212180-89-7Relevant academic research and scientific papers
Photochemical and photophysical regularities of reduction of acetone with triethylamine
Markaryan
, p. 1012 - 1016 (2007/10/03)
The data on chemically induced dynamic polarization of nuclei (CIDPN) obtained in this work and the available data on chemically induced dynamic polarization of electrons (CIDPE) are used to examine photochemical and photophysiscal processes involved in the reduction of acetone by triethylamine (TEA). The time-resolved CIDPN method is used to study the efficiency of TEA as a chemical quencher and the effect of laser radiation intensity (308 nm) on polarization processes and the composition of the reaction products. The relative reactivities of the acetone T1 and S1 states depend on the TEA concentration and the laser irradiation intensity: at [TEA] 1.5 mol/l, singlet acetone molecules are also effectively quenched. At high irradiation intensities, the α-cleavage of triplet acetone also occurs via a two-photon process. The mechanism developed involves reverse proton transfer, disproportionation, and recombination with the participation of radical pairs and agrees with the CIDPN effects observed in experiment.
