91150-43-5Relevant academic research and scientific papers
Picosecond Dynamics of Nonadiabatic Proton Transfer: A Kinetic Study of Proton Transfer within the Contact Radical Ion Pair of Substituted Benzophenones/N,N-Dimethylaniline
Peters, Kevin S.,Cashin, Amanda,Timbers, Peter
, p. 107 - 113 (2007/10/03)
Picosecond absorption spectroscopy has been employed in the study of the dynamics of proton transfer within substituted benzophenones/N,N-dimethylaniline contact radical ion pairs. The reactions were investigated in the solvents cyclohexane, benzene, and dimethylformamide. The correlation of the reaction rates with the change in free energy reveals that the reaction pathway corresponds to a nonadiabatic process, that is the reaction proceeds by proton tunneling. In nonpolar solvents, an inverted region is observed in the proton-transfer process.
Picosecond Dynamics of Proton Transfers
Manring, Lewis E.,Peters, Kevin S.
, p. 6452 - 6458 (2007/10/02)
The dynamics of proton transfer within an acid-base pair, which is created by a photoinduced electron transfer from an amine to a ketone, is investigated through picosecond absorption spectroscopy.Questions relating to molecular motion within the encounter complex and the distance dependence of proton transfer are addressed.Specifically, for substituted benzophenones and diphenylmethylamine, isotope and solvent dependence studies reveal that, although an acid-base pair is formed as an encounter complex, prior reorientation within the complex must take place before proton transfer.Other systems investigated include the transfer of a proton from the radical cation of N-methylacridan to the radical anions of benzophenone and anthraquinone as well as an intramolecular proton transfer for a molecule containing dimethylaniline linked to benzophenone by a methylene bridge.
