, Catherine Krebs, and Enrique Iglesia) Chem. Comm., 2082-2083 (2003).
