Search Results - "Schepp, Norman P."

Influence of the Alkali Metal Cation on the Distance of Electron Migration in Zeolite Y:  A Nanosecond Laser Photolysis Study by Keirstead, Amy E, Schepp, Norman P, Cozens, Frances L

“…Zeolites have been identified as promising solid-state host materials for the design of alternative energy systems due to their ability to promote long-lived…”
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Picosecond Dynamics of Nonthermalized Excited States in Tris(2,2-bipyridine)ruthenium(II) Derivatives Elucidated by High Energy Excitation by McFarland, Sherri A, Lee, Felix S, Cheng, Karen A. W. Y, Cozens, Frances L, Schepp, Norman P

“…The picosecond excited-state dynamics of several derivatives have been investigated using high photon energy excitation combined with picosecond luminescence…”
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Radical and Radical Ion Reactivity in Nucleic Acid Chemistry by Schepp, Norman P

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Generation and Direct Observation of the 9-Fluorenyl Cation in Non-acidic Zeolites by O'Neill, Melanie A, Cozens, Frances L, Schepp, Norman P

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Absolute Reactivity of Halo(pyridyl)carbenes by Moya-Barrios, Reinaldo, Cozens, Frances L, Schepp, Norman P

“…A comprehensive series of halo(pyridyl)carbenes was generated by laser flash photolysis of the appropriate diazirines. Only the chloro- and…”
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Direct Observation of the Benzyl Radical and the Benzyl Anion within Cation-Exchanged Zeolites. A Nanosecond Laser Study by Cozens, Frances L, Ortiz, Wendy, Schepp, Norman P

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Alkali Metal Cation Control of Oxidation Reactions of Radicals in Zeolites by Cozens, Frances L, Cano, Maria Luz, García, Hermenegildo, Schepp, Norman P

“…The dynamics of the xanthyl radical in a series of alkali-metal cation exchanged (Li+, Na+, K+, Rb+, and Cs+) Y faujasites in the absence and presence of…”
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Generation and Absolute Reactivity of an Aryl Enol Radical Cation in Solution by Schepp, Norman P

“…Laser flash photolysis of 1-bromo-1-(4-methoxyphenyl)acetone in acetonitrile leads to the formation of the α-acyl 4-methoxybenzyl radical that under acidic…”
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The reactivity of diarylmethyl carbocations within non-protic zeolites by Hallett-Tapley, Geniece L, Schepp, Norman P, Cozens, Frances L

“…The generation of diarylmethyl carbocations within non-protic zeolites (LiY, NaY, KY, RbY, CsY, and NaX) was carried out via laser excitation (266 nm or 266 nm…”
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Substituent and Solvent Effects on the β-Heterolysis Reaction of β-Hydroxy Arylethyl Radicals by Cozens, Frances L, Lancelot, Sandy F, Schepp, Norman P

“…Time-resolved conversion of a series of β-hydroxy arylethyl radicals with electron-donating and -withdrawing aromatic substituents to their corresponding…”
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Absolute reactivity of arylallyl carbocations by Hallett-Tapley, Geniece, Cozens, Frances L., Schepp, Norman P.

“…A series of α‐vinyl arylmethyl cations were generated and studied using nanosecond laser flash photolysis. Rate constants for the decay of the substituted…”
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Solvation Control of Chemoselectivity in Reactions of Radical Cations by Workentin, Mark S, Schepp, Norman P, Johnston, Linda J, Wayner, Danial D. M

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Reactivity of 4-vinylphenol radical cations in solution: implications for the biosynthesis of lignans by Rodríguez-Evora, Yan, Schepp, Norman P

“…Nanosecond laser flash photolysis studies of the radical cation of 4-hydroxy-3-methoxystyrene show that the radical cation reacts with neutral…”
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Reactivity of Radical Cations. Effect of Radical Cation and Alkene Structure on the Absolute Rate Constants of Radical Cation Mediated Cycloaddition Reactions1 by Schepp, Norman P, Johnston, Linda J

“…Absolute rate constants for the reactions of styrene, 4-methylstyrene, 4-methoxystyrene, and β-methyl-4-methoxystyrene radical cations with a series of…”
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Photogeneration and Migration of Electrons and Holes in Zeolite NaY by O'Neill, Melanie A, Cozens, Frances L, Schepp, Norman P

“…Electron transfer and charge migration between electron donors and acceptors encapsulated within dry NaY zeolites are explored using nanosecond laser flash…”
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Ultrafast Dynamics of Pyrene Excimer Formation in Y Zeolites by Cheng, Karen A. W. Y, Schepp, Norman P, Cozens, Frances L

“…Pyrene excimer emission in alkali-metal-exchanged zeolites is readily observed to grow in using an ultrafast streak camera with 3.3 ps time-resolution…”
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Nonthermalized excited states in Ru(II) polypyridyl complexes probed by ultrafast transient absorption spectroscopy with high photon energy excitation by McFarland, Sherri A, Cheng, Karen AWY, Lee, Felix S, Cozens, Frances L, Schepp, Norman P

“…The picosecond excited state dynamics of a series of homoleptic Ru(II) polypyridyl complexes (where LL = bpy, dmb, dmeob, dfmb, or dttb) have been investigated…”
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Resolution of Ultrafast Pyrene Excimer Emission Rise Times in Zeolites X and Y by Cheng, Karen A. W Y., Schepp, Norman P., Cozens, Frances L.

“…Pyrene has been a favorite photophysical probe molecule for zeolite research because of its ability to exhibit both monomer and excimer emission upon…”
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Comparison of Activation Parameters for Ionization Reactions within Zeolites and in Aqueous Solution by Schepp, Norman P, Monk, Wendy, Cozens, Frances L

“…Absolute rate constants for the ionization of chloride from the 2-chloro-1-(4-methoxyphenyl)ethyl radical are measured in aqueous methanol and in alkali-metal…”
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Absolute Rate Constants for SN1-like Ionization Reactions in Zeolites:  Determination of Zeolite Ionizing Power by Ortiz, Wendy, Cozens, Frances L, Schepp, Norman P

“…A kinetic probe molecule has been developed to investigate the absolute ionizing power of cation-exchanged (LiY, NaY, KY, RbY, and CsY) Y-zeolites. The probe,…”
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