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7 results on '"Peon, Jorge"'

4. Solvents reorganization controls the rate of proton transfer from neat alcohol solvents to singlet diphenylcarbene

Author

Peon, Jorge, Polshakov, Dmitrii, and Kohler, Bern

Subjects
Methane -- Chemical properties, Absorption spectra -- Research, Chemistry
Abstract

Singlet diphenylcarbene generated by photodissociation of diphenyldiazomethane with a UV pulse at 266 nm is examined by femtosecond transient absorption spectroscopy. Study of rate of protonation of Ph(sub 2)(super 1)C in several neat alcohol solvents depicted that Ph(sub 2)(super 1)C protonation is among the fastest intermolecular proton-transfer reactions known.

Published
2002

5. DNA excited-state dynamics: ultrafast internal conversion and vibrational cooling in a series of nucleosides

Author

Pecourt, Jean-Marc L., Peon, Jorge, and Kohler, Bern

Subjects
Nucleosides -- Research, DNA -- Research, Excited state chemistry -- Analysis, Chemistry
Abstract

The way the femtosecond pump-probe measurements made at very low pump intensities are used to isolate the lowest excited singlet (S(sub 1)) dynamics from signals arising from multiphoton processes such as water photoionization is described. The measurements presented here provide a more complete and richly detailed picture of nucleobase photophysics by directly observing the ultrafast internal conversion and vibrational cooling.

Published
2001

7. Ultrafast carbonylcarbene formation and spin-equilibration

Author

Hess, Gina C., Kohler, Bern, Likhotvorik, Igor, Peon, Jorge, and Platz, Matthew S.

Subjects
Organic compounds -- Research, Chemistry
Abstract

The detection of singlet and triplet carbenes following excitation is reported.

Published
2000

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