Chemically induced dynamic nuclear time-resolved

It was initially assumed that the degradation of the phenacyl aryl ether bond occurred through the u-tt triplet excited state [14-18]. However, quenching experiments and time-resolved chemically induced dynamic nuclear polarization (CIDNP) spectra have indicated that there is significant photodegradation through the singlet excited state [23-27]. 

The seminal work of Marcus and Hush has had a significant impact on the development of PET. Pioneering efforts by Sutin, Hopfield, Jortner, and others established the connection between thermal electron transfer and photoelectron transfer [6]. This work set the stage for a notable series of experiments where laser flash spectroscopy [7], chemically induced nuclear polarization [8], resonance Raman spectroscopy [9], time-resolved microwave conductivity [10], and time-resolved photoacoustic calorimetry [11], to site only a few examples, have been successfully employed to chart the dynamics of PET in homogeneous solution, the solid-state, and organized assemblies. 

---