Chemical Nuclear Polarization of Biradicals Created by Photolysis of Cyclic Aliphatic Ketones in the Gas Phase

Chemical nuclear polarization (CNP) of short-lived biradicals created in the photolysis of cyclic ketones in the gas phase with a buffer gas of CDCl 3 molecules was studied theoretically and experimentally. The magnetoresonance and kinetic parameters were proposed for the biradicals. The experimental fact that the CNP of cycloundecanone in the gas phase and liquid was the strongest was confirmed by calculations. The computational results agree well with the experiment for both gas and liquid phases.